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SWI TS01E Series | Fixed Set-Point Temperature Switch

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Sensors and Switches are mechanical-type sensing devices that do not require power to operate. Engineered based on time-proven principles such as buoyancy, conductivity, magnetic latching, capacitance and more, SWI sensors and switches are manufactured to provide reliable industrial process measurement year after year. Click on a sensing device below to learn more about our available sensors and switches product line.

SWI TS01E Series | Fixed Set-Point Temperature Switch


The TS01E Series Temperature Switch is designed to integrate to independent relays that change states using fixed temperature points within one device. The TS01E serves as an electronic thermostat control with probe mounted thermistors that sense the change in temperature within the media. In addition, the unit contains no mechanical components that can cause delay or chatter during operation. The TS01E is comprised of 316 stainless steel and is made to order in 1/4", 1/2" or 3/4" NPT mounting connections.

Principles of Operation

As the process temperature changes, the single or dual thermistors contained within the probe change resistance. The variation is compared to the factory set switch points and results in the changing state of relays. The differential between the relay states has sufficient hysteresis to avoid chatter during temperature transients.

SWI TS01E Series


  • Single Piece Assembly
  • Four Integrated Temperature Set Points
  • Horizontal or Vertical Mounting Orientation
  • Robust & Accurate Embedded Electronics
  • No Calibration Required
  • Fast, Responsive and Accurate Temperature Control
  • No Moving Parts


  • Fuel Tanks
  • Chemical Processing Tanks
  • Generators
  • Pump Control and Protection
  • Combustion Fluid


  • Input: 12 to 24 VDC
  • Output: Two Independant Relay Outputs

    Min: -20 °F ±10 °F (-29 °C ±-12 °C)

    Max: +250 °F ±10 °F (+121 °C ±-12 °C)

  • Power Consumption: 50 mA

  • Repeatability: > 96%

  • Response Time: < 1 Second

  • Warm-up Time: < 3 Seconds


  • Ambient Temperature: -65º to +225º F (-54º to +107º C)
  • Process Temperature: -45º to +275º F (-42.8º to +135º C)
  • Process Pressure: 1,000 PSIG (68.9 bar)
  • Construction Material: 316L Stainless Steel

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Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


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