Reed Switch Sensor Circuit

Reed sensors can be used in many applications where contactless on off is required.

Reed switch sensor circuit. What problem do reed switches solve. 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 contacts are usually normally open closing when a magnetic field is present or they may be. 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.

How to build a reed switch circuit. A spring makes it pop back out again when you take your finger away. There are normally open reed switches and normally closed reed switches. Simply put it is a magnetic switch.

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. 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. A push to make switch makes a connection and completes a circuit when you push it in. A reed switch is a sensor that closes the circuit in the presence of a magnetic field.

A reed switch switches a current on the same way but a magnet provides the pushing pressure instead of your finger. 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. There are 2 basic types of reed switches.