Industrial Air Heaters, Radiant Heaters, Flexible Heaters and small furnaces

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Thermocouples and Infrared Temperature Sensors (Pyrometers)

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PID Temperature Controllers, On/Off Controllers or Thermostats, recorders

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Electromechanical Relay, Solid State Relays (SSR) and SCR Power Controllers

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Tool Room / Laboratory Furnaces (Hardening, Tempering, Assaying), Optional Inert Atmosphere Gas Package


Welcome to DeltaT 

As a supplier to "mission essential" prime vendors to US government agencies, DeltaT will complete all contracts, including all associated support functions.

During COVID-19 virus outbreak, we are operating with limited "essential" staff on site, with most of our engineering and office personnel working remotely.

If you have any questions, concerns, requests for orders or need assistance please send an email to or your existing DeltaT Contact email and we will get back to you at our earliest opportunity.

Thank you for your understanding.
Reto Fehr, President


Delta T was established in 1991 and specializes in industrial heating applications including:


Where Delta T can help you:


Our main focus is on:

  • Different methods of temperature controls (on/off, PID controller, recording)
  • Different power switching methods like mechanical relay, solid state relay (SSR) or silicone-controlled rectifier (SCR)
  • Process heaters, air heaters, infrared heaters, flexible heaters, infrared heating systems
  • Different contact (thermocouple, RTD, Thermistor) or non-contact (Pyrometer, Spectralmeter, Infrared Thermometer) temperature sensors
  • Energy saving through the best choice of heating method and insulation.
  • Engineering and manufacturing complete turn-key solutions (including heater, temperature sensortemperature control and power switching) for your industrial heating applications. 

Authorized Representative & Distributor in Los Angeles, California for
Control Concepts Williamson Corporation
Control Concepts for
AC and DC SC Power
Williamson Corporation for Industrial Non-contact Temperature Application and Infrared Thermometers