Dwyer 2000-250PA Magnehelic® Differential Pressure Gauge is a reliable and accurate gauge for measuring pressure differentials in air and non-combustible gases. It has a temperature range of 20 to 140°F (-6.67 to 60°C) and an accuracy of ±2% (±1% for -HA models) at 70°F (21.1°C). The gauge features a die-cast aluminum case and bezel with an acrylic cover, and has an IP67 enclosure rating for durability. It comes with standard accessories such as pressure plugs, tubing adapters, and mounting adapters. The gauge can be used with pressures up to -20 in Hg to 15 psig (-0.677 bar to 1.034 bar).