• Moisture monitoring in gaseous matrices

Air Monitoring

Moisture monitoring in gaseous matrices

Apr 23 2021

In 2020, Chromatotec introduced into its lineup, the DET H2O Electrolytic Moisture Monitor Hygrometer; available in process or portable versions. These hygrometers, with pressure reducers allow moisture measurement byelectrolysing residual amounts of water (between 0 and 1500 ppmV) contained in gaseous matrices.

The instrument’s function is based on the fundamental measuring principle of humidity, Faraday’s Law of Electrolysis and does not require calibration. It offers high moisture-measurement accuracy thanks to two programmable concentration ranges between 0-10 ppm (v) or 0-1500 ppm (V/p). It also offers a fast response (<10 minutes) with direct on-line connection and no additional sampling equipment required. The system is also very resistant to contamination, even with corrosive gases such as chlorine or H2S. 

A main type of application for this solution is the calibration of the other moisture monitors on the market, such as aluminum oxide sensors requiring validation. But it is also relevant for moisture monitoring of chlorine gas drier outlets, measurement of moisture in natural gas or in a refinery’s catalytic reformer. 

The complete sampling system is engineered for the previously-mentioned applications. An ATEX-certified version for Zones 1 & 2 is also available upon request. 


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