Specification clauses for consultants

1. Pressure gauges shall be Bourdon tube type with SS 316 Bourdon tube and SS 316 socket, and SS 304 movement.
2. Case shall be SS 304, weatherproof and dust-proof, with blow-off disc at back, protected to IP 65 (IP 67 where specified).
3. Dial shall be 100 mm (150 mm) aluminium with black graduations on white background, with micrometer zero-adjustable pointer and shatterproof glass window.
4. Range shall be selected so that normal working pressure is about 50% and not more than 75% of full scale; units kg/cm² (dual scale kg/cm² and psi where specified).
5. Accuracy shall be ±1% FSD as per IS 3624, with over-range protection to 130% of full scale.
6. Process connection shall be 1/2" BSP (1/2" NPT / 3/8" BSP / M20 × 1.5), bottom entry, direct mounting (surface, flush or panel mounting where specified).
7. Gauges on pulsating or vibrating service shall be glycerine filled; gauges on steam service shall be fitted with a siphon; every gauge shall have a needle or ball isolation valve.
8. Each gauge shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Pressure gauges shall be Bourdon tube type, all stainless steel, with SS 316 Bourdon tube and SS 316 socket welded to the case, and SS 304 movement.
2. Case shall be SS 304, weatherproof and dust-proof, protected to IP 65 (IP 67 where specified).
3. Dial shall be 150 mm (100 / 200 / 250 mm), aluminium with black graduations on white, single scale in kg/cm² (dual scale kg/cm² and psi where specified).
4. Pointer shall be knife-edge type with micrometer zero adjustment; window shall be shatterproof (toughened) glass.
5. Accuracy shall be ±1% FSD as per IS 3624, with over-range protection to 130% of full scale.
6. Range shall be selected so that normal working pressure is about 50% and not more than 75% of full scale; vacuum and compound ranges as scheduled.
7. Process connection shall be 1/2" BSP (1/2" NPT / 3/8" BSP / 3/8" NPT), bottom entry, direct mounting.
8. Gauges on pulsating or vibrating service shall be glycerine filled; gauges on steam service shall be fitted with a siphon and isolation valve.
9. Each gauge shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Pressure gauges for outdoor and wash-down locations shall be weather proof Bourdon tube type with SS 316 Bourdon tube and SS 316 socket, and SS 304 movement.
2. Case shall be SS 304, weatherproof and dust-proof, protected to IP 65 (IP 67 where specified), with blow-off disc at back of case.
3. Dial shall be 150 mm (100 / 200 / 250 mm), aluminium with black graduations on white, with micrometer zero-adjustable pointer and shatterproof glass window.
4. Accuracy shall be ±1% FSD as per IS 3624, with over-range protection to 130% of full scale.
5. Range shall be selected so that normal working pressure is about 50% and not more than 75% of full scale; units kg/cm² (dual scale where specified).
6. Gauges shall be glycerine filled (silicone filled for low-temperature locations) where pulsation or vibration is present.
7. Process connection shall be 1/2" BSP (1/2" NPT / 3/8" BSP / M20 × 1.5), bottom entry, with needle or ball isolation valve; siphon on steam service.
8. Each gauge shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Pressure gauges for general utility service shall be Bourdon tube type with brass measuring system and brass movement.
2. Case shall be MS, powder coated, protected to IP 54, for indoor dry locations.
3. Dial shall be 100 mm (63 / 50 / 40 mm), aluminium with black graduations on white, single scale in kg/cm² (dual scale kg/cm² and psi where specified), with sheet glass window.
4. Range shall be as scheduled between 0–1 and 0–600 kg/cm², selected so normal working pressure is about mid-scale; over-range capability 130% of full scale.
5. Accuracy class shall be stated by the bidder and shall comply with IS 3624.
6. Process connection shall be 1/2" BSP (1/4" / 3/8" BSP, 3/8" / 1/2" NPT), bottom entry, direct mounting (surface, flush or panel mounting where specified).
7. Each gauge shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Test gauges shall be Bourdon tube type with SS 316 Bourdon tube and SS 316 socket, SS 304 movement, and SS 304 case protected to IP 65.
2. Accuracy shall be ±0.25% FSD as per IS 3624, with over-range protection to 130% of full scale.
3. Dial shall be 150 mm (200 / 250 mm), aluminium, high-resolution graduations in black on white, single scale in kg/cm² (dual scale kg/cm² and psi where specified).
4. Pointer shall be knife-edge type with micrometer adjustment; window shall be shatterproof (toughened) glass.
5. For pressure testing, gauge range shall be 1.5 to 4 times the test pressure (preferably about twice).
6. Process connection shall be 1/2" BSP (1/2" NPT / 3/8" BSP / M20 × 1.5), bottom entry, direct mounting.
7. Each test gauge shall be supplied with a manufacturer's calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Digital pressure gauges shall be battery-powered with backlit digital display, selectable engineering units, peak hold and zero (tare) function.
2. Pressure sensing element shall be isolated by a 316L stainless steel diaphragm; wetted parts shall be compatible with SS 316.
3. Accuracy shall be 0.5% of full scale, with over-pressure capability of 150% FS and long-term stability of ±0.2% FS per year.
4. Range shall be as scheduled between −100 kPa and 100 MPa; pressure reference gauge (absolute or sealed gauge where specified).
5. Housing shall be stainless steel; operating temperature −10 °C to 70 °C.
6. Power supply shall be 2 × AAA batteries with auto shut-off.
7. Process connection shall be bottom entry, size and thread as scheduled (1/4" NPT for compact gauges).
8. Each gauge shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Pressure switches for pump, compressor and process duty shall be electronic type with SS 316 wetted body, range as scheduled within 1 to 600 bar.
2. Each switch shall have two independently adjustable switching outputs (PNP / NPN as specified) with adjustable hysteresis, and a 4–20 mA analogue output.
