Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

TRS-W Thermal Reed Sensor



Temperature range of 25°C to 130°C. Less than 3°C tolerance. Normally Closed Contact. For Low level 10W loads.



Durable sputtered Ruthenium Contact. RoHS Compliant. Not ESD sensitive. Does not require power for operation.


These thermal reed sensors can accurately monitor temperature within 2-3C and are suitable for a wide range of applications. The load switching capability is that of the reed switch used, which is 10W. As these are a direct replacement to bimetallic strips, these Themal Reed Sensors are only available in a normally closed, form B type contact, which opens when the configured temperature is reached.


Contact FormB
Temperature Tolerance°C±3
Contact Rating (max)W/VA10.0
Switching Current (max)A0.5
Carry Current (max)A1.0
DC Switching Voltage (max)VDC180
AC Switching Voltage (max)VAC130
Breakdown Voltage (min)VDC200
Contact Resistance (max)150
Insulation Resistance (min)Ω109
Capacitance (typ)pF0.2


Operate Time (max)ms0.35
Bounce Time (max)ms0.30
Release Time (max)ms0.15
Resonance Frequency (typ)Hz>2000
Operating Frequency (max)Hz1
Operating Temperature Range°C-20 to Cutout +20
Shock Resistance (½Sin wave for 11ms)G30
Vibration Resistance (10-2000 Hz)G20

Ordering Code

TRS-W-(Cut out temperature)-(Cable length in mm)-(Cable Termination Code)

Cut-out Temperature Range°C25-130
Cable Termination CodeTermination Type
SStripped to 5.0 mm
TStripped and Tinned

TRS-W-25-1000-T denotes TRS-W Normally Closed Thermal Reed Sensor with a release of 50°C, having a 1000 mm cable length with Tinned cable ends.

Other Special Configurations: Lower Static Contact Resistance.

Usage Notes

Here are some of the recommended usage notes to ensure maximum durability of this product. The complete usage notes are available here.

Product Handling

Dropping Reed switch Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro...Continue reading ->

Ferro-magnetic parts

Ferromagnetic parts Using Ferro-magnetic mounting parts or screws within a 100 mm vicinity of a reed switch will...Continue reading ->

Cable Handling

Twisting cables nearer to housing Cables with higher strands should be used so that there is minimal work hardening...Continue reading ->

Reed Contact Protection Circuits

Inductive Load Protection Circuit When a reed switch is to be connected to an inductive load or a...Continue reading ->


Although we can never restrict the use of a reed sensor to a particular field, the following is a list of some of the applications that the TRS-P Thermal Sensor is known to perform well.

Thermal Reed Switches in Aquariums for controlling Water Temperature

Aquarium Temperature Due to their accurate temperature cut-in and cut-out, Thermal Reed Switches can maintain an...Continue reading ->

Thermal Reed Sensors for Sensing Temperature on Boats

Reed switches in finding boat engine temperature Thermal reed sensors can also be used in a variety of applications on boats...Continue reading ->

Thermal Reed Sensors in Automobile Temperature Sensing

Reed switches in temperature sensing Thermal reed sensors can be mounted on the engine block to sense high temperatures...Continue reading ->

Thermal sensors in Temperature control in deep freezers, coolers

Reed switches in deep freezers In deep freezers, coolers and heaters, the temperature needs to be maintained within a...Continue reading ->

Reed switches in Instant Water heaters and Power showers

Reed switches in instant water heater Instant Water heaters and power showers use reed switch based Flow switches to detect...Continue reading ->

Thermal Reed Switches in Rice Cookers

Reed switches in rice cooker heater control After rice has cooked, rice cookers need to keep the rice warm at say,...Continue reading ->
TRS-W Thermal Reed Sensor
TRS-W Thermal Reed Sensors: Normally closed, 10W, 20C to 150C, with cable, complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: TRS-W
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