Academic Research
While most academic research has concentrated on high resolution instruments, some work has gone in the opposite direction. In the last twenty years, very low cost instruments for applications such as leakage detection and for the control of carbon dioxide concentration have been developed and commercialized. Typically, low cost thermal sources are used which are modulated electronically. Diffusion through semi-permeable disks instead of valves for gas exchange, low cost microphones and proprietary signal processing with digital signal processors has brought down the costs of these systems. The future of low cost applications of photoacoustic spectroscopy may be the realization of fully integrated micromachined photoacoustic instruments.
Read more about this topic: Photoacoustic Spectroscopy
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