Stationary digital psychrometer FNAD 46-3
Hand-held digital psychrometer FNAD 46
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Digital psychrometers, FNAD 46 and FNAD 46-3

  • with integrated atmospheric pressure sensor, for automatic pressure compensation
  • Designs and specifications see data sheet
Datasheet - Psychrometer
Stationary digital psychrometer FNAD 46-3
Hand-held digital psychrometer FNAD 46
Stationary digital psychrometer FNAD 46-3

Digital psychrometers, FNAD 46 and FNAD 46-3

Technical data and functions

  • A digital atmospheric pressure sensor integrated in the ALMEMO® D6 plug itself provides automatic pressure compensation for all pressure-dependent humidity variables.
  • Humidity calculation on the basis of formulae as per Dr. Sonntag and the enhancement factor as per W. Bögel (correction factor fw(t,p) for real mixed gas systems)
    This substantially widens the measuring range and improves the accuracy of humidity variable calculations.
  • Humidity variable Absolute humidity in g/m³
  • High-precision NTC sensors for dry temperature and wet temperature
  • Temperatures are measured using a 24-bit A/D converter incorporated in the ALMEMO® D6 plug.
  • The humidity variables are calculated from the three primary measuring channels (real measurable variables):
    Dry temperature, wet temperature, atmospheric pressure
  • Freely selectable measurable variables
  • Four measuring channels are programmed (at our factory):
    dry temperature (°C, TT, t), wet temperature (°C, HT, tw),
    relative humidity (%H, RH, Uw), atmospheric pressure (mbar, AP, p).
Basics of Humidity and Moisture Measurement
Order numbers for this product group:
FNAD46, FNAD463
For more information on the types, see the data sheet.

Downloads

Here you can find all downloads related to the digital psychrometers, FNAD 46 and FNAD 46-3. For documents and software related to other devices and topics, please visit our download area.

Operating instruction - Digital ALMEMO® D6 sensors

ALMEMO® Manual 2020