Functional Nanostructures and Sensors for CBRN Defence and Environmental Safety and Security by Anatolie Sidorenko & Horst Hahn

Author:Anatolie Sidorenko & Horst Hahn
Language: eng
Format: epub
ISBN: 9789402419092
Publisher: Springer Netherlands

(12.6)

The sensitivity of the frequency sensor of the gas is determined on the basis of expression (12.6) and is described by the equation

(12.7)

In Fig. 12.3, the transformation function is given, that is the dependence of the resonance frequency on the concentration of gas C. As can be seen from the graph, the transformation function has a nonlinear character.

Fig. 12.3Dependence of the frequency of generations on the concentration of gas

Figure 12.4 presents the dependence of sensitivity of the sensor on the change in gas concentration. The analysis of the graph shows that the highest sensitivity of the device lies in the range of 100–200 ppm and is 110 Hz/ppm, and in the range from 500 to 1500 ppm is 65 Hz/ppm, the least sensitivity is 61 Hz/ppm in the range zone 1500–2500 ppm.

Fig. 12.4Dependence of sensitivity on gas concentration

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