The ICON Truflo NC-25 flow and level switch is a non-intrusive all-plastic design that fits pipe diameters 3/8 to 1/2 inch (7 to 13mm). The NC-25 features a 14-turn sensitivity adjuster and a orange light detection indicator. It detects the presence of fluid in the pipe (flow/no flow) with ±0.2mm maximum accuracy. The NPN open collector output allows easy integration with control systems. Operating temperature range is 32 to 131°F (0 to 55°C).