Shown below is a configuration of the same HD32.3TC instrument with a wet bulb temperature probe. In this case, the wet bulb temperature is directly measured, in compliance to ISO 7243.
HD32.3TC can be configured in various ways for thermal comfort, indoor air quality and microclimate analysis. Please refer to the data sheet of HD32.3TC for more details.
Shown above is a 50 mm diameter globe thermometer, with Class A 4-wire PT100 sensor. The model is Delta Ohm TP876.1.I. An alternative model with 150 mm diameter (TP875.1.I) is also available. Refer to the instrument datasheet for more information.
For the working principle of globe thermometers, please refer to this article.
With the 3 probes connected (globe thermometer probe, combined temperature & humidity probe, and air speed probe), it is possible to display either PMV/PPD results or WBGT (both indoor and outdoor) results, as shown below: