P2.6 - Evaluation of Heater Temperature to Detect Gases in a Flowing Fluid

Ch. J. Hepp, F. T. Krogmann & G. A. Urban
In this contribution the behavior of a calorimetric flow sensor was investigated, at which only the temperature of the heater is evaluated. A time-dependent excitation (f = 1 Hz) was applied to the heating element with a constant power amplitude. The influence of different gases and flow velocities on the heater temperature were observed. Measurements and simulations were carried out in no-flow condition and in flowing fluids in order to obtain the restrictions regarding to...