Feb 18, 2025
Capillary thermostats are commonly used in water heaters to regulate the temperature. They work based on the principle of a liquid-filled capillary tube and a sensing bulb that reacts to temperature changes. Here's a basic breakdown of how they function:
Temperature Sensing: The capillary tube is filled with a liquid (usually a special oil or alcohol). One end of the tube is connected to the sensing bulb, which is placed in contact with the water or heating element. As the temperature of the water increases, the liquid inside the capillary tube expands.
Movement of the Liquid: The expansion of the liquid pushes against the pressure inside the tube, causing it to move. This movement activates a mechanical mechanism inside the thermostat.
Switching Mechanism: The pressure from the expanding liquid triggers the thermostat's switch to either open or close. When the water reaches the desired temperature, the thermostat switches off the heating element to prevent overheating. When the temperature drops below a certain point, the thermostat switches the heating element back on to maintain the desired temperature.
Adjustability: Most capillary thermostats allow for temperature adjustment via a dial or screw, so you can set the temperature range according to your needs.
The primary advantage of capillary thermostats is their precision and reliability in controlling the temperature of water heaters, ensuring they operate efficiently and safely.
Previous: How does Capillary Temperature Controller work for Ovens & Stoves?
Next: What factors should you consider when selecting the right silicone heater for your project?
