AIR QUALITY MONITOR On-screen prompts and step-by-step instructions guide the user through operation, instrument setup and field calibration. The Q-Trak IAQ Monitor 7575 also features an ergonomic case design with probe holder and a keypad lockout to prevent tampering during unattended use. The Q-Trak IAQ Monitor 7575 is designed to work with a wide range of plug-in probes which expands measurement capability. Features overview Simultaneously displays CO2, CO, temperature and humidity measurements Calculates dew point, wet bulb and percent outside air Large graphic display Displays up to 5 measurements On-screen messages and instructions One instrument with multiple plug-in probe options including VOC’s and air velocity Store up to 39 days of data collected at one-minute log intervals TrakPro™ data analysis software provided for data logging, analysis and documenting results Bluetooth communications for transferring data or remote polling Technical Operating temperature      5 to 45 °C Storage temperature      - 20 to 60 °C Logging capability      Range logs up to 56,035 data points with key (4) measured parameters enabled, 39 days at 1 minute log intervals Time constants      1 sec, 5 sec, 10 sec, 20 sec, 30 sec (user selectable) Log intervals      1 second up to 1 hour (user selectable) Meter dimensions      9.7 cm x 21.1 cm x 5.3 cm Weight (with batteries)      0.36 kg Power requirements      x4 AA size alkaline batteries or AC adapter.