Line Voltage Thermostats Control Heat Source

Our HVAC line voltage thermostat products are commonly found in industrial, agricultural and commercial settings to monitor air temperature. The thermostats are either hard wired directly, or use a piggyback plug, to a heat source.  When the air temperature falls within the determined environment, the line voltage thermostat coil senses the temperature change. This in turn triggers the thermostat to operate the heater to eliminate the  freezing temperatures. As the air temperature rises during heater operation, the thermostat returns back to normal. When it does, its will begin shutting the heater down again until temperature falls.

TP 501 two stage thermostat

To have the most accurate temperature reading, it’s best to mount your HVAC line voltage thermostat 5-6 feet above the floor. The reason this is the best location is because it will be exposed to the average temperature of the controlled space. Areas you should not mount the control is where it could be affected by unusual heat or cold temperatures, such as in sunlight, near an entry way, or outside wall.

Tempro thermostats are available with an extended bulb to sense a remote location. These include areas such as for outside air temperature, where the control is located in a safe operating environment. To view more detail on our line voltage thermostats, click here.


Talk to a product specialist today!

Thermostats & Guards

Tempro offers line voltage thermostats & guards commonly found in commercial, industrial and agricultural settings.

Custom Options

Variety of custom options available in both thermostats & guards, such as, temperature ranges, materials, size & private branding.


Tempro products meet NEMA, UL, cUL & NEC 457 Ag-ratings.

High Quality

We take pride in quality control & reliable operation of our components. Every switch is individually tested before it leaves the plant.

Stocked in the U.S.A.

Products are designed & shipped from our facilities in Eau Claire, WI to clients across the globe.