Instrument: Hygrometer
Hygrometers are used for measuring relative humidity. This term is used when details of the make, model number and measurement principle are not known.
Model: R.M. Young 41372LC; Probe used to measure Air Temp and Relative Humidity on LMG1110 cruise. Calibrated range: -50 to 50 degrees C. More information on this instrument is available from Campbell Scientific.