![](https://www.vernet-group.com/wp-content/uploads/2020/02/actuator.png)
The expansion & contraction of these thermal actuators can be utilized to operate a valve, mechanical linkage, electric switch, or any other device. The plug and diaphragm type are proven to be the most reliable style for any application.
![](https://www.vernet-group.com/wp-content/uploads/2019/12/avionics-0.png)
![](https://www.vernet-group.com/wp-content/uploads/2019/12/as9100.png)
Thermal actuators extend a piston upon temperature increase without the need for any external power source.