Bluelab pH Pen | Waterproof pH & Temperature Meter, 0.0-14.0 pH Humidity & Storage Interchangeable Blades for Flexibility: The

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Bluelab pH Pen | Waterproof pH & Temperature Meter, 0.0-14.0 pH Humidity & Storage Interchangeable Blades for Flexibility: TheWhat the Bluelab pH Pen Reads and How Accurately A pH reading that drifts is worse than no reading, because you feed on it. This pen covers 0. 0 to 14. 0 pH at 0. 1 resolution and holds 0. 1 pH accuracy at 25C. A double junction probe does the work. It also reads solution temperature across 0 50C 32 122F and compensates automatically, so a cold reservoir at lights on does not throw the number. The body is fully waterproof and the LCD is backlit for a