DWYER INSTRUMENTS 480 - ANEMOMETER,25 TO 400 FPM - ANEMOMETER, ROTATING VANE AND THERMISTOR SENSING METHOD, DATA LOGGING NO, HUMIDITY SENSING NO, VELOCITY (FPM) 25 TO 400 FPM, AIR VELOCITY ACCURACY +/-5 PERCENT, DATA HOLD NO, AUTO POWER OFF NO, INCLUDES...