3. Supply voltage shall be 24 V DC (15 to 35 V DC range).
4. Set point shall lie between about 25% and 75% of the switch range; set points and reset values shall be scheduled for each switch.
5. Air differential pressure switches for filter monitoring and fan proving shall have an adjustable set point and a change-over (SPDT, NO/NC/COM) contact.
6. Switches shall be installed with an isolation valve on liquid lines and with flexible tubing on air service.
7. Each switch shall be supplied with a manufacturer's test certificate stating set point and reset value.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Pressure transmitters shall be electronic, two-wire, loop powered, with 4–20 mA DC output proportional to pressure; supply 24 V DC (8 to 30 V DC).
2. Sensing element shall be SS 316 diaphragm with SS 316 wetted parts, suitable for liquid, gas and vapour.
3. Accuracy shall be 0.1% of full scale, with overload capability of three times span.
4. Range shall be as scheduled, gauge reference (absolute where specified), selected so that normal operating pressure is between about 50% and 75% of span.
5. Process connection shall be 1/2" NPT (1/2" BSP); flush diaphragm with flanged end for viscous, slurry or crystallising media; remote diaphragm seal with capillary for hot or corrosive media.
6. Enclosure shall be protected to IP65; transmitters requiring local indication shall have an integral digital display.
7. Each transmitter shall be installed with an isolation valve and supplied with a manufacturer's calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Differential pressure gauges shall indicate the pressure difference between high (+) and low (−) ports on a single dial, with a stainless steel case and stainless steel connection block.
2. Dial shall be 150 mm, white with black graduations, with black micro-adjustable pointer and front zero adjustment; window shall be glass (shatter-resistant polycarbonate where specified).
3. Range shall be as scheduled, selected so that the alarm or change-out pressure drop is about 50% to 75% of full scale.
4. Process connections shall be dual bottom entry, 1/2" NPT (1/4" NPT / 1/2" BSP).
5. Where specified for corrosive, hot or viscous media, gauges shall have SS 316 remote diaphragm seals with silicone-oil filled capillary and flanged process connections (1", ANSI Class 150 RF).
6. Each gauge shall be installed with a three-valve or five-valve manifold, or with isolation valves and an equalising valve.
7. Each gauge shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Low differential pressure gauges shall be diaphragm-actuated, magnetic-helix type, with no mechanical linkage between diaphragm and pointer, for air and non-combustible gases.
2. Dial shall be 100 mm (4"), with die-cast aluminium case and bezel, acrylic cover and front zero adjustment.
3. Range shall be as scheduled: 0–250 Pa for pre-filters (0–500 / 0–750 Pa for fine and HEPA filters; 0–60 Pa or 60–0–60 Pa for room pressure).
4. Accuracy shall be ±3% of full scale; pressure limits −70 kPa to 100 kPa; operating temperature −6.7 °C to 60 °C.
5. Gauges shall have duplicated 1/8" NPT(F) high and low pressure taps (side and back), and shall be supplied with plugs, tubing adapters and flush-mounting adapters.
6. Gauges shall be mounted with the diaphragm vertical, connected with flexible tubing to static pressure tappings on each side of the filter or room boundary.
7. Each gauge shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Differential pressure transmitters for air service shall be electronic, low-range type for air and non-combustible, non-corrosive gases, with range as scheduled.
2. Output shall be 4–20 mA two-wire (0–10 V DC three-wire where specified); supply 24 V DC (12–30 V DC).
3. Accuracy shall be ±0.5% of full scale (±0.25% FS where specified), with stability of ±0.25% FS per year.
4. Enclosure shall be protected to IP 65, with screw terminals and cable gland entry; operating temperature −25 °C to 70 °C.
5. Process connections for air service shall be barbed fittings for 3/16" flexible tubing, connected to static pressure tappings on either side of the filter, fan or room boundary.
6. Transmitters for liquid, steam and process service shall be smart type with 4–20 mA and HART output, integral LCD, SS 316 wetted parts and IP65 housing, with base accuracy of ±0.075% of span; remote diaphragm seals with 1" ANSI Class 150 RF flanges where specified.
7. Liquid-service transmitters shall be installed with a three-valve (five-valve where specified) manifold.
8. Each transmitter shall be supplied with a manufacturer's calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Temperature gauges shall be bimetallic, all-stainless-steel industrial thermometers with SS 304 case and bayonet bezel.
2. Dial size shall be 150 mm (100, 200 or 250 mm where specified), with aluminium dial, black graduations on white background and shatterproof glass window.
3. Range shall be selected so that normal operating temperature falls near mid-scale; accuracy shall be ±1% FSD as per EN 13190, with 130% overrange.
4. Stem shall be SS 316, 8 mm diameter, with immersion length to suit the pipe or vessel (adjustable up to 300 mm).
5. Mounting shall be every-angle type (bottom or back entry where specified) with 1/2" BSP process connection (1/2" NPT or M20 x 1.5 as per schedule).
6. Zero adjustment shall be by micrometer pointer; enclosure protection shall be IP65 (IP67 for exposed or wash-down locations).
7. Gauges on pressurised lines shall be fitted in thermowells so that they can be removed without draining the system.
8. Each gauge shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Temperature sensors for HVAC and general process duty shall be platinum resistance thermometers, Pt100 (100 Ω at 0 °C) [Pt1000 where specified for BMS controllers].
2. Sensors for high-temperature duty (furnaces, ovens, exhaust gas) shall be thermocouples of Type K [Type J, N, R, S or B as per the process temperature in the instrument schedule].
3. Each sensor shall be installed in a thermowell suited to the process medium, pressure and velocity, so that it can be removed without draining the line.
4. Insertion length, sheath material and process connection shall be as per the instrument schedule and pipe/vessel size.
5. Sensors shall be provided with a terminal head or cable termination suitable for the site location.
6. Where the signal is to be wired to a PLC, DCS or BMS over a long distance, a temperature transmitter with 4–20 mA output shall be provided.
