Digital pH water meter suitable for home and laboratory use. Ideal for checking the pH balance of drinking water, pools, aquariums, RO systems, spas, or hydroponics.

Digital water hardness tester for reliable and quick measurements of water solution purity.

Calibration steps for pH meter:

• Prepare 3 pH cups: 4, 6.86, 9.18 calibration solution.
• Place the pH meter in the cup with pH 6.86 and press CAL.
• Rinse the electrode with distilled water.
• Repeat the process with the pH 4 and 9.18 solutions.

Calibration step for TDS meter:

• Prepare a cup of water with 500 ppm.
• Press the ON button and insert the pen.
• Press and hold shift for 5s to release.
• The TDS meter will be calibrated to 500 ppm.

Notes:

• The pH meter has been pre-calibrated by the manufacturer.
• The TDS meter is self-calibrating.
• The auto shut-off feature saves batteries.
• Do not immerse the instrument in the solution to avoid short-circuiting.