2x magnetic reed switch normally open closed nc no door alarm window security magnetic door switch magnetic contact switch reed switch to dc 5v 12v 24v light black 4 2 out of 5 stars 9.
Garage door contacts closed circuits.
These contacts can be as far as 2 apart and still operate.
Customers who bought this item also bought.
Luckily they re small and pretty affordable.
I have two garage doors which means that i ll have two contact sensors one per door and i ll need control of two relays one for each opener.
When the magnet and sensor separate the circuit opens.
Heavy duty magnetic garage door switch n o.
So this thing provides the ability to activate two relays or monitor four contact sensors.
Seco larm sm 226rq enforcer overhead door mount magnetic contact closed loop adjustable to fit most door channel widths 2 3 4 70mm gap 24 61cm wire leads enclosed in armored cable 4 7 out of 5 stars 19.
This set is commonly used with security systems.
Smart wi fi garage door opener wireless garage door remote open and close garage door from anywhere compatible with amazon alexa google assistant 4 1 out of 5 stars 746 32 99 32.
This set is commonly used with security systems.
When the magnet and sensor separate the circuit opens.
These garage door contacts for closed circuits are used for systems that expect a closed circuit when the magnet and sensor are together.
Camera photo.
Security and surveillance accessories.