NEW UNOPENED EXCELLENT CONDITION AS IS. Detect the presence of objects (including non-metallic materials like plastics, liquids, wood, etc.) when they come within sensing range. The threaded barrel and included nuts allow the sensor to be mounted securely. Supply Voltage: 10-36 V DC Output: 200 mA max Connector: appears to use a 4-pin M12 style Mounting: threaded barrel with locking nuts included Protection Rating: IP65 / IP67 Capacitive sensors like this detect change in capacitance when an object enters the sensing field—commonly used for: Detecting presence of bottles, boxes, liquid levels, or bulk material Sensing plastic parts on a conveyor General object detection in automation
eBay