Liquid Expansion Temperature Controller Jaye Heater's Liquid Temperature Controller is designed for heating equipment that needs simple and reliable temperature regulation. With a sensing bulb connected by a flexible capillary tube, it detects temperature changes and automatically switches the...
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Capillary Temperature Controller is designed for heating equipment that needs simple and reliable temperature regulation. With a sensing bulb connected by a flexible capillary tube, it detects temperature changes and automatically switches the heating circuit according to the preset temperature.
Its straightforward mechanical design makes it a practical choice for ovens, fryers, water heaters and various other heating appliances.
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Product Name |
Capillary Temperature Controller |
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Designed temperature range |
-35°C ~ 320 °C other temperature range can be customized. |
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Electrical properties |
16(3)A/30A-250V~10(1.8)A-400V~ |
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Capillary length |
300mm to 3000mm. |
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Material of Capillary and Sensing Bulb |
Stainless Steel and Copper optional |
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Diameter of Sensing Bulb |
3mm,4mm,5mm,6mm |
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Material of Terminal |
Brass |
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Wiring Diagram |
Single Pole Single Throw (SPST) |
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Mounting Hole |
2-M4 |
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Center of Mounting Hole |
28mm |
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Min. Capillary Bend Radius |
5mm |
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Operating life |
≥ 100,000times |
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Insulation resistance |
≥100MΩ |
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Electric strength |
AC2000V/1min |
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Contact resistance |
≤50MΩ |
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Temperature response rate |
≤1.0 ℃ /min |
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Applications |
Oven, griddle, fryer, heater, boiler etc. |
The main components include a sensing bulb, capillary tube, temperature adjustment mechanism, and electrical contacts.
The sensing bulb is installed close to the area where temperature needs to be monitored. As the temperature rises, the liquid inside the sensing system expands and generates pressure. This pressure is transmitted through the capillary tube to the thermostat mechanism.
When the preset temperature is reached, the electrical contacts switch to control the heating element. As the temperature falls below the set point, the contacts return to their original position and allow heating to resume.
This mechanical control method does not require a separate electronic temperature sensor or control board, making it suitable for many conventional heating applications.

01
Reliable Temperature Control
Helps maintain the desired heating temperature with stable mechanical control.
02
Flexible Capillary Design
Allows the sensing bulb to be positioned according to the equipment structure.
03
Multiple Configurations
Available with different temperature ranges, capillary lengths, terminals and mounting options.
04
Wide Application Range
Suitable for ovens, fryers, water heaters and various heating equipment.

Capillary temperature controllers are commonly used in equipment where direct and reliable temperature regulation is required.
In commercial ovens, the sensing bulb can be positioned inside the heating chamber while the thermostat body remains outside the high-temperature area. The controller switches the heating element according to the preset temperature.
For deep fryers, accurate temperature control is important for maintaining the desired oil temperature. A capillary thermostat can monitor the oil temperature and control the heating element accordingly.
Capillary temperature controllers can also be used in water heating equipment. The sensing bulb detects water temperature and helps prevent continuous heating after the preset temperature has been reached.
They can be integrated into various industrial and commercial heating systems where a simple mechanical temperature control solution is preferred.

It is a mechanical temperature control device that uses a sensing bulb and capillary tube to detect temperature and switch the heating circuit at a preset temperature.
They are commonly used in ovens, fryers, water heaters, heating equipment, and other temperature-controlled appliances.
Yes. The temperature range and other specifications can be customized according to the application requirements.
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