• Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
• 250-mm (9.84 in) probe allows easy process installation through insulation
4.7 HMP7 probe
136 [5.35]
Ø 25
[0.98]
M12/5
Ø 12
[0.47]
99.5 [3.92]
79.5 [3.13]
37.5 [1.48]
Groove for
lock ring
Ø 12
[0.47]
Ø 5
[0.2]
Probe cable
2 m [6.56 ft] or 10 m [32.8 ft]
mm
[in]
Figure 11 HMP7 probe dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP7 is designed for applications that
involve constant high humidity or rapid changes in humidity, such as drying and test
chambers, combustion air, and other humidifiers and meteorological measurements, where
measurement performance and chemical tolerance are essential.
• Temperature measurement range −70 … +180 °C (−94 … +356 °F)
• Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
• Condensation prevention with probe heating
• Vapor and pressure proof construction
Condensation prevention with probe heating
Condensation prevention on HMP7 uses a combination of probe heating and sensor warming.
Probe heating keeps the entire probe head above the current dew point temperature, which
prevents condensation from forming on the probe.
Chapter 4 – Installation
27
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