Dwyer 2-5020-NPT Minihelic® II Differential Pressure Gauge operates in temperatures ranging from 20 to 120°F (-6.67 to 48.9°C), with an accuracy of ±5% of full scale at 70°F (21.1°C). Its housing is made of glass-filled nylon, with a polycarbonate lens. It is suitable for use with air and compatible gases. The gauge can be mounted with the diaphragm in a vertical position, and the process connection is barbed for 3/16" ID tubing (standard) or 1/8" male NPT (optional). It has a pressure limit of 30 psig (2.067 bar) continuous to either pressure connection. Wetted material options are available upon consultation with the factory.