5 pair MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System Detector

Specification: Brand new Color: white Material: ABS Dimension: approx. 27 x 14 x 8(mm) Switch pattern: N/C normally closed,, alarm-on-broken Voltage: 100V DC Rated power: 10W Actuation distance: 15-25mm Wire lead: 24 Awg, about 350mm long Mounting method: SMD (by screws or double-sided tapes) Recommendations in application: wooden door, window Features: Easy installation Reliable performance Good characteristic of abrasion-proof Best Choice for you to protect family There are two types of reed switches: ''normally open'' reed switches and ''normally closed'' reed switches. The metal reeds on a normally open switch stay open when there is no magnet near the switch. In the presence of a magnetic field, the contacts of a normally-open reed switch will close. A normally-closed reed switch is closed when it is not near a magnet; as a magnet is brought close to it, a normally-closed switch will open Package included: 5 pair x door magnets ( note: packaged doesn't included screws )