Abstract: This invention relates to multi purpose shock sensor being used as a vehicle burglar alarm and/or a security system for restricted area, which consists of a cap, a vibration sensing element, a sealed cavity, and a balance weight in the characterized that having a safety cover securely fixed and surrounded with the elastic cap, preparing a gap having a fixing surface and a free surface on inner peripherals of the safety cover, fixing a lid on the safety cover, forming a groove on a peripherals of a balance weight, forming a coupling hole on the center of the cap, and coupling the balance weight into the coupling hole in the top of the cap.