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Mositure In Gas,SMART-MT

2021-01-2047

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Moisture in Gas


The trace moisture meter is suitable for stable and continuous measurement of highly corrosive gases/most gases.

Description

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.

Working principle

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.

Features

Zirconia ceramic or glass material is optional. The movable bolt is connected for easy disassembly.

水分仪安装

Installation

▲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

Application

★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;

氯化氢水分仪

Technical Parameters:

Sensor Material

Glass / Ceramic / PEEK, Platinum                         

Flow Cell Material

PVDF or stainless steel

Accuracy

0.4ppm or 5% of measured value

Sensitivity 

0.1ppm

Reaction time

less than 1 second

Reaktionszeit T50(upwards)           

less than 8 seconds

Reaktionszeit T50(downwards)

less than 2 minutes

Measurement of gas flow 

20Nl/h / 100Nl/h

Sensor gas max. pressure

3Bar (PVDF) / 10Bar (SS)

Ambient temperature

5~60℃

Connection method

1/4NPT threaded or KF40 vacuum flange connection

Gas measuring tube diameter 

6mm

Leakage level

< 5x10-8 mbar x l / s-1

Electrical connections

5Pin

Measuring cable

1.5 meters to 150 meters

Explosion proof 

Intrinsic Safety Ex ia optional

氯化氢水分仪

Some cases:

▲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

现场



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