... pressure of natural gas in cylinder. Through a gas pressure sensor inside, the gauge sends pressure signal to fuel changeover switch ... cylinder. Specification:1. Type: YR 2. Accuracy rating: 2.53. Case Diameter: 50mm=2''. Or, your customized size4. Measurement range: 0 ... . Thread Coupling: M20x1,5, BSP, NPT, BS, UN...7. Ambient Temperature: -10~70°C 8. Relative humidity: ≤80%9. Wire connection ...