With HWG door contact you can find out, whether a door or window is opened or closed. It consists of a magnet switch and a magnet. If both parts a separated from each other, the magnet switch changes its state. Devices like Poseidon can register those changes and for example inform the responsible employee via Email.
Door contact MK4 is has 4 wires to meet certain security standards.
|Measuring tasks:||Door detector|