Which institute developed the low-cost portable optical sensing device “E-Eye”?

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The correct answer is Option C: IIT Guwahati. IIT Guwahati developed “E-Eye”, a low-cost portable optical sensing device for rapid detection of toxicants and cancer-causing heavy metals in water and biological samples. E-Eye is based on the Beer-Lambert law, which establishes a relationship between light absorption and the concentration of substances in a sample. The E-Eye device converts chemical colour intensity into digital readings and enables wireless data transmission for on-site testing. E-Eye was developed at an approximate cost of ₹3,500, with a per-sample testing cost of around ₹2, making it a low-cost analytical instrument. The device detected contaminants including arsenic, lead, iron, chromium, fluoride, and Escherichia coli during laboratory validation of more than 2,700 samples. Escherichia coli is used as a microbiological indicator of faecal contamination in water, while arsenic and lead are toxic heavy metals harmful to human health. The E-Eye research project was led by Prof. Tapas K. Mandal and Prof. Harshal B. Nemade of IIT Guwahati and was published in the IEEE Sensors Journal. The project received support from the Ministry of Electronics and Information Technology linked to the Jal Jeevan Mission, and ENVIONIX Labs Pvt Ltd was established for commercialisation of the technology.

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IIT Delhi

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IIT Bombay

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IIT Madras

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IIT Kanpur

Which institute developed the low-cost portable optical sensing device “E-Eye”?

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Which institute developed the low-cost portable optical sensing device “E-Eye”?

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