In a deep fryer a single or double capillary type thermostat 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 type thermostat 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. Click on the diagram below for more information.
Manual or Automatic Reset Capillary Switches
Capillary switches can be a manual reset requiring human intervention, or automatic. The better quality capillary type thermostats, such as ours, can be ambient temperature compensated. The less expensive ones are not.
For more information on our bulb and capillary switches, click here to visit the product page.
If you have a similar unit that needs a temperature control, click here to contact our inside sales team.