November 2026
SH-3WD NO & NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor for Roller Shutter
A heavy duty magnetic contact with a metal housing and 15 inch stainless steel armoured cable, with a large gap of over 40 mm. It has 3 wires so you can use it as normally open or normally closed. Buy it for roller shutters, garage doors and gates on a burglar alarm.
Specifications
| Model | SH-3WD |
|---|---|
| Contact | 3 wires, NO and NC |
| Operating distance | More than 40 mm |
| Housing | Heavy duty, high strength metal |
| Cable | 15 inch stainless steel armoured cable |
| Use | Roller shutters, garage doors, gates, home burglar alarm systems |
Frequently asked questions
The sensor has 3 wires so you can choose a normally open or a normally closed connection.
The operating distance is more than 40 mm, so it suits most garage doors, roller shutters and gates.
Yes. It has a heavy duty, high strength metal housing.
The cable is 15 inch (about 380 mm) stainless steel armoured cable, which protects the wires.
On roller shutters, garage doors and gates, as part of a home burglar alarm system.
The SH-3WD is the heavy duty contact for shutters with a gap over 40 mm. The MC-3T is a small plastic reed switch with a 15 to 25 mm sensing distance.
It is wired, with 3 wires for NO and NC connection.
It works with a gap of over 40 mm, which suits most garage doors, roller shutters and gates.