You can use any gas with a known HC or water dew point to validate. We recommend pure Ethane because its phase diagram (dew points at different pressures) is well known. You can also use pure propane, or any other gas with a precisely known dew point. Please note that this instrument measures both moisture and HC dew point using the same mechanism; i.e. unlike some other instruments, it is not using two different sensors. So if you validate with HC gas, you are assured that it is also working for moisture.
which gas has to use validated instrument
Does this equipment require coolant like CO2 or liquid nitrogen to lower the temperature?
No. The cooling system is completely electronic. No cooling gas is needed.
Dear concern, does this equipment can measure water dew point of instrument air? Pressure 110-400 psi range.
Yes, it does.
which gas has to use a validated instrument
You can use any gas with a known HC or water dew point to validate. We recommend pure Ethane because its phase diagram (dew points at different pressures) is well known. You can also use pure propane, or any other gas with a precisely known dew point.
Please note that this instrument measures both moisture and HC dew point using the same mechanism; i.e. unlike some other instruments, it is not using two different sensors. So if you validate with HC gas, you are assured that it is also working for moisture.