How does a snap action thermostat control temperature?

Snap Disc, or snap switch thermostats are bimetal mechanical thermostats that function via the thermal expansion and contraction of a bimetal disc that “snaps” from a convex to a concave shape at a set temperature. When the disc “snaps”, it either completes or interrupts a circuit.

What is a thermal snap switch?

What is a Thermal Cutoff Switch? A thermal switch is an electromechanical device which opens and closes contacts to control the flow of electrical current in response to temperature change. The term “Thermal Cutoff Switch” generally refers to how the switch is used, ie.

What are temperature switches?

Temperature switches are generally used in industry for limiting temperature. They monitor the temperature of machinery and equipment and, for example, switch off machinery if it overheats or switch on a fan to cool the equipment.

Why should a thermostat be snap acting?

Why should a thermostat be snap acting? Snap action of a thermostat is very important to ensure a good connection with the contacts. In early thermostats, the lack of snap action caused problems with switching from small temperature changes.

How does a snap switch work?

With a snap-action mechanism, the contacts will instantaneously switch at a specific stroke position without relation to the switch operating speed or operating force. As opposed to a snap-action mechanism, with a slow-action mechanism, the operating speed of the switch is always the travel speed of the contacts.

How does a temperature control switch work?

Q: How do temperature switches work? A: Temperature switches can be set to react to a certain temperature. When the sensing probe of the switch detects an increase of temperature, it opens the electric contacts. When the temperature decreases, the electrical contacts close ( source).

How do temperature switches work?

As the switch begins to increase in temperature, the bimetal heats up until it reaches the temperature where it deflects and thereby opens the electrical contacts. When the temperature decreases, the bimetal returns to its original shape and closes the electrical contacts.

What does a snap disc do on a pellet stove?

This part may be called a limit switch, snap switch, or snap disc. These temperature sensing switches serve as a safety feature and typically control auger motors, blowers, and other major components in your stove. Depending on the brand and model, you may have multiple high and/or low limit switches.

What is an important operating feature of a snap action micro limit switch?

The defining feature of micro switches is that a relatively small movement at the actuator button produces a relatively large movement at the electrical contacts, which occurs at high speed (regardless of the speed of actuation).

What is a snap switch used for?

A switch is a device used to open or close an electric circuit or to change the connection of a circuit. Basically, a snap switch consists of two or more contacts mounted on an insulating assembly and arranged so that they can be moved into and out of contact with each other by a suitable operating mechanism.