Honeywell Sensor in a Switch Thermal Switch with Internal Temperature Sensor honeywell.com/aero

Honeywell Space-Saving Sensor in a Switch

Space Rated Thermal Switch with Internal Temperature Sensor


Combines MIL-PRF-24236 or S-311-641/03,-04 thermal switch with IEC60751 thin film platinum resistance temperature detector in a Custom Package

Many designs can be packaged to include a sensor with a thermal switch. From fire protection too wind shield temperature control, this is a competitive advantage to the end user. This design is at the forefront of diagnosing thermal management success based on facts rather than elapsed time on a calendar. An over-temperature indication requiring actions effecting service, estimates of thermal effects on orbit, or taxiing down a runway to simulate a condition in flight are poor substitutes for data.

The Platinum Resistance Temperature Detector can be packaged with many thermal switches, either internally to the switch mechanism, internally to a custom switch mechanism, and/or externally in some instances.

The advantages of this approach are as follows:

  • Co-location of the sensor and switch reduces the need to infer (guess) what is thermally happening at the location of the switch relative to the location of the sensor.
  • The ability of the switch to do the operation at load is unaffected by the sensor and the sensor is unaffected by the switch.
  • Dual redundancy in one device using different technologies provides a here to fore nonexistent level of reliability. The decision is no longer either/or.
  • The switch may be selected as primary operating mechanism and the sensor used for data collection and/or process monitor.
  • The sensor can be used as the primary operating device and the switch as a fail safe.
  • The effects on the switch packaging are different with each approach.
  • The Sensor packaged inside a 700 series Thermal Switch adds two additional terminals to the device.

Contact us to receive assistance in creating "ordering codes", temperature matching of primary and secondary temperatures, and useful information on application optimization as well as information on the device.

THERMAL SWITCHES exported from the United States must be done in accordance with the Export Administration Regulations (EAR) and/or the International Traffic in Arms Regulations (ITAR) as applicable.

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