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Paul Carroll

Paul Carroll

Senior Research Scientist

Paul is a leading expert on humidity measurement and calibration with more than 15 years' experience in the area. Paul presents sections of NPL's humidity training course and is a frequent presenter at other humidity events. He has worked on problem-solving consultancies and projects for a number of humidity applications and has published a variety of papers, reports and guides on humidity and moisture measurement.

Areas of interest

  • All aspects of humidity measurement, standards and hygrometer calibration
  • Humidity calibrations for industrial conditions, including for non-air gases and gas mixtures, and above-atmospheric pressures
  • Trace moisture in gases
  • Moisture in materials, including water-specific measurements, and calibration mechanisms
  • Accurate air temperature measurement
  • Measurement uncertainty evaluation

His current research interests include humidity measurement, standards and calibration in multiple gases and mixtures for application to industrial conditions. He has developed capability for characterising hygrometers in industrial conditions, particularly for hydrogen and other energy gas applications.

Email Paul Carroll

Key outputs / publications:

Good practice guide on calibrating commercial humidity sensors for use at Hydrogen Refuelling Stations:

A Calibration Facility for Dew Point in Air up to 1 MPa:

Measurement of water sorption isotherms of material using combined real-time humidity and microwave resonance measurements

Read about Paul’s main area of research