Capillary Switch in Fryer

Capillary Switch Works as a Control and Limit

Capillary Switch in Fryer

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In a deep fryer a single or double capillary may be used. The bulb portion of the capillary is made of Stainless steel or a plated copper and is immersed directly into the fluid being heated. One capillary may be used as a control switch turning the heating elements on and off at pre-set or adjustable temperature.

Many fryers use a second capillary switch as a limit to prevent the heating elements from a runaway condition causing the heated medium to overheat and burn. The capillary switch can be a simple probe type with the diaphragm connected directly to the switch. Or it can be a bulb and capillary type so the contacts portion can be located a distance away from the immersed bulb.

Capillary switches can be a manual reset requiring human intervention, or automatic. The better quality capillary thermostat switches, such as ours, can be ambient temperature compensated. The less expensive ones are not.

To view our standard capillary switch options, visit our website.

For more information about our capillary switches contact our direct support at 715-831-6353.

Learn more about capillary switches. Contact us about capillary switches.


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