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Auckland's beachgoers well know the frustration of being told to keep out of the water after heavy rain due to wastewater overflow, but researchers at Auckland University have been piloting flushable sensors designed to detect underground sewer faults.
The sensors are about the size of a USB stick, made from plant plastic and use ultra-high radio frequency to allow them to be detected as they move through the networks.
With some 8000 to 9000 sewer pipes under Aucklanders' feet, the sensors can help find misconne
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