Catalog > Consumer Electronics > Security & Alarms > TAKEX Products Photoelectric Beam Sensor Photoelectric Beam Sensor TAKEX PR-1B PHOTOELECTRIC BEAM SENSOR FOR INDOORS ONLY COVERAGE:1M , PSU10.5V~22VDC , 75g Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview The PR-1B is a non-reflector type presence sensor which emits an infrared beam to a distance of 1m. When the Infrared beam signal is reflected back to the transceiver (by a passing human or object) a contact output is triggered. PR-1B is a pocket calculator sized beam designed for unobtrusive protection. Downloads User Manual - TAKEX PR-1B PDF File 583.83 KB Datasheet - TAKEX PR-1B PDF File 717.07 KB