7. Each sensor shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Temperature transmitters shall be 2-wire, loop-powered type with 4–20 mA output proportional to temperature, operating on 15–35 V DC.
2. Sensing element shall be Pt1000 to EN 60751 Class B [Pt100 or thermocouple input where specified in the instrument schedule].
3. Measuring range shall be configured to suit the application as per the instrument schedule.
4. Accuracy shall be ±0.5 °C or better at 50 °C.
5. Duct-mount transmitters shall have an Ø 8 mm x 200 mm AISI 316 stem with duct mounting flange, installed in a straight duct section away from coils and humidifiers.
6. Housing protection shall be IP54 minimum, with M16 cable entry, suitable for 0 to 60 °C ambient.
7. Each transmitter shall be supplied with a manufacturer's test certificate and wiring diagram.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Temperature switches shall be intelligent electronic type, integrating measurement, local display and switching in one stem-mounted unit.
2. Measuring range shall be -50 to 200 °C with accuracy of ±1.0 °C; display shall be 4-digit OLED with °C / °F selection and LED indication of switch status.
3. Each switch shall provide two independently set switch outputs, NPN / PNP selectable, rated 24 V, 1.2 A, plus a 4–20 mA analogue output.
4. Supply shall be 24 V DC (12–30 V DC); electrical connection shall be by M12 x 1 connector; enclosure protection shall be IP65.
5. Switches shall be installed in thermowells on pressurised lines; loads above the output rating shall be switched through interposing relays.
6. Room thermostats for floor heating shall be digital, wall-mounted, WiFi-enabled, for 95–240 V AC supply, with 5–35 °C set range and ±0.5 °C accuracy.
7. Thermostat contacts shall be rated 16 A for direct electric heating loads [3 A for water heater or boiler control].
8. Each instrument shall be supplied with a manufacturer's test certificate and wiring diagram.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Duct humidity and temperature sensors shall be combined RH and temperature transmitters, flange mounted with adjustable probe depth.
2. Measuring range shall be 0–100% RH and -50 to +50 °C.
3. Accuracy at 25 °C shall be ±2% RH typical between 20 and 80% RH (±3% RH maximum) and ±0.5 °C; long-term RH stability shall be ±0.5% RH over 24 months.
4. Outputs shall be 4–20 mA for RH and temperature [0–10 V DC where the BMS input requires] [Modbus RTU over RS-485 where the BMS integrates by network].
5. Supply shall be 24 V AC/DC.
6. Transmitter housing shall be IP54, installed with the probe or cable gland facing downwards; a local display shall be provided where specified.
7. Sensors shall be installed in a straight duct section with well-mixed air, downstream and clear of humidifiers, coils and dampers, with the probe tip in the main airstream.
8. Each transmitter shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Room temperature and humidity shall be measured by wall-mount combined temperature and RH transmitters with integral digital display.
2. Measuring range shall be -40 to +80 °C and 0–100% RH [-40 to +120 °C with high-temperature probe where specified].
3. Accuracy shall be ±0.5 °C at 25 °C and ±3% RH at 60% RH and 25 °C; long-term drift shall not exceed 0.1 °C and 1% RH per year.
4. Output shall be 4–20 mA [0–5 V or 0–10 V] [RS485 Modbus where the BMS integrates by network].
5. Supply shall be 10–30 V DC.
6. Sensors shall be located at representative points away from supply diffusers, doors, direct sun and heat sources.
7. Duct-mounted measurement shall be by flange-mounted duct humidity and temperature transmitters, specified separately.
8. Each instrument shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Portable temperature measurement shall be by a handheld infrared (non-contact) thermometer with digital display.
2. Distance-to-spot ratio shall be 12:1 minimum.
3. Emissivity shall be adjustable from 0.1 to 1.0.
4. Spectral response shall be 8–14 µm.
5. Display resolution shall be 0.1 °C, with °C / °F selection; repeatability shall be 1% of reading or 1 °C.
6. Instrument shall operate on a 9 V battery in an ambient of 0 to 40 °C.
7. Instrument shall be supplied with carrying case, battery, operating manual and manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Portable temperature and humidity measurement shall be by a handheld digital thermo-hygrometer measuring air temperature and relative humidity.
2. Measuring range and accuracy shall suit the application as per the instrument schedule.
3. Display shall be digital, backlit, showing temperature and RH together.
4. Instrument shall provide data hold and min/max/average functions.
5. Where surveys or audits are specified, the instrument shall have internal data logging with download to PC.
6. Instrument shall be supplied with carrying case, batteries, operating manual and manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Level gauges shall be magnetic flap type, comprising a sealed chamber with magnetic float and an external flap indicator, in SS 304 [SS 316 where the medium requires].
2. Float shall be selected to suit the density, pressure and temperature of the process liquid as per the instrument schedule.
3. Measurement accuracy shall be ±3 mm.
4. Centre-to-centre distance and visible length shall be as per the vessel nozzle drawing.
5. Process connections shall be flanged side connections matching vessel nozzles, size and rating as per the instrument schedule.
6. Each gauge shall have isolation valves on the vessel connections and a drain/vent valve on the chamber.
7. Where specified in the instrument schedule, magnetic level switches shall be mounted on the gauge chamber at the stated alarm points.
8. Each gauge shall be supplied with a manufacturer's test certificate and a general arrangement drawing.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Level switches shall be magnetic float type, with hermetically sealed reed switches inside a vertical stem operated by a float carrying a permanent magnet.
2. Stem and float material shall be SS 304 [PP or PVDF for corrosive liquids], suitable for liquids of density 0.6 g/cm³ or more.
3. Number of switch points and their heights shall be as per the instrument schedule; contacts shall be NO or NC as required by the control logic.
