The testo 622 thermo hygrometer and barometer is ideal for monitoring the ambient air. The meter measures the air temperature, relative humidity and the air pressure at a rate of once every 10 s and displays the values - incl. the time and date - on the large easy-to-read display. A visual LED alarm alerts the room`s occupants when a threshold has been exceeded. Allows you to keep an eye on ambient air values, especially in laboratories during calibration or when running experimental setups. Items supplied: testo 622 thermohygrometer and barometer, calibration protocol, wall and table mount, 4 x AA batteries. The testo 622 thermo hygrometer and barometer is ideal for monitoring the ambient air. The meter measures the air temperature, relative humidity and the air pressure at a rate of once every 10 s and displays the values - incl. the time and date - on the large easy-to-read display. A visual LED alarm alerts the room`s occupants when a threshold has been exceeded. Allows you to keep an eye on ambient air values, especially in laboratories during calibration or when running experimental setups. Items supplied: testo 622 thermohygrometer and barometer, calibration protocol, wall and table mount, 4 x AA batteries.