Dial SizePipe SizeEachLow-Pressure Differential Gauges Measure small pressure drops in air and noncorrosive gases. These differential pressure gauges are great for monitoring clogged filters, measuring fan and blower pressures, and checking air velocity. Their rugged aluminum case provides good shock and vibration resistance. Connect using either the side or back low- and high-pressure ports. All have a silicone-rubber diaphragm sensing element, aluminum NPT female connections, and acrylic lens. Accuracy is ±2% full scale, unless noted. Max. input pressure is 15 psi. Ambient and process temperature ranges are 20° to 140° F. Standard gaugesdisplay the difference between the low- and high-pressure ports.Compound gaugesare for processes where the low- and high-pressure ports vary; they display a positive or negative difference. Optional Portable Accessory Kit—Convert your differential-pressure gauge into a portable gauge. Kit includes a 9-ft., 3/16"; ID tube;