4. Contact rating shall be 40 VA (NO) / 60 VA (C/O); loads above this shall be switched through interposing relays.
5. Insertion length shall suit the tank depth (150 to 3000 mm); service rating shall be up to 80 °C and 10 kg/cm².
6. All switch wiring shall terminate in a single top-mounted housing protected to IP65.
7. Switches shall be mounted away from inlets and turbulence; in agitated tanks a stilling pipe shall be provided; side-wall supports shall be used in concrete tanks.
8. Each switch shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Level transmitters for water and wastewater tanks, sumps and wells shall be non-contact ultrasonic type, top mounted, with built-in temperature compensation.
2. Measuring range shall suit the tank height plus blind zone as per the instrument schedule (5, 10, 15, 20, 30 or 50 m integrated; up to 70 m separated).
3. Accuracy shall be 0.5% of full scale or better, with resolution of 3 mm or 0.1% FS, whichever is larger.
4. Output shall be 4–20 mA [2-wire or 4-wire as per the schedule], with RS485 digital output and programmable relay alarm contacts rated 250 V AC, 8 A.
5. Transmitter shall have an LCD display showing level, distance and alarm status, with on-site setting of span, alarms and blind zone.
6. Enclosure protection shall be IP65 minimum [IP68 transducer for separated type in wet wells]; separated type shall be supplied with 10 m transducer cable.
7. Transmitter shall be installed clear of inlets, ladders and wall obstructions so the beam reaches the surface without false echoes; the maximum level shall stay outside the blind zone.
8. Closed vessels with vapour, foam, dust or high temperature shall use radar level transmitters, specified separately.
9. Each transmitter shall be supplied with a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Electromagnetic flowmeter shall be of inline type working on Faraday's principle, with no moving parts and no obstruction to flow, suitable for liquids of conductivity above 10 µS/cm.
2. Meter size shall be selected from the flow schedule (DN 10 to DN 2000) so that normal velocity lies within the measuring range, with SS 304 measuring tube, carbon steel housing and flanges to ANSI 150 (DIN PN / BS 10 Table D/E as specified).
3. Liner shall be hard rubber for water service (PTFE / PFA / polyurethane for chemical or abrasive service) and electrodes SS 316 (SS 316L / Hastelloy C / titanium / tantalum to suit the fluid).
4. Measuring range shall be 0.2 to 12 m/s bidirectional, with accuracy ±0.5% of measured value and repeatability ±0.2% of span.
5. Transmitter shall be integral (remote, with 10 m cable) with a 2-line display of flow rate and totaliser and 4–20 mA output (pulse / relay / RS 485 Modbus RTU as specified), powered from 80–300 V AC (24 V DC).
6. Pressure rating shall be 10 kg/cm² (16 / 25 / 40 kg/cm²); protection IP67 for the transmitter and IP65 for the flow tube (IP68 for remote flow tubes in pits).
7. Earthing rings shall be provided where the connecting pipe is non-conductive or lined, and the installation shall provide 5D upstream and 3D downstream straight length with the tube always full.
8. Each flowmeter shall be supplied with a manufacturer's calibration certificate, dimensional drawing and installation manual.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Flowmeter shall be of transit-time ultrasonic type with clamp-on transducers mounted outside the pipe, requiring no pipe cutting, welding or process shutdown (insertion transducers through isolating ball valves where specified).
2. Transducers shall suit the specified pipe size, material and lining within 15 mm to 4570 mm, rated −40 to 120 °C (high-temperature type, −40 to 250 °C, where specified).
3. Measurement shall be bidirectional up to ±12 m/s with accuracy ±1% of reading above 0.5 m/s and repeatability 0.2% of span.
4. Transmitter shall be wall mounted with a backlit LCD showing flow rate, velocity and forward, reverse and net totals, with keypad lockout.
5. Output shall be isolated 4–20 mA DC (RS 485 Modbus where specified); power supply 240 V AC ±15% (24 V DC ±20%).
6. Transducer cable shall be 6 m standard, extendable up to 300 m, with transducers fixed by SS straps and suitable coupling compound.
7. Transducers shall be installed on a full, straight section of pipe with upstream and downstream straight lengths as recommended by the manufacturer.
8. Each flowmeter shall be supplied with a manufacturer's test certificate, installation manual and mounting accessories.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Portable flowmeter shall be of transit-time ultrasonic type with clamp-on transducers, requiring no pipe cutting or process interruption.
2. Handheld unit shall run on built-in rechargeable NiMH batteries for about 12 hours per charge, with a 100–240 V AC charger.
3. Measurement shall be bidirectional up to ±12 m/s with accuracy 1.0% of reading above 0.5 m/s and repeatability 0.2% of reading.
4. Kit shall include S, M and L transducers covering pipes from 12 mm to 4570 mm (sizes as specified), rated −40 to 121 °C (high-temperature transducers, −40 to 250 °C, where specified).
5. Display shall be a backlit 4-line LCD showing flow rate, velocity and totaliser in user-selectable metric or English units, with keypad lockout.
6. Outputs shall include 4–20 mA (pulse / relay / RS 232C / RS 485 as specified).
7. Kit shall be supplied in a carrying case with mounting belts, couplant, charger, operating manual and a manufacturer's test certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. BTU meter shall measure thermal energy in chilled water (hot water) circuits from flow and supply and return temperatures, comprising an ultrasonic transit-time flowmeter, a matched pair of PT100 RTDs and an energy calculator.
2. Flow sensors shall be clamp-on (insertion) type suitable for the specified pipe size within 2" to 80", installed without cutting the pipe or draining the system.
3. Energy calculator shall accept 4–20 mA flow input and two PT100 inputs, with energy calculator accuracy of ±2% of full scale and temperature drift not exceeding 0.015% of full scale per °C.
4. Calculator shall display instantaneous power and totalised energy in kW and kWh (TR / MBTU as specified) on a backlit LCD, and retain the total on power failure.
5. Calculator shall provide an isolated 4–20 mA output proportional to power and Modbus RTU over RS 485 (Modbus IP / BACnet IP as specified) for BMS integration.
