A Reed contact switch is a normally open contact which closes in the presence of a magnetic field. This modules contains a 10 Kohm pullup resistor. voltage: 5 VDC connection: 3 pins +(middle pin) ground and DO (data out) dimensions: 25 x 15 mm weight: 2 g

Specifications

• Voltage : 5 VDC
• connection: 3 pins +(middle pin) ground and DO (data out)
• dimensions: 0.98 x 0.59 (25 x 15 mm)
• weight: 0.07 oz. (2 g)