Which type of fan control operates based on temperature?

Bimetal control operates by utilizing a bimetallic strip, which is composed of two different metals that expand at different rates when heated. This characteristic allows the strip to bend with temperature changes, thus activating or deactivating the fan based on the temperature it senses. As temperatures rise, the bending of the bimetallic strip will cause it to connect or disconnect a circuit, turning the fan on or off accordingly. This type of control is particularly effective for applications requiring straightforward temperature regulation, making it a preferred choice in situations where fan operation needs to correlate with temperature levels effectively.

Other types of controls, such as timed or manual control, do not inherently adjust based on temperature changes. Timed control operates on a pre-determined schedule, regardless of the actual temperature, while manual control requires human intervention to operate, also not linked directly to temperature measurements. Electronic control may use sensors or complex algorithms to adjust based on temperature, but it does so through electronic means rather than the mechanical properties of materials like in bimetal control.