Model VT-200 Vane Thermo-Anemometer, the perfect device for balancing air conditioning and heating ducts or checking the operation of fans and blowers. It is capable of measuring air volume in cubic feet per minute and cubic meters per minute. The device allows you to measure air velocity in ft/min, m/s, knots, km/hr, and mph with ±3% accuracy. The innovative multifunctional LCD can display both air velocity and temperature in selectable units or air flow and air area. Fitted with a built-in datalogger to help store a thousand measurements. Can also make use of RS-232 communication to transfer data to PC. Data hold and record/recall minimum, maximum and average readings are other features of the device. Comes with the following accessories: RS-232 interface, PC Windows software, cable, battery, carrying case, and instruction manual.