Selective quantification of humidity and ammonia by optical excitation of molecular semiconductor-doped insulator (MSDI) sensors

MSDI (molecular semiconductor-doped insulator) ammonia sensors have been investigated using cyclic optical excitation as multi-signal generation method. This method enables a selective quantification of both humidity in the range of 30–70 %rh and ammonia concentration in the range of 0–30 ppm with a single sensor at room temperature.