The RPS-322 has 2 sealed stainless steel multiplexed transducers, independent range control adjustments, LED indicators, and form C relay outputs. The transducer head is constructed of 303 grade stainless steel with a 302 grade stainless steel sensing face, and is best suited for environments where dirt and moisture are a problem, as well as some chemical environments. This sensor also has a unique master and slave feature which enables many of the same units to be used within close proximity of one another without cross-talk interference. For example, if three sensors are needed in a close area, one sensor would be left as a master and the other two would be slaves.