6. Calculator shall log at least 4900 hourly readings and be housed in an IP67 wall-mounted enclosure, powered from 85–265 V AC, 50 Hz.
7. Temperature sensors shall be installed in thermowells on the supply and return lines, and flow sensors on a straight, full section of pipe as recommended by the manufacturer.
8. Each BTU meter shall be supplied with a manufacturer's test certificate, wiring diagram and Modbus/BACnet point list.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Flowmeter shall be of vortex shedding type with no rotating parts, suitable for saturated steam (compressed air / gas / liquid as specified).
2. Meter size shall be selected from the minimum, normal and maximum flow so that minimum flow remains within the linear range, and may be smaller than the line size.
3. Accuracy shall be ±1% of reading or better over a turndown of at least 10:1.
4. Meter shall be rated for the specified process pressure and a process temperature up to 150 °C, with process connections as specified.
5. Transmitter shall be integral with a local digital display of flow rate and totaliser, powered by 24 V DC, with HART (RS 485) communication.
6. Pressure and temperature compensation shall be provided where mass or normalised flow is required.
7. Installation shall provide straight upstream and downstream lengths as recommended by the manufacturer, free of vibration.
8. Each flowmeter shall be supplied with a manufacturer's calibration certificate and installation manual.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Flowmeter shall be of Coriolis (thermal mass, for gases) type measuring mass flow directly, independent of fluid density, suitable for the specified liquid.
2. Meter size shall be selected for the specified minimum, normal and maximum flow with acceptable pressure drop at the fluid viscosity.
3. Wetted parts shall be stainless steel, with flanged end connections rated for the specified process pressure and temperature.
4. Transmitter shall have a digital display of mass flow and totaliser, with 4–20 mA output, powered by 24 V DC.
5. Enclosure protection shall be IP67.
6. Meter shall be installed on supported pipework, isolated from pump vibration, with the tubes kept full of liquid.
7. Each meter shall be supplied with a manufacturer's calibration certificate and installation manual.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Flowmeter shall be of axial turbine type with a free-running rotor and magnetic pickup, suitable for the specified clean, low-viscosity liquid (gas).
2. Meter size shall be selected so that minimum and maximum process flows fall within the meter's linear range.
3. Wetted parts shall be stainless steel or other materials compatible with the process fluid.
4. Meter shall be rated for the specified process pressure and temperature, with process connections to match the line.
5. Output shall be a pulse signal proportional to flow (4–20 mA through a converter, and local rate and total display, as specified).
6. A strainer shall be provided upstream, with straight upstream and downstream lengths as recommended by the manufacturer.
7. Each flowmeter shall be supplied with a manufacturer's calibration certificate stating the K-factor, and an installation manual.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Gas flowmeter shall be of turbine type (vortex / thermal mass as specified), suitable for the specified gas (LPG vapour / natural gas) at the stated pressure and temperature.
2. Meter size shall be selected so that minimum and maximum gas flows fall within the meter's rated range.
3. Meter shall display instantaneous flow rate and totalised volume, with pressure and temperature correction to standard conditions where specified.
4. Output shall be as specified (pulse / 4–20 mA / RS 485 Modbus) for connection to the BMS or PLC.
5. Meter enclosure shall be suitable for the specified area classification, with the hazardous-area rating confirmed by the supplier at the time of offer.
6. A gas filter shall be installed upstream, with straight lengths as recommended by the manufacturer.
7. Each meter shall be supplied with a manufacturer's calibration certificate and installation manual.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Compressed air flowmeter shall be of thermal mass type (vortex / differential pressure as specified), reading flow at normal conditions in Nm³/h without external compensation.
2. Meter shall be suitable for the specified pipe size and operating pressure, inline (insertion through a ball valve) type.
3. Flow range shall cover both peak demand and minimum non-production (leak) flow at the installed location.
4. Meter shall display instantaneous flow and totalised volume locally.
5. Output shall be 4–20 mA and pulse (RS 485 Modbus as specified) for connection to the energy monitoring system.
6. Meter shall be installed downstream of the air dryer where practicable, with straight lengths as recommended by the manufacturer.
7. Each meter shall be supplied with a manufacturer's calibration certificate and installation manual.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Water meter shall be of mechanical helical vane (Woltman) type conforming to ISO 4064, suitable for cold water up to 50 °C.
2. Meter size shall be as per the drawing/schedule within 15 mm to 300 mm, selected on the design flow rate.
3. Body shall be stainless steel casting, rated 10 bar operating and 16 bar maximum pressure.
4. Meter shall have an analogue register showing totalised volume.
5. Meter shall be installed as per the manufacturer's instructions, with a strainer upstream, isolation valves on both sides and straight lengths as recommended by the manufacturer.
6. Each meter shall be supplied with a manufacturer's test certificate and a warranty of one year.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Flow indicator shall be of variable area (rotameter) type with a borosilicate glass tapered tube and float, for the specified clean liquid (gas).
2. Scale shall be calibrated directly in the specified engineering units for the actual fluid and operating conditions, with the flow range selected so that normal flow lies in the middle part of the scale.
3. Float, end fittings and O-rings shall be compatible with the process fluid.
4. Rotameter shall be rated for the specified process pressure and temperature, with a protective cover over the glass tube.
5. An integral needle valve shall be provided where flow setting is required.
6. Rotameter shall be installed vertically with flow upward, with isolation valves for removal.
7. Each rotameter shall be supplied with a manufacturer's test certificate stating the calibration fluid and conditions.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Open channel flowmeter shall be of non-contact ultrasonic type measuring head upstream of the specified Parshall flume (weir) and computing flow from the standard flume (weir) equation.
2. Flowmeter shall be of integral type (split type, with probe cable of 10 m, extendable to 100 m) with LCD showing flow rate, head and totalised volume.
