Senasys manufactures a line of firestat adjustable duct limit temperature switches. The adjustable temperature duct limit switch features a helix bi-metal element that senses rapid increases in temperature, such increases often caused by fire in a HVAC duct system. The duct limit switch operates a single pole, single throw (SPST) switch that opens when temperature rises. The adjustable duct limit switch can be set by the operator to sense 100°F to 250°F. The enclosure has an ambient temperature of -40°F to 190°F. And the element’s ambient temperature is 350°F.
The duct limit switch is supplied with a manual reset lever, which requires human intervention to reactivate the limit switch after the high temperature condition has cleared.
Firestat adjustable duct limit temperature switches are installed in air ducts to shut down HVAC equipment when air temperature exceeds a pre-set limit. These duct high temperature limits are indispensable in specialized HVAC applications and Building Automation Systems.
These Firestat duct fan and limit switches are installed in air ducts to shut down heating, air conditioning and ventilation equipment when air temperature exceeds a pre-set limit. Our CEMCO [...]
The main safety benefit of installing a Firestat limit switch into your duct system is to prevent the spread of fire and smoke in the event of a building fire. [...]
If you’ve looked at temperature switches before, you’ve most likely heard the term “Bimetal”. But what does that mean? Well, I’m glad you asked. The way Bimetal works is that [...]
Our Firestat switches come in both adjustable and fixed temperature models. However, you may not know what temperature you need in the first place. The temperature you’ll need your Firestat [...]
Senasys acquired the CEMCO TC duct limit switch product line in 2014. Many of our other switching products sense air or surface temperature making this product line fit well within [...]
The TC duct limit temperature switch line manufactured by Senasys is an adjustable temperature switch that is a great solution for HVAC systems. Adjusting the switch is simple: Remove the [...]
There are two main types of temperature switches used in HVAC systems, fan switches and limit switches. Senasys currently only manufactures a duct limit switch, and we are in the [...]
Senasys manufacturers a large variety of temperature switches for HVAC systems: Bi-metal temperature switches Bulb and capillary thermostats Mechanical line voltage thermostats Switches found in HVAC systems are mechanical controls [...]
Many buildings require a high limit switch to prevent spread of fire or smoke. If the building uses an exhaust fan to maintain cooling, many building inspectors will require a [...]
Senasys, a leading sensor and switch manufacture, provides a variety of adjustable temperature switches for monitoring and controlling different heating elements. Duct Limit Control Bulb and Capillary Temperature Switches Line [...]