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Thermostats for Commercial Kitchen Equipment: Capillary, Bimetal and Limit Thermostats Explained

Maintenance & Spare Parts · 25 October 2026 · 1 min read

Thermostats for Commercial Kitchen Equipment: Capillary, Bimetal and Limit Thermostats Explained

The thermostat is the brain of every heated machine. If it drifts, fryers burn oil, ovens bake unevenly and tea boilers overheat. Here is how the main types differ.

Adjustable Gas-Filled Thermostat EN-T09 (50-300 °C)
Adjustable Gas-Filled Thermostat EN-T09 (50-300 °C) · View product

Capillary (gas-filled) thermostats

A capillary thermostat senses temperature at the end of a thin tube and switches the load. Our adjustable gas-filled thermostat covers 50 to 300 degrees Celsius, suited to fryers, toasters and ovens. TECASA models include:

Three-phase and fryer thermostats

Large fryers use three-phase versions such as the double-tail fryer thermostat or the 200-300 °C three-phase thermostat.

TECASA Safety Thermostat EN-017 (100-230 °C)
TECASA Safety Thermostat EN-017 (100-230 °C) · View product

Safety and limit thermostats

A safety thermostat (100-230 °C) or a limit thermostat (50-165 °C, with reset models) cuts power if the temperature runs away. Fit one wherever overheating is a risk.

Indicators and thermometers

How to match your thermostat

  1. Temperature range and electrical rating
  2. Capillary or probe length
  3. Mounting style and shaft
  4. Single-phase or three-phase

See all thermostats and temperature controls or send us a photo.

Frequently asked questions

What does the temperature range mean?

It is the lowest and highest temperature the thermostat can be set to, for example 50 to 300 degrees Celsius.

What is a limit or safety thermostat?

It cuts the power if the temperature gets too high, protecting the equipment and the oil or water inside.

How do I measure the capillary length?

Measure from the thermostat body to the end of the sensing bulb or probe.

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