| Brand | Unbranded |
|---|---|
| Type | pH Meter |
| Country of Origin | China |
Check the listing for details. 15 Pack pH Buffer Powder Calibration Solution 4.01 6.86 9.18 for Meter Tester 11. Condition: New, Made in China. Listed at 9.99 USD. If you have a swimming pool, aquarium or spa, you will need to conduct a pH test regularly. Step 2: Add 250mL of deionized water (or distilled water) to the beaker. -5 4.01 solution (potassium hydrogen phthalate).
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