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Seismic Cutoff Switch
Inductive proximity switches are used to detect the presence of metallic objects without actually contacting the object.Their high-speed switching and small size make them indispensable in automation applications. Inductive proximity switches consist of a coil driven by an oscillator. The oscillator creates an electromagnetic field which appears at the active face of the switch. If a metal target enters this area, the electromagnetic field is reduced and the switch turns on or off. PDF
Remote Control Earthquake Switch or Seismic Smart SwitchAlpha Sales has developed a homeowner and industrial seismic switch. Home owner version triggers an alarm for the occupant, and may be programmed to turn off power, turn off fluids with Solenoid valves, turn on battery emergency lights, turn on backup equipment, open doors, etc. Industrial Seismic Cutoff SwitchFor industrial use this switch can be programmed to have motors shut off pipelines, start emergency generators, turn off critical equipment to avoid spills or damaged products.
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