... Measuring oxygen concentration in H2 or deoxidize gas3. Inner special gas-route protects the sensor when it exposures in the air ... long time by out of power or cutting off the gas-route automatically.4. Concise menu, simple operation5. Automatic temperature ... 0.05MPa≤Inlet pressure≤0.5MpaMeasure Medium: H2, N2, Ar, inert gas, hydrocarbons & mixed gasesSignal Output: 4-20mAContact Capacity: 125VAC 0.3A ...