The device, known as a waterpoint data transmitter, is fitted into handpump handles, and automatically monitors the number of strokes made when a pump is operated. This data, which provides estimates of daily and seasonal demand, including critical under- or over-usage information, is then transmitted to a central hub - thus informing engineers, cheaply and regularly, of the need for repairs, and helping to ensure a constant flow of water.

The researchers will trial their idea, which is known as the 'Smart Handpumps' initiative, in 70 villages in Kenya in August. A prototype transmitter was successfully trialled in Zambia in 2011. The researchers hope to expand the technology to other African countries, including Malawi, South Sudan and Zambia.