Ametek Crystal M1 [M1-30PSI-HOX-E] Digital Pressure Gauge, 1/4" NPT Male, 0 to 30 PSI w/ Pump System H (Oil/Pneumatic) -27 inHg to 580 psi/-0.91 to 40 bar & 0 to 5000 psi/350 bar, No Liquid (Drained) & Waterproof Case. The M130PSIHOX Crystal Pressure Gauge maintains a reading reading of 0.2% from -10˚ to 50˚C. Accuracy is not affected by drops, overpressure, vibration, temperature or rapid pressure changes.