Testo 0572 1754 175 h1 professional two channel temperature data logger testo 0572 1754 p this data logger from testo measures monitors and logs the temperature and relative humidity in buildings and closed rooms the logger comes with an external humidity sensor for shorter reaction times and a lock to prevent it from being easily stolen or tampered with p p in addition to the current temperature and humidity values the logger can also log and display dew point values other informatio