Shown below is a wireless data logger from Senseca for temperature, humidity, pressure, CO2 and VOC index measurement:
Shown below is the screenshot from the data logger software. An HD35APD base unit is used by this customer.
The absolute humidity and wet bulb temperature are calculated from the temperature and relative humidity.
This instrument is great for long-term indoor thermal environment and air quality monitoring. The instrument is powered by USB, and it is possible to be powered by standard phone chargers or power banks.