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

Diameter:: 0.500" - 0.625" - 0.750" - 1.000"
Temperatures:: 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

Can supply any diameter between 0.5" and 1.5"
Can supply holes in the disc in any size, location and quantity

bitmetal discs come in a variety of sizes

Common Uses

Valves: port water, fuels or gases.
Electrical Connections: close/open contacts at a specified temperature.

Lead Time

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

Pricing

Prices vary based on volumes and tolerance ranges.

Also, the following release quantities represent price breaks:

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