
SKU Code
SS0076
Availability
Categories
The MC-38 magnetic sensor (or MC-38 magnetic contact switch) is <mark>a wired reed switch and magnet pair commonly used for home security systems, doors, windows, and DIY microcontroller projects like Arduino</mark>. It triggers when the two parts are separated beyond a 15–25 mm actuation distance. [1, 2, 3, 4]