Vaisala PTU300 - Manual (Page 49)

Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 47
See Appendix A on page 195 for the following probe installation kits for
PTU303 and installation examples.
- Duct mounting kit
- Cable gland
PTU307 for High Humidities
The PTU307 is for environment where relative humidity is very high,
near saturation. The warmed probe prevents the saturation of the sensor.
An additional temperature probe is also available.
The PTU307 RH+T probe is suitable for temperatures up to +180°C
(+356°F). Note that the operational temperature limit for the PTU307
probe is higher than for the PTU300 transmitter itself. The upper
temperature limit for barometric pressure measurement is +60°C (140°F).
See Appendix A on page 195 for a presentation of the following probe
installation kits for PTU307 with installation examples:
- Duct mounting kit
- Cable gland
- Pressure tight Swagelok connector
- Vaisala's Meteorological Installation kit
The installation kits are available for both humidity and temperature
probe.
Temperature Probe (Optional)
An additional temperature probe is available to measure the ambient
temperature on the PTU307 (with probe warming) and PTU30T
transmitter models. The additional temperature probe allows you to
measure other humidity quantities apart from dewpoint and mixing ratio.
The temperature probe must be connected to the transmitter at the
factory. Do not cut and re-connect the cable yourself.
You must install the additional temperature probe in the same
measurement environment as the PTU307 probe. Make sure that heat
does not transfer from the warmed probe to the temperature probe.