If probe heating is enabled, output parameters that are dependent on temperature
measurement (such as relative humidity) are locked whenever probe is heated unless the true
temperature of the measured environment is updated to the temperature compensation
register of the probe from another measurement instrument (for example, the TMP1 probe).
Output parameters such as dew point temperature that can be measured or calculated
without this external temperature information are available even without the temperature
input.
3.5 HMP8 probe
136 [5.35]
Probe cable 2 m [6.56 ft]
Ø 25 [0.98]
M12/5
Ø 12 [0.47]
41 [1.61]
Ø 13.5 [0.53]
Fitting body
ISO1/2” or NPT1/2”
Ø 5 [0.2]
mm
[in]
268 [10.55]
230 [9.06]
41 ... 185 [1.16 ... 7.28]
Figure 8 HMP8 probe dimensions
Vaisala HUMICAP
â
Humidity and Temperature Probe HMP8 is designed for pressurized
applications in compressed air systems, refrigerant dryers, and other pressurized industrial
applications, where easy insertion and removal of the probe and adjustable installation depth
into the pipeline are needed.
• Temperature measurement range −70 … +180 °C (−94 … +356 °F)
• Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
• Operating pressure 0 … 4 MPa (0 … 40 bar)
• Probe installation depth can be freely adjusted and probe can be hot-swapped from
pressurized pipelines with an installation valve
• ISO1/2" or NPT1/2" fitting body
Chapter 3 – Installation
19
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