Mercury Switch

Mercury switches are a type of electrical switch that uses the element mercury to make or break an electrical connection. They are commonly used in various applications, including tilt sensors, level sensors, and vibration sensors.

Mercury switches consist of a sealed glass tube containing a small amount of mercury and two or more electrical contacts. When the switch is tilted or moved, the mercury inside the tube flows and makes contact with the electrical contacts, completing the circuit. When the switch is returned to its original position, the mercury recedes, breaking the circuit.

These switches are known for their reliability and durability, as they have no mechanical parts that can wear out or become damaged. However, due to environmental concerns and the toxicity of mercury, the use of mercury switches has been restricted or banned in many countries.

In the supply class "Switches" and the supply group "Electrical And Electronic Equipment Components," mercury switches would be categorized as a specific type of switch within that group.