Digi code universal sensors cr2149 universal garage door opener safety beam sensor.
Wireless door beam sensor.
In stock on september 27 2020.
The system consists of a send receive unit which transmits an ir beam across the doorway onto a prismatic reflector mounted on the opposite side.
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When a person walks through the beam the circuit is interrupted and this causes the alarm to sound an audible warning.
The entry alert or chime occurs when someone breaks the invisible beam.
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The beam is reflected back to the receiver to complete the circuit.
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