This vibration detector is is designed for protection against forced entry by a hammer, saw, crowbar, etc. through walls, ceilings, windows, safes, cabinets, etc. For use in closed-circuit alarm systems, the detector will initiate an alarm when a vibration of considerable force strikes the protected surface. A built-in tamper switch is independently wired from the vibration detector for enhanced security. The detector has pure-silver contact points, adjustable sensitivity, and tamper-proof cover. Contact rated 1.0A@50VDC. White. Features For use in closed-circuit alarm systems Pure silver contacts with gold plating to ensure reliable and long-term operation Ideal for protecting glass windows, showcases, solid walls, ceilings, safes, cabinets, motorcycles, skylights, etc. Small size for discreet installation Built-in tamper switch provides enhanced security Adjustable contact pressure for different surfaces Detects a vibration/shock on protected surface and activates an alarm Instructions Specifications Circuit Type: N.C., momentarily open when activated Contact Pressure: Adjustable from 1 to 50 grams but recommended setting between 5 and 25 grams only. Supplied with pressure of approx. 6 grams Current Rating: 1A@50VDC Break Time: Approx. 45 ms max. (at 6-gram pressure) Estimated Life: Over 100,000 cycles Contact: Silver with gold plating Case: ABS resin Dimensions: 60 x 21 x 15mm Weight: 20g