Tech Tip: SeaFET/SeapHOx pH Pre-conditioning

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The SeaFET/SeapHOx must condition to the deployment environment for at least 48 hours before pH data is considered reliable. The Shallow SeaFET’s external pH sensor must be powered and exposed to the deployment site’s water for 2–5 days before obtaining quality data. You will often see the external pH gradually rise until it meets the internal reference pH within ~0.05 pH after correcting for Temperature and Salinity. To help expedite this process, you can fill the wet cap with water from the deployment environment and power the instrument prior to deployment.

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