Extech an100 thermo anemometer extech an100 the extech an100 cfm cmm thermo anemometer has a super large backlit lcd for the simultaneous display of ambient temperature and air flow or air velocity up to 8 easy to set area dimensions ft sup 2 sup or cm sup 2 sup are stored in the meter s internal memory supplied with a vane sensor with 120cm 3 9ft cable 9v battery protective rubber holster and carrying case extech an100 anemometer