When the magnet and sensor separate the circuit opens.
Garage door contacts closed circuits.
That means i needed two zigbee io devices.
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.
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.
Heavy duty magnetic garage door switch n o.
Luckily they re small and pretty affordable.
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These garage door contacts for closed circuits are used for systems that expect a closed circuit when the magnet and sensor are together.
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.
These garage door contacts for closed circuits are used for systems that expect a closed circuit when the magnet and sensor are together.
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.
Security and surveillance accessories.
Camera photo.
So this thing provides the ability to activate two relays or monitor four contact sensors.
These contacts can be as far as 2 apart and still operate.
This set is commonly used with security systems.