NOVEL APPROACH IN RATIOMETRIC TECHNIQUE OF SENSING

Vladimír Tvarožek - Erik Vavrinský - Zdeněk Řezníček

   A novel method of ratio and relation measurement is introduced. On the basis of this principle, asymmetric ratio resistance and conductance microsensors have been developed which are set to an arbitrary relation temperature or electrochemical concentration. The combined resistance temperature sensor allows both to adjust its sensitivity to the defined value by trimming the asymmetry resistor resistances and to increase the accuracy 10 times in comparison with the classical ratio-metric arrangement. The electrochemical conductance micro-sensor is able to monitor the concentration changes in &mu mol/L range with constant sensitivity adjustable by the frequency of the supply voltage.

Keywords: ratiometric technique, relation measuring systems, resistance sensors, temperature, electrochemical conductance

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