Mercury tilt switch

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mercury tilt switch, a type of electrical switch that opens or closes a circuit based on the tilt angle of the device.
Function: It contains liquid mercury inside a sealed glass tube; when tilted, the mercury moves to connect or disconnect metal electrodes, making or breaking the electrical circuit.
Common Applications: Historically, these were frequently used in older thermostats, vending machines, security alarms, and industrial machinery to detect position, vibration, or shock.
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