... to show the pressure of natural gas in cylinder. Through a gas pressure sensor inside, the gauge sends ... switch, so that the driver get to know the gas volume inside cylinder. 1. Type: YR 2. ... 2''. Or, your customized size4. Measurement range: 0~400bar, 0~6,000psi (dual scale)5. Coupling: Bottom or back ... Certificate of Utility Model Patent11. Dial plate: Single or dual scale (psi, kpa, mpa, bar, kg/cm) ...