Extech AN200-NIST CFM-CMM Digital Thermo-Anemometer with NIST Calibration Certificate comes with built-in non-contact IR Thermometer. Extech AN200-NIST- NIST Calibration Certificate -CFM/CMM Thermo-Anemometer measures Air Velocity, Air Flow (volume) and Temperature. The large, easy-to-read backlit LCD includes primary and secondarydisplays plus numerous status indicators. The Extech AN200-NIST meter is shipped fully tested and calibrated and with proper use will provide years of reliable service.