The Testo 610 (0560 0610) Pocket-Sized Thermo-Hygrometer simultaneously measures relative air humidity and temperature. It is thus ideally suitable for fast checks on ambient conditions, e.g. in offices, production rooms, or in warehouses.Testo's patented humidity sensor guarantees the most reliable results, and the included calibration certificate confirms the sensor's high RH accuracy. Dewpoint and wet bulb calculation as well as a hold function and display of max. and min. values are also possible with the 610.