Dwyer 2302 Magnehelic® Differential Pressure Gauge is a versatile and accurate gauge suitable for use with air and non-combustible, compatible gases. With an accuracy of ±2% (±1% for the -HA model) and an enclosure rating of IP67, it is capable of withstanding tough conditions. The gauge features a 4" dial face, a die cast aluminum case and bezel, and a pressure range of -20 in Hg. to 15 psig. Standard accessories include plugs for pressure taps and mounting adapters.