Vaisala PTU300 - Manual (Page 48)

User's Guide _______________________________________________________________________
46 ___________________________________________________________________ M210796EN-G
NOTE Please do not attach a heated probe (PTU307) to metal structures to
avoid condensation problems caused by heat conduction along the metal.
If the process temperature is much higher than that of the environment,
the whole probe and preferably plenty of cable must be inside the
process. This prevents measuring inaccuracy caused by heat conduction
along the cable.
When mounted on the side of a duct or channel, the probe must be
inserted from the side of the duct. If this is not possible and the probe
must be inserted from the top, the point of entry must be carefully
insulated.
For Vaisala probe installation kits and some installation examples see
Appendix A on page 195.
PTU303 for General Use
The PTU303 is a small size (d=12mm) probe for general use, up to
+80 °C (+176 °F). The probe is suitable for weather stations,
environmental compensations, laser interferometers and test benches. It
is suitable for ducts and channels with the installation kit available from
Vaisala.