When it comes to your HVAC system, selecting the appropriate temperature switch is important for both efficiency and safety. At Senasys, we offer a diverse range of temperature switches, including TC switches (Firestat), bulb and capillary thermostats, bi-metal snap action switches, and micro snap action switches. Here’s a breakdown of each type to help you make an informed choice.

Temperature Switches for HVAC Systems

Senasys provides a broad selection of temperature switches designed specifically for HVAC applications. These include bulb and capillary thermostats, bi-metal snap disc thermostats, and duct limit switches. They play a crucial role in regulating system functions, such as activating fans or other components when designated temperatures are reached.

Stemco 358E-144 Capillary ThermostatBulb and Capillary Thermostats

Bulb and capillary thermostats are essential for precise temperature regulation in HVAC systems. They serve as limit or control devices, ensuring that your system operates within safe temperature ranges. Senasys offers these thermostats in both adjustable and fixed temperature settings, catering to a wide array of HVAC needs.

To learn more about our selection, visit the product page.

Duct Limit SwitchesDuct Limit Switches

Our TC Adjustable Limit Switches, known as Firestats, are designed to safeguard your HVAC system by shutting down equipment when air temperature exceeds preset limits. This prevents overheating and potential damage. Additionally, we are developing a duct fan switch that will activate HVAC equipment like fans or blowers when temperatures rise beyond a set threshold.

For more details on our duct limit switches, visit the Firestat product page.

Bi-Metal Snap Disc ThermostatsBi-Metal Snap Disc Thermostats

Senasys’ bi-metal snap disc thermostats are reliable thermal sensors used in a variety of applications, including room heaters, space heaters, air conditioning systems, and wood stoves. We offer these thermostats in several configurations:

  • Automatic Reset: Resets automatically once the temperature normalizes.
  • Hermetically Epoxy Sealed: Ideal for harsh environments requiring robust protection.
  • Manual Reset: Requires manual resetting to resume operation.
  • Single Shot: Designed for single-use scenarios where permanent shutdown is necessary.

Explore the full range and specifications by visiting the snap disc product page.

Why Senasys?

With decades of experience, Senasys is dedicated to providing high-quality temperature control solutions for HVAC systems. Every product undergoes thorough testing to ensure top performance and safety. For custom solutions and OEM pricing tailored to your specific requirements, reach out to our expert team.

Send us your application details today!

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.