Sound-resonance hydrogen sensor

Dong, Shuxiang; Bai, Feiming; Li, JieFang; Viehland, Dwight
June 2003
Applied Physics Letters;6/23/2003, Vol. 82 Issue 25, p4590
Academic Journal
A hydrogen sensor is reported in which a small piezoelectric-sound-resonance-cavity (PSRC) is used as the sensing element. Detection utilizes sound resonance and acoustic property differences between H[SUB2] and air as a sensing mechanism. Changes in H[SUB2] concentration result in a shift of the sound-resonance state of the PSRC. Preliminary experiments have demonstrated a sensitivity limit of 8 ppm, a fast response time ∼1.5 second, and detection capabilities over a broad concentration range 10[SUP-5]


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