STEMCO Capillary Switch

Capillary & Bulb Thermostat Switches, Probe Thermostat Switches

Original equipment manufacturers worldwide use thermostat switches designed and manufactured by Senasys Inc. 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.

Commercial food equipment manufacturer’s incorporate Senasys’ high quality, UL approved thermostat switches and control. Other important applications are pool and spa, HVAC equipment and products for the home.

Product line
  • Bulb and Capillary Thermostats
  • Probe Style Thermostats.
  • Ambient Compensated Options
  • Thermowells & Enclosures
  • Digital Switching Solutions
Customized to manufacturer specifications

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. Please contact our direct sales support to receive information on any of our switches.

Made in the USA

Senasys takes pride in quality control and reliable operation of our components.

Products are designed, manufactured, tested and shipped from Senasys’ facilities in Eau Claire, WI to clients across the globe.  Every switch is individually 100% tested before it leaves the plant.