S.S. Pressure Gauge Specification Size: 1.5” (40mm), 2.5”(63mm) , 4”(100mm), 6”(150mm) Measuring Range: compound, vacuum 76cmHg (30"Hg) up to 15, 000 psi (1, 000 bar) Dial: white aluminum with markings and graduations Window: polycarbonate, glass, safety glass, tempered glass Pointer: black finished aluminum Ring: sus304 or sus316 stainless steel Case: sus304 or sus316 stainless steel Filling: dry and fillable (oil type available glycerin, silicone) Movement: sus304 stainless steel Socket: sus316 stainless steel Bourdon Tube: 316L C-tube for vacuum to 1, 000 psi, spiral tube wound for 1, 000 psi to 15, 000 psi Connection: 1/8", 1/4", 3/8", 1/2" NPT/ BSP thread Mounting: bottom, center back with surface, flush and u-clamp Accuracy: 1.5", 2"(+/-2.5% of full scale), 2.5", 3", 4", 6"(+/-1.5% of full scale) Operating Temperature Limit: -20 ~ 200°C (-4 ~ 400°F)