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The Michell Instruments S8000 Integrale cooled-mirror can cope with sample gas at pressures of up to 17barg.

This means a reduced response time, which can save time and money in dry applications (such as compressed air and bottled gases) where low dew-points are reached.

Pressurising the sample-speeds quickens the response time because the gas will have a higher dew point than the same sample at atmospheric pressure.

This is because the water molecules are squeezed closer together under pressure, making the sample wetter than it would be at atmospheric pressure.

For example, a pressure dew-point of -65C at 17barg is equivalent to an atmospheric dew-point of -100C.

With the higher dew point under pressure, the S8000 can reach the temperature and stabilise faster than with the lower atmospheric dew point.

Updates to the S8000 firmware allow the tracking of any minute dew-point changes in the sample gas.

Increased response times allow manufacturers of compressed air to react faster to changes and reduce wastage and down-time.

Operating at pressure has the additional benefit of removing the need to reduce pressure on the inlet of the chilled-mirror device.

The sampling system has been simplified by eradicating potential uncertainties associated with the use of pressure-reducing devices that are prone to water-vapour contamination.

Michell Instruments

Michell Instruments is an international leader in high-precision sensing with over 35 years’ experience in the field, specialising in instrumentation for dew point, relative humidity and oxygen analysis. The company serves industries as diverse as petrochemical and pharmaceutical to power generation and food processing. The product range includes:

  • High-precision ceramic moisture sensors to measure trace moisture in process applications.
  • Relative humidity transmitters and sensors for use in HVAC applications, pharmaceutical storage and other production processes where controlled environmental conditions are crucial.
  • Humidity calibration systems and reference dew-point hygrometers enable customers to carry out the calibration of portable hygrometers and relative humidity instruments in-house, saving on downtime and costs.
  • Zirconia and thermo-paramagetic oxygen analysers for combustion optimisation, maintaining gas purity, controlling levels of CO2 in breweries and many other applications.
  • Condumax II Hydrocarbon dew point analysers ensure the quality of natural gas at custody transfer, prevent gas burner failure and the prolong the life of process equipment, helping companies save millions of dollars on repairs and downtime.
  • Trace moisture in hydrocarbon liquids analysers are available in explosion-proof and instrinsically safe versions and allow the continuous measurement of moisture content in a wide range of applications from transformer oil, petrochemical factions and pure hydrocarbons.
  • Process moisture analysers provide continuous on-line measurements of trace moisture in process gases and are available as explosion-proof, instrinsically safe and laboratory versions.

Michell Instruments has three manufacturing locations: Oosterhout, The Netherlands; Lyon, France and Ely, UK. The company has an extensive network of factory-trained application engineers, subsidiaries and distributors stretching across 56 countries.

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