FEATURE  Sensors & Sensing Systems


Moisture measurement in gases - quickly and reliably


WITT is a manufacturer of gas-related equipment that meets the highest  cutting and welding. Today, the company offers a complete range of gas safety and control equipment. These products include gas mixers, gas analysers and 


E


ven low levels of moisture in gases and compressed air can lead to deviations in industrial processes or cause damage to


equipment. Regular checks of trace moisture are therefore important. WITT offers two high-quality measuring


devices for the determination of humidity or dew point of gases – the mobile hand-held device HYDROBABY and the desktop device MFA H2O.


These instruments determine relevant


measured variables, such as the dew point in degrees Celsius and the volume ratio of water vapour to gas in ppmv. In addition, they generate graphical trend curves of the measured values. WITT moisture analysers operate with a ceramic metal oxide sensor. This leading-edge sensor technology is characterised by its fast measuring speed, exact measurements as well as its high reproducibility. A result is usually available after only three minutes, with a dew point accuracy of +/- two degrees Celsius. This


26 February 2022 Irish Manufacturing


saves the service technician’s time, and ensures the high reliability of the results. The large measuring range from -110 to +20 degrees Celsius embraces a wide range of applications. In addition, the measurement technology is contamination-resistant. The measurement is temperature-compensated and, if desired, also pressure-compensated via an optional pressure sensor. The particularly small and lightweight


HYDROBABY was developed especially for mobile use. The robust device made of shock- resistant plastic and pressed aluminium weighs only around 1,600 grams and is powered by a long-lasting rechargeable battery. A built-in diagnostic routine protects against incorrect   HYDROBABY is weatherproof and ideal for outdoor measurements. Also compact and mobile, but designed


more for benchtop operation, is the MFA H2O. As additional features, this variant has


 Furthermore, a vacuum pump can also be incorporated, to enable sampling from ambient air or in the negative pressure range. Both instrument types have an illuminated


graphic display, are easy to operate, and provide  Analysis data is logged and can be transferred via the USB interface. A 4-20 mA signal is also available as an option. All analysers are supplied with a calibration procedure. Classic applications for moisture


measurement include monitoring condensation in natural gas pipelines, controlling dryer systems in compressed air pipelines or monitoring furnace gases in heat treatment. Moisture measurement is also relevant in numerous other applications, such as welding and cutting, cryogenics, petrochemicals, medicine and pharmaceuticals, and in the food industry.


WITT www.wittgas.co.uk www.irish-manufacturing.com


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