Sensors are used to detect flap and latches and other moving objects. The sensors respond to the magnetic field, which means that the countercurrent of the sensor must be the source of the magnetic field, magnet or electromagnet. The advantage of magnetic sensors is in the throughput of the magnetic field through other materials.
Sensors can be manufactured in very small diameters from 6.5mm with high sensitivity up to 60mm. The sensing distance affects the force of the magnet.
Magnetic sensors are suitable, for example, for sensing piston positions in pneumatic cylinders. The fact that the magnetic field passes through the non-magnetic metal allows the sensor to identify the position of the piston provided with the permanent magnet over the aluminum wall of the pneumatic cylinder.
All commonly used designs of permanent cylindrical magnets of varying intensity can be detected.