The IIT Gandhinagar, Gujarat team claims to have employed the first portable tunable diode laser spectroscopy (TDLS) system in the Indian context, which provides a highly localized reading of air pollution, be it outside the home or on the road.
The current system , employed by CPCB or SAFAR, has fixed devices and can’t ascertain the local impact of vehicular and other types of pollution.The device has to be kept at desired level-at ground level or a particular height-after which the laser beam, tuned for specific particle size and detection of specific components.
How this system works?
- A laser diode is fired against a photodetector in the device at the desired height.
- The laser detects specific molecules and dissonance reading is relayed to the amplifier and oscilloscope which appears as a graph on the software.
- The graph then can be decoded on the basis of the elements covered in the experiment.
Urban areas are battling pollution from multiple sources, from thermal power stations to vehicular population. A mobile Application is also developed to give real time readings. Compared to other systems, it is portable and can be fitted to a car or even buses, to create an exhaustive pollutant map.
Matter Referenced: Times of India, Ahmedabad, Sunday, 21st October, 2018.
By: Dr. Bhawana Asnani.
Happy to see Reviews, Additions, Suggestions and Comments, further.
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