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Michell has loaned two instruments to the National Needlework Archive (NNA) to help preserve an iconic mural.

The textile work, entitled ‘The Country Wife’, was designed by Constance Howard for the Festival of Britain in 1951.

However, after nearly 60 years, the mural is in need of restoration work to ensure its survival.

Part of the preservation process involves storing the work in an anoxia bubble where levels of oxygen are maintained at one per cent, with a relative humidity (RH) of less than 50 per cent at +23C.

In order to monitor this environment, the NNA is using two of Michell’s instruments: an XTP600 oxygen transmitter and a DM509 RH handheld device.

The XTP600 uses the stable thermo-paramagnetic sensing technology to measure levels of oxygen in gases.

With its high-reliability and low-maintenance requirements, it is suitable for applications where the instrument is needed to monitor conditions over a long period of time.

The DM509 is a versatile handheld RH and temperature transmitter that is lightweight, portable and simple to operate, according to Michell.

This is a vital feature for the NNA staff who want to focus on the restoration work rather than the instrumentation.

The restoration project on this and other textiles is planned to take several years to complete, with the instruments on loan from Michell helping to maintain the environmental conditions throughout.

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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