This magnetic door switch is perfect for security setups - it's a normally open (NO) type, meaning the circuit completes when the magnet separates (like when a door opens). The actuation distance is 40-50mm, and it handles up to 0.5A current, 100V DC, and 10W power. The housing is zinc alloy with a stainless steel pipe, so it's rust-resistant and durable. Comes with 50cm long wires that are 22AWG thickness. Installation is simple - just screw it into place. Great for home security systems, garage doors, industrial warehouses, shops - anywhere you want to monitor if a door or window is opened. When the magnet is close, circuit is open; when separated (door opens), circuit closes and triggers your alarm. Package includes the switch plus 4 screws for mounting. Much more reliable than cheaper sensors, and the zinc alloy construction means it'll last through weather and wear. Solid basic security for not much money.
Free 30-day returns 
Free 30-day returns
