In the heart of tropical regions, where rivers and streams play a pivotal role in the energy sector, a new, cost-effective solution for monitoring water levels has emerged. A team of researchers, led by Alain Pierret from the Université de Toulouse in France, has developed a self-contained, float-controlled laser gauge that promises to revolutionize hydrometry in these challenging environments.
The device, detailed in a recent study published in HardwareX (which translates to Hardware Science), is a game-changer for professionals in the water, sanitation, and drainage industries, as well as those in the energy sector who rely on accurate hydrological data. “This gauge is designed to be inexpensive, easy to build, and straightforward to use,” Pierret explains. “It’s a tool that can be deployed in remote locations without the need for an external power supply or solar panel, making it ideal for tropical environments.”
The gauge, costing around EUR 220, uses a float mechanism and a time-of-flight laser sensor to measure water levels with a precision of ±1 mm in temperatures ranging from 20 to 30°C. In controlled laboratory environments, it matches manual readings with an accuracy of within 2 mm. Field tests over a full tropical rainy season showed a mean absolute error of just 2.6 mm compared to a commercial gauge, the OTT-SE200.
The implications for the energy sector are significant. Accurate water level monitoring is crucial for hydropower generation, flood risk management, and water resource planning. The affordability and ease of use of this new gauge mean that more sites can be monitored more frequently, leading to better data-driven decisions.
Pierret and his team envision this technology shaping the future of hydrometry. “This gauge could be a stepping stone towards more advanced, autonomous monitoring systems,” Pierret says. “It’s a tool that can be adapted and improved upon, opening up new possibilities for research and practical applications.”
The study’s publication in HardwareX, an open-access journal dedicated to sharing hardware designs and best practices, ensures that the design and construction details are freely available to the global scientific community. This open-access approach is expected to accelerate the adoption and further development of the technology.
As the energy sector continues to grapple with the challenges of climate change and increasing demand, tools like this new water level gauge will be invaluable. They not only provide critical data but also offer a glimpse into the future of hydrometry, where technology is more accessible, more affordable, and more adaptable to the needs of professionals on the ground.