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U.S. Department of Health and Human Services

Science & Research

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Volume IV - 13.6 Relative Humidity

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Orientation and Training

Food and Drug Administration


Section 13 - Engineering

EFFECTIVE DATE: 10-01-03REVISED: 02-14-13

A.  Objective

To provide the trainee with a review of the fundamentals of relative humidity and the measurement of relative humidity.

B.  Assignment

The trainer will present a fundamental review of relative humidity and instrumentation (and instrument calibration techniques) used to measure relative humidity, including:

  • sling psychrometers,
  • hygrometers,
  • electronic humidity and temperature sensors and instruments, and
  • environmental chambers.

The trainee will be assigned calculations and exercises to provide practical experience in the measurement of relative humidity.