Vaisala HMT370EX - Available Measurement Parameters

2.4 Available measurement parameters
Table 3 (page 12) lists the available HMT370EX measurement parameter options and their
abbreviations and units for the standard probe options HMP371, HMP373, HMP374, HMP375,
HMP377, and HMP378.
Table 3 Available measurement parameters for HMP371, HMP373, HMP374, HMP375, HMP377, and
HMP378
Parameter Abbreviation Unit
Relative humidity RH %RH
Temperature T °C (°F)
Dew point temperature T
d
°C (°F)
Dew point / frost point
temperature
T
d/f
°C (°F)
Absolute humidity a
g/m
3
(gr/ft
3
)
Mixing ratio x g/kg (gr/lb)
Wet-bulb temperature T
w
°C (°F)
Water concentration H
2
O ppm
v
Water vapor pressure pw hPa (psi)
Water vapor saturation
pressure
pws hPa (psi)
Enthalpy h kJ/kg (Btu/lb)
Dew point temperature
dierence
ΔT °C (°F)
Absolute humidity at NTP aNTP
g/m
3
(gr/ft
3
)
Water mass fraction H
2
O
w
ppm
w
Table 4 (page 12) lists the measurement parameter options available for the oil and fuel probe
variants HMP378F and HMP378H.
Table 4 Available measurement parameters for HMP378F and HMP378H
Parameter Abbreviation Unit
Available for both HMP378F and HMP378H
Temperature T °C (°F)
Relative saturation RS %RS
Water activity a
w
HMT370EX User Guide M212305EN-B
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