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