Dwyer 4202 Capsuhelic® Differential Pressure Gauge is a reliable and accurate device suitable for a wide range of applications. With a temperature range of 20 to 200°F and an accuracy of ±3% of FS at 70°F, it provides precise measurements. The die-cast aluminum housing ensures durability, and optional forged brass housing is available for water-based fluids. It can handle air, gases, and oil-based liquids, and the diaphragm should be positioned vertically. The gauge has a pressure limit of -20" Hg to 500 psig and features 1/4" female NPT high and low-pressure taps. The 4" diameter dial face and standard accessories make it easy to install and use.