Know your pH in seconds with a pen that thrives in the grow room
The Bluelab pH Pen reads pH from 0.0 to 14.0 at 0.1 resolution and shows solution temperature on the same backlit screen. It is fully waterproof (not just splash-resistant) and floats if it lands in your reservoir. Bluelab builds it in New Zealand with a double-junction probe for longer life in nutrient-heavy solutions, and it ships with pH 4.0, pH 7.0, and KCl storage solution so you can calibrate and start measuring the same day.
Fully waterproof 1-year warranty Made in New Zealand
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