Reed Switch Sensor Circuit

Capacitive loads as low as 50 pf which could even be caused by the wiring between the reed switch and the load could enough to reduce the life.

Reed switch sensor circuit.

In case a capacitor is connected in series or in parallel with a reed switch in a closed circuit the inrush current which flows during charge and discharge of the capacitor will cause deterioration of the reed contacts. The reed switch is an electrical switch operated by an applied magnetic field it was invented at bell telephone laboratories in 1936 by walter b. A spring makes it pop back out again when you take your finger away. Simply put it is a magnetic switch.

Reed sensors can be used in many applications where contactless on off is required. A reed switch is a sensor that closes the circuit in the presence of a magnetic field. There are normally open reed switches and normally closed reed switches. What problem do reed switches solve.

A reed switch is a very basic 2 lead switch that is switched on by a magnet being brought into the vicinity of the switch. How to build a reed switch circuit. Reed switches and reed sensors are used along with resistors or special reed sensors with integrated resistor to give out a potentiometric feed back across two outputs as a foamed magnetic float moves along the pcb s length. In its simplest and most common form it consists of a pair of ferromagnetic flexible metal contacts in a hermetically sealed glass envelope.

A push to make switch makes a connection and completes a circuit when you push it in. There are 2 basic types of reed switches. However reed switches can be fragile to use directly hence this module can make it easier to handle and mount the sensor in various applications.