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Michell Instruments has introduced the miniature PCmini52 relative humidity (RH) probe, which is designed to provide reliable measurements in high-humidity applications.

Many RH instruments installed in these applications suffer from poor reliability because the electronics are exposed to the harsh, damp environment.

The PCmini52 probe is said to overcome this problem with electronics that are encapsulated in a protective resin and so are completely protected from the atmosphere.

This gives the instrument an IP65 rating and enables the probe to provide reliable measurements no matter how high the surrounding humidity.

The PCmini52 humidity transmitter uses a capacitive thin-film polymer sensor, which either absorbs or releases water vapour as the relative humidity of the ambient air rises or drops.

These sensors, developed by Michell Instruments’ Coreci division, offer a fast response and good sensitivity to fluctuations in humidity.

The PCmini52 is a flexible option, offering different output voltages.

In addition to its miniature size, it can be configured with both plastic and stainless steel housing for additional protection.

A low power consumption of 3mA (output 0-1V) makes the PCmini52 flexible enough for battery operated or wireless applications as well as fixed installations.

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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