Refrigeration temperature control

When you have an application that uses a chiller such as a refrigeration unit or an air conditioner you may experience frost build up if the equipment is over worked. Most units will use a chiller sensor, such as a capillary thermostat for refrigeration control. The temperature sensor is mounted externally and when the bulb of the capillary is cooled the contacts open shutting down the compressor. Once the frost or cooled condition has dissipated the equipment will return to normal operation.

These pieces of equipment may also use a second chiller sensor such as a capillary calibrated at a temperature to prevent the chiller or compressor from coming on even when called for from a thermostat control. An example would be an air conditioner operating at an outdoor temperature below 50°F.

The better quality capillary sensors, such as ours, can be ambient temperature compensated.

Capillary Thermostats351-254327, Capillary Thermostat, Stemco, Senasys

Senasys offers a wide range of single pole, double throw capillary thermostats. Available field adjustable or fixed, the capillary thermostats can be manually or automatically reset. These high limit switches are highly versatile, carrying up to 30 amps. The capillary thermostat has a temperature range of 0°F-700°F, with a maximum ambient temperature up to 250°F.

For more information about our capillary thermostats, click here to visit the product page.

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Bulb & Capillary Thermostats

Original equipment manufacturers worldwide use thermostat switches designed and manufactured by STEMCO, a Division of Senasys. No matter which style or model you choose, all of the capillary thermostat switches operate using the same physics. A fluid is encapsulated in a metal and when the temperature changes the fluid either expands or contracts. This fluid change moves a diaphragm which is in touch with a snap action switch and either opens or closes a circuit.

Ambient Compensation

Our capillary thermostats can be ambient compensated to offset the differential in temperature which keeps our thermostat controls more accurate as it’s environment changes.

Custom Options

Capillary thermostat switches built by Senasys can also be built to customer specifications. This insures you get the exact control you want without paying for features you don’t need.