This is the VL18-FNM4-RO Photoelectric Proximity Sensor, amplifier for diffuse or through-beam type fiber optics sensor designed for industrial use. It features a short metal body and a red light source with a sensing distance of up to 200mm. 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.