Ovikontaktit

Ovikontaktit, often translated as door contacts or magnetic reed switches, are simple security devices used to detect whether a door or window is open or closed. They typically consist of two parts: a magnet and a sensor. The sensor contains a reed switch, which is a small glass tube with two ferromagnetic contacts inside. When the magnet is close to the sensor, its magnetic field closes the contacts within the reed switch, completing a circuit. When the magnet is moved away, the contacts separate, breaking the circuit.

These devices are commonly integrated into home security systems. When a door or window equipped with an ovikontakti is opened, the magnetic contact is broken, signaling the security system. This signal can then trigger an alarm, notify a monitoring service, or activate other security measures. Their simplicity, reliability, and low cost make them a popular choice for basic perimeter security.

Ovikontaktit are also used in various other applications beyond security. For example, they can be used in industrial automation to monitor the position of machinery or in smart home systems to trigger lighting or other actions when a door is opened. Their operation is passive, meaning they do not require a power source to function, relying solely on the magnetic interaction between the two components. Installation is usually straightforward, involving mounting the magnet to the moving part of the door or window and the sensor to the stationary frame.