Wired Magnetic Contact Switch | for doors or windows

Wired Magnetic Contact Switch | for doors or windows

A Wired Magnetic Contact Switch (often called a reed switch) is one of the most fundamental, reliable, and widely used components in security and automation systems. They are primarily used to detect the opening and closing of doors, windows, gates, or drawers.

Structure and operation of a wired magnetic contact switch

A standard wired magnetic contact set consists of two separate, non-electrical pieces:

• The switch (wired): inside this housing is a reed switch, which contains two thin, flexible metal reeds (ferromagnetic blades) sealed inside a glass capsule. This is the half that connects to your security control panel or automation hub via wires.
• The magnet (wireless): a simple permanent magnet enclosed in a matching housing. It requires no wiring.

When the door/window is closed: the magnet is positioned directly adjacent to the reed switch. The magnetic field pulls the internal metal reeds together, completing the electrical circuit. In standard security setups, this is known as a normally closed (NC) circuit.

When the door/window is opened: As the magnet moves away, the magnetic field breaks. The internal reeds spring apart, breaking the electrical circuit. The control panel detects this drop in continuity and triggers an alert or action.

Specifications

• Operating gap (switching distance): 15-25 mm
• Wiring configurations: 2-wire (standard loop configuration)
• Cable length: 4.8 meters

Typical applications (not limited to)

• Home automation
• Security system

What is in the box?

• 1 x Wired Magnetic Contact Switch