Pyroelectric-Based Gas Sensors

It is important to note that all ferroelectric crystals possess piezoelectric and pyroelectric properties. It was also found that all pyroelectric materials are piezoelectric, but the opposite is not true. For example, quartz is piezoelectric but not pyroelectric. At the same time zinc oxide with its wurtzite 

Sensor type Transducer type Detected gas Threshold sensitivity (ppm) Response time (s) 

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