This is the perimeter protection for the premises. The magnetic contact is usually installed in exterior opening doors and windows that are reachable from the ground (or from another part of a building which is accessible from the ground – such as a garage). The contacts operate on the principle that when the door or window moves more than 1/2″ from the frame, the magnetic field on the switch is removed and this breaks the alarm circuit (or zone) which trips off the system.
कृपया अजमेर से बाहर के मटेरियल के ऑर्डर उसी दिन डिस्पैच करवाने के लिए ऑर्डर एंड पेमेंट शाम 7 बजे से पहले कर देवे
