Adjustable sensing range and rugged design: The sensor offers a flexible detection range from 0 to 6.5 feet, adjustable to suit different tasks. It operates from 25 C to +75 C and uses an ABS housing with strong anti interference and stability, suitable for indoor and outdoor use. Advanced infrared sensing technology: The E3ZR61 uses a reflective infrared photoelectric switch. The transmitter and receiver are co located and the beam is reflected back by a reflector. Any object blocking the beam triggers the sensor. Versatile output and compatibility: It provides an NPN output that can be configured as normally open or normally closed. It operates on DC 636 V and supports currents up to 300 mA. Multi purpose applications: Suitable for security systems, industrial automation and residential convenience. Applications include garage doors, automatic doors, overhead door security systems, small object detection on production lines, storefront entrance detection, and parking assist or alarm sensors.