Energy + Climate + Nature

Energy + Climate + Nature

Duration
2013 - 2016
Phase Awarded
Prize Purse
$2 Million

Designed to understand and protect our oceans in a changing climate, this prize challenged teams to develop affordable, accurate pH sensors capable of measuring ocean chemistry at a range of depths—unlocking critical data for marine health and climate science.

Impact

±0.001 pH accuracy—sensors achieved unprecedented precision for long-term global ocean monitoring.

3,000 meters–sensors operated flawlessly at extreme deep-sea depths.

5× market growth—the ocean pH sensor industry expanded fivefold after the prize.

Winners

Sunburst Sensors’ SAMI technology measures pH and CO₂ in oceans, lakes, and rivers with record precision, even at 3,000m depth—enabling vital climate and ecosystem research worldwide.

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The ocean plays a central role in regulating Earth’s climate, but until recently, we lacked affordable, accurate tools to measure ocean chemistry. Without better data, scientists struggled to track acidification and its impact on marine ecosystems.

The competition sought low-cost, robust sensors that could measure pH and CO₂ levels in real time—from surface waters to deep sea. These tools would unlock more consistent, global monitoring of ocean health, guiding research and policy with hard data.

The $2M Wendy Schmidt Ocean Health XPRIZE was launched in 2013 to revolutionize how we measure ocean acidification—a key driver of marine ecosystem collapse and a hidden consequence of rising CO₂ emissions. At the time, collecting this data was expensive, limited to a few institutions, and not feasible on a global scale.

The prize challenged innovators to build affordable, accurate, and durable sensors that could measure pH and carbon dioxide in seawater under real-world conditions—including in labs, near the surface, and at depth. Final testing took place at the Seattle Aquarium, the Monterey Bay Aquarium Research Institute, and in deep waters off the coast of Hawaii.

Sunburst Sensors, a small Montana-based company, emerged as the winner, outperforming larger competitors with their versatile and cost-effective Submersible Autonomous Moored Instrument (SAMI) systems. Their technology successfully collected data nearly two miles beneath the ocean surface—and has since been used in studies ranging from African coastlines to the Great Lakes.

By lowering the cost and increasing access to vital ocean chemistry data, this prize laid the foundation for a new era of open ocean science—one in which accurate environmental data can inform global decisions, protect ecosystems, and monitor the impacts of climate change.

Launched in 2013, the competition concluded in 2015. Final testing took place at ocean research facilities in Seattle, Monterey Bay, and Hawaii. Sunburst Sensors was awarded first place for both affordability and accuracy in real-world trials.

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