Temperature Instruments · TS

Temperature Switches and Thermostats — Digital Temperature Switch and WiFi Room Thermostat

Pioneer supplies an intelligent digital temperature switch for -50 to 200 °C media, with ±1.0 °C accuracy, a 4-digit OLED display, two NPN/PNP-compatible switch outputs plus 4–20 mA and IP65 protection, and a WiFi room thermostat for floor heating with a 5–35 °C set range and ±0.5 °C accuracy.

Measurement range: -50 to 200 °C (-58 to 392 °F)
Accuracy: ±1.0 °C (±2 °F)
Protection: IP65

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Temperature Switches and Thermostats by Pioneer

Overview

What it does and where it fits.

A temperature switch changes an output when the measured temperature crosses a set point. It is used for alarms, interlocks and simple on-off control, such as tripping a pump on high bearing or oil temperature, or starting a cooling fan. A thermostat does the same job for room or floor temperature, switching a heater, boiler or valve to hold a set temperature.

Pioneer's intelligent temperature switch combines measurement, display and switching in one compact stem-mounted unit. It has two switch outputs, compatible with NPN and PNP inputs, and a 4–20 mA output, so one instrument can give a local reading, two alarm or control points and an analogue signal to the PLC. It runs on 12–30 V DC (24 V recommended) and connects through an M12 x 1 round-pin connector.

The room thermostat is a wall-mounted digital unit for floor heating systems, powered from 95–240 V AC. It switches up to 16 A for electric heating, or 3 A where it controls a water heater, water boiler or gas boiler, and connects over WiFi.

Types

Intelligent digital temperature switchStem-mounted switch for liquids and gases, -50 to 200 °C, with OLED display, two switch outputs and 4–20 mA.
WiFi room thermostat for floor heatingWall-mounted digital thermostat, 5–35 °C set range, switching electric heating up to 16 A or boiler control up to 3 A.

Features

Temperature switch range -50 to 200 °C, ±1.0 °C accuracy
Two switch outputs, NPN and PNP compatible, plus 4–20 mA
4-digit OLED display, °C / °F switchable
LED indication of switch status
Adjustable response time; response ≤ 20 ms
Button set-up with one-click zero calibration
M12 x 1 connector, IP65
Thermostat: ±0.5 °C accuracy, WiFi, 16 A load rating

Applications

High-temperature alarms and trips on pumps, compressors and hydraulic units
Cooling water, oil and process line temperature interlocks
City water supply and hydropower installations
Chemical process temperature control
Laboratory and research equipment
Floor heating with electric heaters, water heaters or boilers

Specifications

Spec table.

Standard ranges and materials. Tell us your medium, range and connection and we will match the model.

Ask for a data sheet

Parameter	Value
Instrument	Intelligent digital temperature switch
Measurement range	-50 to 200 °C (-58 to 392 °F)
Accuracy	±1.0 °C (±2 °F)
Display	OLED, 4 digits; °C / °F
Outputs	2 switch outputs, NPN and PNP compatible, plus 4–20 mA
Switch load capacity	≤ 24 V, 1.2 A
Power supply	12–30 V DC, 24 V recommended
Power consumption	≤ 15 mA
Response time	≤ 20 ms
Electrical connector	M12 x 1, round pins
Medium temperature	-50 to 200 °C
Operating temperature	-25 to 80 °C
Storage temperature	-40 to 100 °C
Insulation	100 MΩ at 250 V DC
Protection	IP65

WiFi room thermostat for floor heating

Parameter	Value
Application	Floor heating systems
Power supply	95–240 V AC, 50–60 Hz
Load rating	16 A (electric heating); 3 A (water heater, water boiler or gas boiler)
Accuracy	±0.5 °C (±1 °F)
Set temperature range	5 to 35 °C
Display temperature range	5 to 99 °C
Ambient humidity	5–95% RH, non-condensing
Storage temperature	-5 to 45 °C
Power consumption	< 1.5 W
Timing error	< 1%
Power supply type	Self-excited switching power supply
Connectivity	WiFi

Process connection, probe diameter and stem length of the temperature switch are confirmed at enquiry to suit the pipe or vessel.

For consultants

Consultant spec clause.

Paste it into your technical specification or BOQ, then adjust ranges and quantities to your schedule.

All spec clauses Download .txt

temperature-switches-and-thermostats · spec clause

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.

FAQ

Questions about Temperature Switches and Thermostats.

Anything else? Call or WhatsApp +91 93700 39974.

What is the difference between a temperature switch, a thermostat and a temperature transmitter?

A temperature switch changes a contact or transistor output at a set point, for alarms and interlocks on machines and process lines. A thermostat is a switch built to hold a room or floor at a set temperature by cycling a heater, boiler or valve. A transmitter only sends a continuous 4–20 mA signal. Pioneer's intelligent switch does both: two switch outputs and a 4–20 mA output.

Should I wire the temperature switch outputs as NPN or PNP?

Match the input card. PNP (sourcing) outputs switch the positive supply to the load and suit most European-style PLC inputs, which are common in India. NPN (sinking) outputs switch to 0 V and suit sinking-type inputs. Pioneer's switch is compatible with both, so the same instrument fits either system; set the output type during commissioning.

Can the temperature switch drive a contactor or solenoid directly?

Only if the load is within the output rating of 24 V, 1.2 A. A small 24 V DC relay or solenoid is usually fine. Contactor coils on 230 V AC, motors and heaters must be switched through an interposing relay. For safety trips, wire the switch so that a cable break or power loss puts the plant in the safe state.

How should I use the two switch outputs?

A common arrangement is a warning and a trip: the first output raises an alarm as temperature rises towards the limit, and the second stops the pump, compressor or heater at the limit. The two outputs can also run simple two-stage control, for example starting one cooling fan and then a second. Set the points with enough gap to avoid frequent cycling.

Can the WiFi thermostat control a boiler as well as electric floor heating?

Yes, with different ratings. It can switch electric floor heating directly up to 16 A. For a water heater, water boiler or gas boiler, the thermostat switches the heater's control circuit at up to 3 A rather than the heating load itself. For larger electric loads, use a contactor controlled by the thermostat.