This is the VB18-DPM4-RSCS-2M Photoelectric Proximity Sensor, a diffuse-type sensor with BGS (Back Ground Supresion) designed for industrial use. It features a short body and a red light source with a sensing distance of up to 10mm ~ 100mm. It comes with all necessary installation accessories and is waterproof, making it ideal for use in bottle and all types short conveyors. With its reliable performance, this sensor is perfect for any industrial application.