Differential Pressure Gauge Gauge Nominal Dial Size 3 1/2 in Basic Gauge Case Material Metal Differential Gauge Connection Type FNPT Differential Gauge Connection Size 1/8 in Gauge Connection Location Back and Side Differential Pressure Range Units in wc Differential Pressure Range Value -15 to 0 to 15 Gauge Accuracy +/-2.00 Percent Body Material Die Cast Aluminum Gauge Primary Range Smallest Graduation 1 Gauge Operating Temp Range 20 Degrees to 140 Degrees F