A Mercury Switch is an electrical switch that uses a small amount of liquid mercury to regulate the flow of power.
The switch is enclosed in a sealed glass tube to retain the mercury within and avoid oxidation.
Mercury Drop: A little amount of liquid mercury serves as the conducting element.
Electrodes/Contacts: Metal electrodes or contacts are located within the glass tube. When the mercury meets these connections, the circuit is completed.
Tilting: The switch works based on its orientation. When the mercury is slanted, gravity causes it to flow to the bottom.
Circuit Completion: Depending on the tilt angle, the mercury may contact the electrodes, shutting the circuit, or move away, opening the circuit.
Vibration Sensitivity: Some mercury switches can function as vibration sensors.
Durability: Because the contacts are encased, they are resistant to dust, oxidation, and other pollutants.
Reliability: Mercury's conductive qualities ensure a consistent and robust electrical connection.
Spark-Free Operation: Because the switch produces no sparks, it is safe to use in hazardous areas.