3. Level range shall be 1 m (2 m / 3 m) with level accuracy 0.5% and resolution of 3 mm or 0.1%, whichever is greater; the probe blind zone shall be considered in mounting height.
4. Output shall be 4–20 mA into 600 Ω (two relay outputs and RS 485 Modbus as specified).
5. Power supply shall be 220 V AC, 50 Hz (24 V DC / solar as specified).
6. Probe shall be IP68, ABS (corrosion-resistant material for corrosive effluent), rated −20 to 80 °C; display enclosure IP65 for integral type (IP64 for split type).
7. Flume or weir shall be constructed to the applicable national standard, and the probe mounted vertically above the head measuring point, clear of channel walls.
8. Each flowmeter shall be supplied with a manufacturer's test certificate and installation manual.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Flow switch shall be of paddle type, suitable for water (or the specified non-hazardous liquid compatible with brass and phosphor bronze), for mounting on a 1" to 6" line as per schedule.
2. Paddle shall be trimmed to the pipe size, with flow actuation points as per the manufacturer's flow control range table.
3. Switch shall have one SPDT potential-free contact rated 220 V AC, 3 A, for alarm or interlock.
4. Switch shall be rated for a maximum line pressure of 1.6 MPa, with enclosure protection IP54.
5. Where a differential pressure flow switch is specified (across an orifice, filter or heat exchanger), it shall have a piston-actuated diaphragm, an SS 316L sensing element, snap-action SPDT switch rated 15 A at 250 V AC, adjustable set point with locking, and pressure die-cast aluminium enclosure to IP66.
6. Switch shall be installed in a horizontal pipe (or vertical pipe with upward flow), with straight pipe on each side as recommended by the manufacturer.
7. Each flow switch shall be supplied with a manufacturer's test certificate and installation instructions.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Duct air flow measuring station shall comprise a multi-point averaging pitot probe and a differential pressure air flow transmitter.
2. Probe shall have sensing ports positioned by the log-Tchebycheff method (6, 8 or 10 ports according to duct size), with accuracy ±2%, sized to the duct internal dimension.
3. Probe shall be of aluminium with a mild steel mounting plate, expanded foam gasket and barbed brass high and low pressure fittings for 1/4" OD tubing; probes of 350 mm and longer shall be supported at the far end.
4. Transmitter shall use a MEMS sensing element with no flow-through, and display volume flow (m³/h, l/s or cfm) or velocity (m/s) together with differential pressure on a 2-line display.
5. Transmitter shall operate from −20 to 50 °C (−5 to 50 °C with autozero), with IP54 enclosure, terminal block connections and M16 cable entry.
6. Probe shall be installed on a straight duct section with adequate upstream and downstream lengths as recommended by the manufacturer, away from dampers, bends and fans.
7. Where single-point velocity measurement is specified, a duct air velocity sensor of 0–15 m/s (0–20 / 0–30 m/s) with 4–20 mA (0–10 V / RS 485) output and accuracy ±(0.2 m/s + 2% FS) shall be provided.
8. Each instrument shall be supplied with a manufacturer's test certificate, K-factor data for the probe and an installation manual.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a portable digital anemometer for measurement of air velocity during testing, adjusting and balancing of air-distribution systems, to be handed over with the facility management instrument kit.
2. The anemometer shall be of the rotating-vane type for grilles, diffusers and coil faces (hot-wire probe type where low velocities or in-duct readings through a test hole are required).
3. The instrument shall have a digital display reading in m/s (ft/min selectable), with data logging where specified in the schedule.
4. Measuring range, resolution and accuracy shall suit the design air velocities and shall be stated in the bidder's technical datasheet for approval.
5. The instrument shall be battery-operated and supplied with batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a portable digital sound level meter for noise measurement during commissioning of HVAC, plumbing and electrical equipment, to be handed over with the facility management instrument kit.
2. The meter shall be of Class 2 (Type 2) accuracy (Class 1 where results are for regulatory or acoustic consultancy reporting), with A and C frequency weighting and Fast and Slow time weighting.
3. The meter shall be an integrating type indicating Leq, with data logging where specified in the schedule.
4. Measuring range shall cover the expected levels from occupied spaces to plant rooms, and range and accuracy shall be stated in the bidder's technical datasheet for approval.
5. The meter shall be supplied with foam windscreen, batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a portable digital lux meter for illuminance measurement during lighting commissioning, to be handed over with the facility management instrument kit.
2. The meter shall read illuminance in lux (foot-candle selectable) and shall have a cosine-corrected sensor.
3. The meter shall have data hold and Min/Max/Avg functions, with data logging where specified in the schedule.
4. Measuring range shall cover the design illuminance of all areas from external and car-park lighting to task areas, and range, resolution and accuracy shall be stated in the bidder's technical datasheet for approval.
5. The meter shall be supplied with batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a portable digital moisture meter for checking walls, floors, screeds and timber during finishing works, to be handed over with the facility management instrument kit.
2. The meter shall be a combined pin and pinless type (pin type or pinless type where specified), with a digital display and data hold.
3. The meter shall have calibration settings for wood and for building materials.
4. Measuring range and accuracy for each material setting shall be stated in the bidder's technical datasheet for approval.
5. The meter shall be supplied with batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a portable digital coating thickness gauge for checking dry film thickness of paint and powder coating on steelwork, supports, panels and equipment during site inspection, to be handed over with the facility management instrument kit.
2. The gauge shall be a combined type for ferrous (magnetic induction) and non-ferrous (eddy current) substrates (single-substrate type where specified).
3. Measurement shall be non-destructive, with a digital display and data logging where specified in the schedule.
4. Measuring range, resolution and accuracy shall suit the specified coating thicknesses and shall be stated in the bidder's technical datasheet for approval.
5. The gauge shall be supplied with certified thickness standards for verification, batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of portable temperature and humidity data loggers for recording space conditions during HVAC commissioning and seasonal performance checks, to be handed over with the facility management instrument kit.
