The trace moisture meter is suitable for stable and continuous measurement of highly corrosive gases/most gases.
Electrolytic gas moisture measurement was successfully tested and applied to trace moisture measurement by Keide in 1959. This method provides an industrial solution for continuous measurement of trace water in non-alkaline gases, which can continuously, online and real-time monitor various industrial processes.
The electrodes are plated with parallel platinum wires or wound parallel platinum wires. The platinum wires are coated with a hydrated phosphorus pentoxide film. When the gas passes through the electrolytic cell, all the water is absorbed and phosphoric acid is generated. The DC voltage between the platinum wires causes the phosphoric acid to produce an electrolytic reaction to decompose oxygen, hydrogen and phosphorus pentoxide. When the absorption and electrolysis reach a balance, all the water entering the electrolytic cell is absorbed by the phosphorus pentoxide film and then electrolyzed completely. According to Faraday's law of electrolysis and gas law, the absolute value of moisture in a gas sample can be directly measured according to the electrolysis current.
Zirconia ceramic or glass material is optional. The movable bolt is connected for easy disassembly.
▲Corrosive gas: PVDF, non-corrosive gas: PVDF or SS stainless steel
▲The sample gas input pressure can reach 4Bar(PVDF)/10Bar(SS)
▲Stable sample gas flow rate 20Nl/h
▲Three-way valve and four-way valve operation, convenient for sensor maintenance and regeneration
▲Small positive pressure protection of compressed air in the sampling unit
▲Filter can be added for unlean gases
▲liquid chlorine can increase the electric heating of the pressure reducing valve
▲Suction pump can be added to the vacuum inlet
▲The sample gas outlet is recommended to be discharged into the exhaust gas for treatment
★Chlor-alkali PVC chemical industry: Analysis and measurement of trace water in chlorine gas/liquid chlorine/hydrogen chloride/sulfur dioxide;
★Fluorine chemical industry: Analysis and measurement of trace water in hydrogen fluoride;
★Polysilicon/organic silicon: analysis and measurement of trace water in chlorine/hydrogen chloride/silicon tetrachloride;
★Natural gas and petrochemical industry: analysis and measurement of trace water in natural gas, hydrogen, acetylene and other hydrocarbon gases;
★Gas: oxygen, nitrogen, carbon dioxide, argon or other rare gases
★Freezer/compressor: Trace water analysis and measurement;
★Electricity: SF6 trace water analysis and measurement;
Glass / Ceramic / PEEK, Platinum
Flow Cell Material
PVDF or stainless steel
0.4ppm or 5% of measured value
less than 1 second
less than 8 seconds
less than 2 minutes
Measurement of gas flow
20Nl/h / 100Nl/h
Sensor gas max. pressure
3Bar (PVDF) / 10Bar (SS)
1/4NPT threaded or KF40 vacuum flange connection
Gas measuring tube diameter
< 5x10-8 mbar x l / s-1
1.5 meters to 150 meters
Intrinsic Safety Ex ia optional
▲Monitor the moisture content of chlorine at the inlet of the chlorine compressor; monitor the moisture content of the chlorine at the outlet and the final outlet of the chlorine compressor, monitor the leakage of the precooler; protect the important sectors of the chlorine compressor.
▲Monitor the accuracy of the dew point analyzer at the outlet of the freezer.
SMART controller can be equipped with various field bus interfaces:
MODBUS,PROFIBUS DP, FOUNDATION FIELDBUS FF,PROFIBUS PA, HART,WirelessHART