The IR33 is an infrared sensor, detecting objects or movements to prevent the barrier gate’s boom from striking vehicles as they pass through. It works with 12V~24V AC/DC power, has a 15M max range, 1.92KHz infrared frequency, 940nm wavelength, and 1A/36V relay output.
Install it over 20CM above ground. Keep emitter and receiver at least 2 meters apart, mounted vertically on the same horizontal line face-to-face. When aligned, the receiver’s LED turns off. Fix them and connect wires as instructed.
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