The HT4000 instrument was designed to basically perform air speed measurement with any kind of different selectable measurement units. This measurement is performed by using a external probe connected to the meter which also perform the air temperature/humidity measurement. Other available functions are the airflow (CMM and CFM) measurement and the atmospheric pressure with internal integrated sensor. HT4000 have the MAX/MIN/AVG and Data HOLD features more than a internal memory for saving measurement results of air speed test. A double LCD display with backlight and the auto power OFF feature it's also available
