Dwyer 2000-300MM Magnehelic® Differential Pressure Gauge is a reliable and accurate gauge with a temperature range of 20 to 140°F (-6.67 to 60°C). It has an accuracy of ±2% and an enclosure rating of IP67. The housing is made of die-cast aluminum and can withstand a 168-hour salt spray corrosion test. It is suitable for air and non-combustible gases and can be used with hydrogen with a Buna-N diaphragm. The gauge has a 4" diameter dial face and comes with standard accessories. It has a pressure limit of -20 in Hg to 15 psig and multiple process connections.