YwRobot Reed Switch Magnet Sensor Module

Description
Reed switch is a kind of passive electronic switching component with contacts with a simple structure, small size and easy to control. 
A Reed Switch Module is a magnetic sensor that is normally open and gets closed when exposed to a magnetic field. The reed switch must work together with the magnet, when it detects magnetism, then the circuit connects and the module outputs a low level; when there is no magnetic force it is disconnected and the module outputs a high level.

Features
Voltage: 3.3V, 5V
Output Type: Digital
Interface: Arduino 3P Interface SVG
Sensor: Russian Imported Reed Pipe, Plastic Anti-Drop
No magnet remains high, there is a low magnetic output 
With LED Output Indication
Size: 29mm x 24mm

Applications: Position, Speed Detection, Safety Alarm Device, Textile Control System