Bimetal Discs

Snap-Action, Automatic Reset Thermal Discs

Image; a bimetal disc diagram showing the bevel of a disc switch from concave to convex at a given temperature as a means of opening or closing access to a valve.

A bimetal disc opens/closes a port at a specified temperature.
It is both a sensor and actuator, saving cost and space.

Standard Part Availability

0.500" - 0.625" - 0.750" - 1.000"
Trip or reset between 20°F (-7°C) and 300°F (150°C)
a bitmetal disc is both a sensor and an actuator.

Unique Part Availability

bitmetal discs come in a variety of sizes

Common Uses

Lead Time

Typically 4 to 6 weeks; all parts manufactured domestically, allowing for shorter lead times for U.S. based manufacturers.


Prices vary based on volumes and tolerance ranges.

Also, the following release quantities represent price breaks:

100 - 250 - 500 - 1000 - 2500 - 5000 - 10000