The Laboratory of Humidity operates a standard humidity generator, which creates an air stream of very accurately known dew-point temperature, in the range -20 ºC to 90 ºC, with traceability of measurements to the national standards of temperature (EIM). This humidity generator is used to calibrate directly the optical hygrometers of the Humidity Laboratory.

The Laboratory carries out calibrations of:

optical dew point hygrometers
directly against the standard humidity generator
Temperature Range -20 ºC to 90 ºC.

relative humidity (% R.H.) sensors
through comparison calibration
Temperature Range 0 ºC to 70 ºC, Relative Humidity 10% R.H. to 95% R.H.