Wenglor HN70PA3 Diffuse Mode Photoelectric Sensor

The Wenglor HN70PA3 is a diffuse-mode photoelectric sensor with background suppression that delivers reliable non-contact object detection in industrial automation. It detects moving components over an 80–700 mm range using infrared light, maintaining stable switching performance regardless of object color or surface thanks to background suppression. Designed for packaging machinery, conveyors, and production lines, it operates on 10–30 VDC, draws about 30 mA at 24 V, and switches at up to 250 Hz with a 2 ms response time. The PNP output can be configured as NO/NC, and the unit is IP67-protected with a plastic housing and M12 × 1, 4-pin connection for rugged installation. Common applications include packaging systems, conveyor automation, and inspection equipment where precise, non-contact detection is essential for continuous operation. The part number is HN70PA3 from Wenglor, and this sensor is commonly used as a replacement or upgrade in retrofit projects within automated production environments. Common replacements noted for reference include Wenglor HD11PA3, Banner QS18, and Omron E3Z diffuse photoelectric sensors.