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QT50 Adafruit IR Break Beam Sensor photoelectric switch

QT50 Adafruit IR Break Beam Sensor photoelectric switch

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Product Description:

Infrared (IR) break-beam sensors are a simple way to detect motion. They work by having an emitter side that sends out a beam of human-invisible IR light, then a receiver across the way which is sensitive to that same light. When something passes between the two, and its not transparent to IR, then the ‘beam is broken’ and the receiver will let you know.

Compared to PIR sensors, breakbeams are faster and allow better control of where you want to detect the motion. Compared to Sonar modules, they’re less expensive. However, you do need both emitter and receiver on opposite sides of the area you want to monitor.


Sensing Distance: Approx 50cm / 20″
Power Voltage: 3.3 – 5.5VDC
Emitter Current Draw: 10mA @ 3.3V, 20mA @ 5V
Output Current Capability of receiver: 100mA sink
Transmitter/Receiver LED Angle: 10°
Response Time: <2 ms
Dimensions: 20mm x 10mm x 8mm / 0.8″ x 0.4″ x 0.3″
Cable Length: 250mm / 10″
Weight (of each half): 3g

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