Uploaded December 2019 | Updated September 2026, 5 hours ago

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To ensure the GHL P4 is logging accurate data, the salinity, pH and Redox (ORP) probes must be calibrated. In this video, I walk through the various, and easy, steps required for getting the probes ready for use.
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Recommended GHL setup video - youtu.be/MAHHHw6YcEI
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Check me out on Instagram - @telegraham
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Camera - iPhone 7+, Sony a6000 and Insta360 One X
Mic - Blue Yeti
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Music - AveoAudio - Upbeat Energetic Sport