The VPA1MPA is an optical level probe that uses modulated infrared light for the detection of liquids. This self-contained unit features a stainless steel housing and a polysulphone tip, which offers high chemical resistance to most acids and bases. It operates on a 10 to 40 VDC supply and provides a PNP make and break switching output with a continuous current rating of up to 200 mA. Designed for direct mounting through a tank wall, this sensor is protected against reverse polarity and short circuits, making it a reliable choice for various industrial level sensing applications.