Magnetic contact recessed normally open NO detector opening door window sensor 1 pair NO type wired window magnetic contact sensor detector window sensor magnetic switch home alarm system 1 pce switch (no type, when open, R = 0) specification: Working Principle: The magnetic is made of two parts: one part is a permanent magnet and another part is a reed switch normally, when the permanent magnet close the reed switch (less than 5mm), the magnetic sensor works at the workstation (short circuit). when the magnet separates, it is a normal open state. metal ABS fire shield connection mode: NO (open is short circuit R = 0) rated current: 300 (mA) rated voltage: DC5-48 operating distance: 15 ~ 20mm power: <10 (W) Dimension: 17 * 11mm (LxD) Application: access control, alarm system
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