Vaisala PTU300 Podręcznik Użytkownika Strona 21

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Chapter 2 __________________________________________________________ Product Overview
VAISALA _______________________________________________________________________ 19
Warmed Probe PTU307
Temperature difference between the probe head and external
environment can cause a risk of condensation on the sensor. A wet
probe cannot observe the actual humidity in the ambient air. If the
condensed water is contaminated, the life span of the probe may
shorten and calibration may change.
PTU307 probe shall be used in applications where condensation can
occur due to high humidity and rapid humidity changes. The warmed
probe head is heated continuously so that its temperature is always
higher than that of the environment. This prevents condensation on the
probe. The power consumption of the warmed probe is slightly higher
than that of the other probes.
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