ITEM NAME:Reed Sensor Magnetic Switch Module Normally Open Arduino AVR ATMega PIC Pi L4V3 Reed Sensor Magnetic Switch Module Normally Open Arduino AVR ATMega PIC Pi L4V3 A reed module is a magnetic sensor that is normally open and get closed when exposed to a magnetic field. Under normal.A reed module is a magnetic sensor that is normally open and get closed when exposed to a magnetic field. 1 Dry reed pipe sensor module. Under normal conditions the 2 plates do not touch creating an open circuit digital output 0 when the switch is placed in the range of a magnetic field the 2 plates are attracted to each other and touch closeing the circuit and giving digit output 1.
