Dwyer Instruments” Series SGO stainless steel gauge with protective diaphragm has dual English/metric scales with 1.6 percent full-scale accuracy. Units feature a 304 SS housing, 316L SS chamber, and PTFE-coated diaphragm for chemical compatibility. The Series SGO can withstand ambient temperatures up to 149 F (65 C) and process temperatures up to 248 F (120 C), and ranges are available from full vacuum, compound to 300 PSI.