The instrument is said to be ideal for facilities and estates managers, museums, officers and warehouses. The Testo 623 shows current and past measurement values in a large, easy-to-read display. The user can view either the humidity or the temperature values of past days in the histogram, displaying the measurement values for the past hour, two hours, 12 hours, 24 hours or 12 days. In total, the Testo 623 stores the data from the past 12 weeks.
In addition to temperature and humidity, the Testo 622 also measures pressure, and is of particular interest for applications in laboratories. Its large and easy-to-read display shows the current measurement values as well as date and time. Testo said it provides all important values for protocols at a glance. A reminder function informs the user when the next calibration is due. Using optional calibration and adjustment software from Testo, the user can carry out the calibration and the adjustment directly on site.