Mini Magnetic Reed Module (Arduino-Compatible) (2 Pack)
A reed contact switch is a normally open contact which closes in the presence of a magnetic field. This modules contains a 10K ohm pull-up resistor. These types of sensors are found in window and door alarm systems with magnetic proximity sensors.
Specifications
Voltage : 5 VDC
Connection: 3 pins, +(middle pin), ground and DO (data out)
Size: 0.98" x 0.59" (25 x 15 mm)
Weight: 0.07 oz. (2 g)
Whadda is a Premium Maker Brand by Velleman Group that produces electronics projects for enthusiasts.