... pressure regulator to show the pressure of natural gas in cylinder. Through a gas pressure sensor inside, the gauge sends pressure signal ... changeover switch, so that the driver get to know the gas volume inside cylinder. Specification:1. Type: YR 2. Accuracy rating ... range: 0~400bar, 0~6,000psi (dual scale)5. Coupling: Bottom or back connection6. Thread Coupling: M20x1,5, BSP, NPT, BS ...