2. Each logger shall record temperature and relative humidity (other parameters where specified) at a user-set sampling interval, with time-stamped storage.
3. Loggers shall be battery-powered, with alarm indication on pre-set limits and data download by USB (Ethernet, Wi-Fi or cellular where remote access is specified).
4. Measuring range, accuracy, memory capacity and battery life shall suit the required logging period and shall be stated in the bidder's technical datasheet for approval.
5. Loggers shall be supplied with data analysis and reporting software, operating manual and a manufacturer's test/calibration certificate for each logger.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a portable digital tachometer for measuring the speed of fans, motors and pumps during commissioning, to be handed over with the facility management instrument kit.
2. The tachometer shall be a non-contact optical or laser type (contact type where a reflective mark cannot be applied), reading in RPM on a digital display.
3. The instrument shall have data hold and Min/Max/Avg functions, with data logging where specified in the schedule.
4. Measuring range and accuracy shall cover the speeds of all rotating equipment in the schedule and shall be stated in the bidder's technical datasheet for approval.
5. The instrument shall be supplied with reflective tape, batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a handheld digital multimeter for electrical testing during commissioning, to be handed over with the facility management instrument kit.
2. The multimeter shall measure AC/DC voltage, AC/DC current, resistance, capacitance, frequency, continuity and diode test, with auto-ranging and a digital display.
3. The multimeter shall be True RMS, with data hold and Min/Max/Avg functions.
4. The CAT safety rating, ranges and accuracy shall suit the highest-energy point at which the meter will be used and shall be stated in the bidder's technical datasheet for approval.
5. The multimeter shall be supplied with test leads, batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a handheld digital clamp meter for measuring running current of motors, compressors and feeders during commissioning, to be handed over with the facility management instrument kit.
2. The clamp meter shall be True RMS, measuring AC current (AC/DC where DC circuits such as solar PV, battery or UPS systems are in scope), with jaw opening to suit the largest conductor to be measured.
3. The meter shall also measure voltage and resistance, with data hold and Min/Max functions and a digital display.
4. Current range, accuracy and CAT safety rating shall suit the highest current and installation category at the point of use and shall be stated in the bidder's technical datasheet for approval.
5. The meter shall be supplied with test leads, batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Supply of a portable digital vibration meter for acceptance checks and routine condition monitoring of pumps, fans, motors, compressors and AHUs, to be handed over with the facility management instrument kit.
2. The meter shall measure vibration velocity, acceleration and displacement, displaying overall levels on a digital display.
3. Where analysis is specified, the instrument shall be a vibration analyser with FFT spectrum and time-waveform display and data logging.
4. Frequency range, measuring ranges and accuracy shall suit the running speeds of the equipment in the schedule and shall be stated in the bidder's technical datasheet for approval.
5. The meter shall be supplied with its sensor and probe or magnetic mount, batteries, carrying case, operating manual and a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Carbon monoxide (CO) sensors shall be provided in car parks, boiler rooms and DG set rooms, and carbon dioxide (CO2) sensors in occupied spaces, at the locations shown on the drawings.
2. CO sensors shall use an electrochemical sensing cell; CO2 sensors shall use a non-dispersive infrared (NDIR) sensing element.
3. Measuring range and alarm set points shall be as per the schedule; each sensor shall have local alarm indication [and digital display where scheduled].
4. Output shall be 4–20 mA [or RS485 digital] for connection to the BMS or car park ventilation controller, which shall stage exhaust and jet fans on CO level and modulate outdoor air on CO2 level.
5. Enclosures in car parks and plant rooms shall be waterproof and suitable for wall mounting; wireless CO sensors may be used where cabling is impractical, subject to a site signal survey.
6. CO sensors shall be mounted in the breathing zone, away from direct vehicle exhaust, ramps, doors and supply air jets; CO2 sensors shall be mounted in the occupied zone, away from doors, windows and supply diffusers.
7. Each sensor shall be supplied with a manufacturer's test/calibration certificate, and the bidder shall state the recommended calibration interval and sensor replacement period.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Indoor air quality sensors shall be provided in the spaces shown on the drawings to measure CO2, temperature and relative humidity [plus PM2.5/PM10 and TVOC where scheduled].
2. CO2 shall be measured by a non-dispersive infrared (NDIR) element over the scheduled range (typically 400–2,000 ppm).
3. Temperature and humidity shall be displayed and transmitted with a resolution of 0.1 °C and 0.1 %RH.
4. Output shall be RS485 (Modbus RTU) [or 4–20 mA / 0–10 V DC per parameter] for connection to the BMS.
5. Sensors shall be wall mounted at 1.2–1.5 m above finished floor in the occupied zone, away from doors, windows, supply diffusers and heat sources.
6. Each sensor shall be supplied with a manufacturer's test/calibration certificate, wiring diagram and Modbus register map.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Air flow and velocity transmitters shall be provided on the fans, AHUs and duct branches shown on the drawings to measure and display air volume flow and velocity.
2. For fan air flow, the transmitter shall connect to the fan inlet pressure measuring points and calculate volume flow from the measured differential pressure; for duct velocity, a duct-mounted probe with a range of 0–15 m/s [0–20 / 0–30 m/s] shall be used.
3. The sensing element shall be MEMS type with no flow-through, suitable for dry air or non-aggressive gases.
4. The transmitter shall have a two-line display showing volume flow or velocity and pressure, with units selectable between m³/h, m³/s, l/s and cfm, m/s and ft/min, and Pa, kPa, mbar, mmWC and inWC.
5. Operating range shall be -20 to 50 °C [-40 to 50 °C] and 0–95 %RH non-condensing; the enclosure shall be IP54 with ABS case and polycarbonate lid.
6. Output shall be 4–20 mA [0–10 V or RS485] for connection to the BMS; wiring shall terminate on a screw terminal block through an M16 strain-relief cable entry.
