The behaviour of the constant-temperature hot-wire anemometer as the resistance ratio becomes very low is examined in terms of the static and dynamic response. It is shown that a constant temperature anemometer may be used to measure temperature fluctuations but its usefulness is limited by the nonlinearity of the sensitivity. Systems which employ an amplifier with a frequency-dependent gain give rise to a step change in the sensitivity of the response at low frequencies. This step may be significant at all resistance ratios but generally increases as the resistance ratio decreases.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Physics and Astronomy(all)