Printable electric sensor monitors plant hydration

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Designed by a team of engineers at the Massachusetts Institute of Technology (MIT), the electronic ink sensor is made from dissolved carbon nanotubes. The ink does not hurt the plant and is printed across a single stomata (pore) on a leaf. The stomata opens whenever the plant comes into contact with light and heat in order for the plant to intake carbon dioxide and release oxygen and water when necessary. By tracking the opening and closing times of the pores, a farmer could predict – far earlier than by visual detection alone – when drought conditions are imminent.

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