A Hot-Wire Anemometer (HWA) is a very basic instrument for measurements of turbulence intensity of air flow and for its frequency analyses. A HWA detects velocities from analog electrical signals continuously outputted from the CTA feedback circuit. The Hot-Wire sensors are very tiny, a diameter of about a few microns, and therefore bring high thermal responsiveness. Those small sensors enable to capture information of the microstructure of the flow. By traversing the probe, velocity distribution can be also measured.

The Smart CTA is a professional but easy-to-use Hot-Wire Anemometer. In a compact design, two CTA units are integrated, which enable not only a one-dimensional probe but also a two-dimensional probes to use just with one main unit. The Smart CTA offers the frequency response up to 20 kHz, so for most applications it can be employed.