7. Duct probes shall be installed in a straight duct run away from bends, dampers and fittings, as recommended by the manufacturer.
8. Each instrument shall be supplied with a manufacturer's test/calibration certificate and an installation and wiring diagram.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Fixed gas detectors (gas transmitters) shall be provided at the locations shown on the drawings for the target gases scheduled: combustible gases in %LEL, toxic gases in ppm, oxygen in % vol and refrigerants.
2. Sensing technology shall suit the target gas: catalytic bead or infrared for combustible gases, electrochemical for toxic gases and oxygen, and infrared [or semiconductor] for refrigerants.
3. Sampling shall be by diffusion [pumped sampling where the detector cannot be placed at the sampling point].
4. Each detector shall have local audible and visual alarm indication and shall give a 4–20 mA [Modbus] output to the gas detection control panel, PLC or BMS.
5. Detectors for lighter-than-air gases shall be mounted near the ceiling and for heavier-than-air gases near the floor, close to likely leak sources and as per the manufacturer's guidance.
6. Detectors installed in classified hazardous areas shall carry Ex marking suitable for the zone, gas group and temperature class; the bidder shall submit the certificate and any statutory approval required for the site.
7. Flame detectors, where scheduled, shall be UV/IR [IR / multi-spectrum IR] type with relay [4–20 mA] output and self-test, positioned so that their field of view covers the protected hazard.
8. Each detector shall be supplied with a manufacturer's test/calibration certificate; the bidder shall state the calibration gas, calibration interval and expected sensor life.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Portable pH meters [benchtop pH/conductivity meters] shall be supplied for water and effluent testing as scheduled.
2. The pH meter shall have a resolution of 0.01 pH and an accuracy of ±0.01 pH ±1 digit.
3. The meter shall support 1 to 3 point calibration with standard buffer solutions and shall have automatic temperature compensation over 0 to 60 °C.
4. The meter shall also read mV (ORP) over -1000 to +1000 mV and sample temperature with ±0.2 °C accuracy.
5. Where conductivity is scheduled, the conductivity cell constant shall suit the sample range (low-conductivity water, general water or high-conductivity water).
6. Each meter shall be supplied with a pH electrode [and conductivity cell], calibration buffer solutions, electrode storage solution and a carrying case.
7. Each meter shall be supplied with a manufacturer's test/calibration certificate and operating instructions.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Portable oxygen detectors shall be supplied for confined space entry and for areas where inert gases or liquid nitrogen are stored, in the quantities scheduled.
2. The detector shall measure oxygen over 0–30 % vol using an electrochemical sensor with natural diffusion sampling.
3. The response time shall be 30 s or better.
4. The detector shall give vibration, audible and visual alarms, with a low alarm set at 19.5 % vol and a high alarm at 23.5 % vol [or as per the site safety procedure].
5. The detector shall be powered by a replaceable lithium battery.
6. Where the detector is to be used in a classified hazardous area, the bidder shall submit evidence of suitable certification for that area.
7. Each detector shall be supplied with a manufacturer's test/calibration certificate, and the bidder shall state the sensor life and recommended calibration and bump-test intervals.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Each cleanroom shall be provided with a room monitoring panel at the entry, displaying room temperature, relative humidity and differential pressure with respect to the adjacent area.
2. The panel shall have a 316L stainless steel front plate, not less than 1.5 mm thick, flush mounted in the wall or partition panel with a cleanable, gap-free finish.
3. Temperature, humidity and differential pressure sensing shall be built in; ranges shall suit the room design conditions and pressure cascade shown on the drawings.
4. The panel shall display all three parameters together [or in turn] with a resolution of 0.1 engineering unit.
5. The panel shall provide three 0–10 V analogue outputs for connection to the BMS/EMS, and shall accept up to three 4–20 mA or 0–10 V external inputs where scheduled.
6. Power supply shall be 24 V AC/DC; the panel shall operate at 0–50 °C and 0–95 %RH non-condensing.
7. Particle counters and microbial air samplers, where scheduled, shall be supplied as separate instruments to suit the cleanroom class under ISO 14644-1.
8. Each panel shall be supplied with a manufacturer's test/calibration certificate for each built-in sensor and a wiring diagram.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. Dew point transmitters shall be provided at the outlet of each compressed air dryer and at the locations shown on the drawings.
2. Measuring range shall be -60 to +20 °C dew point [-80 to +20 °C for desiccant dryers with a design dew point below -60 °C].
3. Accuracy shall be ±2 °C dew point or better, with repeatability of 0.5 °C dew point.
4. Output shall be 4–20 mA for connection to the compressor controller, PLC or BMS.
5. The transmitter shall be rated for a working pressure of 5 MPa [15 MPa] and shall have a stainless steel housing with a G1/2 process connection.
6. The sensor shall be protected by a stainless steel filter with pore size smaller than 8 µm, and the transmitter shall comply with IEC 61326-1 for EMC.
7. The transmitter shall be installed in the line or in a sampling cell with a controlled bleed, mounted from the top or side of the pipe and away from condensate traps and dead legs.
8. Each transmitter shall be supplied with a manufacturer's test/calibration certificate.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.

1. A wind direction sensor shall be provided on the roof mast [weather station mast] at the location shown on the drawings.
2. The sensor shall be a wind vane with encoder [potentiometer] output, or an ultrasonic wind sensor where wind speed and direction are both required from one instrument.
3. Output shall be 4–20 mA [0–10 V / RS485 serial] for connection to the BMS or data logger.
4. The sensor shall be weatherproof and suitable for continuous outdoor exposure to sun, rain and wind.
5. The sensor shall be mounted at the top of the mast, clear of obstructions and roof-top turbulence, with its north reference aligned to true north.
6. The bidder shall state accuracy, resolution and starting threshold, and shall supply a manufacturer's test certificate, mounting bracket and wiring diagram.
Make: Pioneer Industrial Instruments, Pune, or approved equivalent.