Able to measure as close as 1.75 in., ToughSonic® 3 has optimum range of 2 ft and max range of 3 ft. Sensor is user-configurable, via using included SenixVIEW configuration and analysis software, to meet interface and performance requirements, and Senix Teach function allows pushbutton sensor adjustment without computer. Packaged in 30 mm threaded 316 stainless steel housing, IP68-rated product is fully potted with 6 ft pigtail cable and offers interface reverse polarity protection.