Dwyer 2201 Magnehelic® differential pressure gauge is a reliable and accurate device for measuring pressure in air and non-combustible gases. It has an IP67 enclosure rating and a die-cast aluminum case and bezel. This gauge is suitable for temperatures ranging from 20 to 140°F (-6.67 to 60°C) and has an accuracy of ±2% (±1% for -HA model) throughout its range. The gauge features a 4" diameter dial face and can withstand pressures from -20 in Hg to 15 psig. It comes with standard accessories such as pressure taps and flush mounting adapters.