Bellevue-based Sea-Bird Scientific is part of a team that won a $250,000 prize in the Wendy Schmidt Ocean Health X-Prize competition to develop better sensors to track changing ocean chemistry.

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Bellevue-based Sea-Bird Scientific is part of a team that won a $250,000 prize in the Wendy Schmidt Ocean Health X-Prize competition to develop better sensors to track changing ocean chemistry.

Working with scientists at Scripps Institution of Oceanography, Monterey Bay Aquarium Research Institute and Honeywell Aerospace, Sea-Bird developed an instrument to make reliable measurements of pH in the deep ocean.

Such measurements are vital to understanding the way greenhouse gas emissions are being absorbed into the world’s oceans and raising their acidity.

More than 75 teams from around the world entered the competition, which included a round of tests at the Seattle Aquarium earlier this year.

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Both top prizes, totaling $1.5 million, went to Sunburst Sensors, of Montana.

Sea-Bird snagged second place in the accuracy category.

The group is donating the prize money to the Argo ocean observing program, which deploys fleets of robotic buoys — many designed at the University of Washington — to measure ocean conditions around the globe.