Relative Humidity Products Michell Instruments offers a wide range of humidity and temperature measuring sensors and instruments, including relative humidity transmitters, humidity and temperature transmitters, handheld indicators and humidity generators.



BSI Certificate
ISO 9001:2015
Michell Instruments Limited UK, has been awarded registration to BS EN ISO9001:2015.

These prestigious accreditations and registration give Michell Instruments Ltd a unique position within the field of hygrometry - independently audited and commended by National Bodies on both quality and calibration.

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At Michell Instruments Limited UK, we understand and endorse the need to conform to recognised standards for quality and calibration. Our calibration laboratory maintains full traceaility to British (NPL) and American (NIST) Humidity Standards.

Michell Instruments Limited UK, has been accredited to UKAS (United Kingdom Accreditation Service) for the calibration of dew point hygrometers since 1986 (laboratory number 0179) and our current dew point calibration range is -90 to +90°C. For full details of our measurement capability please see our Schedule of Accreditation below. Our traceability to NIST (National Institute of Standards & Technology) is over the range -75 to +20°C.

Michell Instruments Limited UK has been awarded UKAS accreditation for the calibration of relative humidity instruments. The accreditation covers the relative humidity range 10 to 98 %RH at temperatures from 10 to 90°C

As a result of the European Accreditation (EA), our UKAS accreditation carries equal validity in any country which is a member of the EA.


Michell's UKAS accreditation is commonly recognised in the USA as equivalent to NVLAP (National Voluntary Laboratory Accreditation Program) accreditation.


CE bcas
British Compressed Air Society Membership