The KY-021 Magnet Switch, also called Mini Magnet Reed Module Sensor, is an electronic component used to detect the proximity of magnetic fields. It consists of a reed contact mounted in a small housing and an integrated circuit that monitors the reed contact. The reed contact consists of two metal sheets enclosed in a glass tube. When a magnetic field is present near the reed contact, the metal sheets are attracted and touch, making electrical contact. This contact can be measured By a microcontroller or other control unit to detect the proximity of magnetic fields. The KY-021 can be used in various applications, e.g. in security alarm systems, in industry to determine the position of machine components or in robots to detect metal objects.
Universal magnetic switch (reed contact)
Operating voltage 3.3 V - 5 V
SKU: MSMMRMS-267
