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TDS Pen Calibration Solution


This liquid solution is used to calibrate the electrodes for your TDS Pocket Tester Pen. Keep your pen in top performing shape to accurately test your pool or spa water. Solution is designed for 25 degrees C, at 1382 ppm, and is packed in a convenient, single use 20 mL sachet.

A liquid solution to calibrate the TDS Pen Tester.

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