Chapter 9 ____________________________________________________________ Technical Data
VAISALA_______________________________________________________________________ 75
Water Activity in Jet Fuel Applications
Calculated Variables (Typical Ranges)
With HMP361 Probe
With HMP363, HMP364, HMP365, HMP367 and
HMP368 Probes
Table 9 Water Activity in Jet Fuel Applications Specifications
Property Description / Value
Measurement range 0 ... 1 a
w
at -40 ... +180 °C (-
40 ... +356 °F)
Accuracy when calibrated against high
quality, certified humidity standards
salt solutions (ASTM E104-85)
± 0.01 (0 ... 0.9)
± 0.02 (0.9 ... 1.0)
± 0.02 (0 ... 0.9)
± 0.03 (0.9 ... 1.0)
Response time (90 %) at +20 °C in still oil
(stainless steel filter)
10 min
Humidity sensor
Vaisala HUMICAP
®
Calculated variables available mass concentration of water
relative humidity of saturation
saturation temperature
Accuracy of the water content better than ± 15 % of the
reading
Table 10 HMP361 Calculated Variables Specifications
Property Description / Value
Dewpoint temperature -40 ... +60 °C
Mixing ratio 0 ... 160 g/kg d.a.
Absolute humidity 0 ... 160 g/m³
Wet bulb temperature 0 ... +60 °C
Table 11 HMP363, HMP364, HMP365, HMP367& HMP368
Probes Calculated Variables Specifications
Property Description / Value
Dewpoint temperature -40 ... +100 °C
Mixing ratio 0 ... 500 g/kg d.a.
Absolute humidity 0 ... 600 g/m³
Wet bulb temperature 0 ... +100 °C