Customizable Multi Infrared Gas Analyzer Runlai U150, High Accuracy Gas Tester with T90 10s Response Time for CH4, CO, CO2, NH3, CnHm, SF6 and SO2 Gas Concentration Testing Measurement Principle: NDIR principle (non-dispersive infrared); Measurement Range: (Select detection components and range at the time of ordering) The above ranges and components can be combined as needed by the user. Sample Gas Pressure: 0.05MPa ≤ Inlet Pressure ≤ 0.25MPa; Control Output: Relay contact