Absolute Pressure Gauge Calibrator; 30 psi Absolute Absolute pressure measurement ranges 15, 30, 100, 300 psia Reference class gauge accuracies to 0.04% of reading Easy to use, rugged construction for reliable performance ATEX rating: II 3 G Ex nA IIB T6 Bright backlit display for easy viewing of pressure measurements Rugged; durable design with protective holster Precision pressure measurement from "10 inH2O to 10,000 psi (20 to 690 bar)