The Extech AN200 has 3% velocity accuracy which can be achieved with the aid of a low friction 2.83″D (72mm) ball bearing vane wheel. This wheel hangs on a 3.9ft cable that is attached to the device. The thermo-anemometer has internal memory with which it stores the easy to set area dimensions (cm²). Extech AN200 can display the Air Flow and Air Velocity with Ambient Temperature all at the same time on its super large (9999 count) backlit display.

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