Vaisala HMDW110 Serie Guide Rapide page 4

Output Parameters Explained
HMDW110 series transmitters offer several output parameters. Relative
humidity (RH) and temperature (T) are the measured parameters, the others are
calculated based on RH and T.
Parameter Symbol Units Description
Temperature T
Relative RH
humidity
Dewpoint Td/f
Enthalpy h
Wet bulb Tw
temperature
Check the type label on your transmitter to verify its output
parameters and scaling of the output channels.
2
°C Temperature in Celsius or Fahrenheit scale.
°F
% Ratio of the partial pressure of water vapor in
the air to the saturation vapor pressure of air at
current temperature.
°C Temperature at which the water vapor in the
°F air will condense into water at the current
pressure. When the dewpoint is below 0 °C,
the transmitter outputs frostpoint (Tf) instead
of dewpoint.
kJ/kg Sum of the internal energy of a
BTU/lb thermodynamic system.
°C The minimum temperature that can be
°F reached by evaporative cooling in the current
conditions.