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Sensor response to 100 ppm of hydrogen at different values of humidity: 1, air, RH80; 2, 100 ppm H2, RH80; 3, air, RH80; 4, air, RH60; 5, 100 ppm H2, RH60; 6, air, RH60; 7, air, RH40; 8, 100 ppm H2, RH40; 9, air, RH40; 10, air, RH30; 11, 100 ppm H2, RH30; 12, air, RH30.
