Nynelly 15 Pack pH Meter Buffer Calibration Solution Powder for Precisely Calibrate pH Meter, pH Tester Calibration Powder Packets, pH 4.00/6.86/9.18

• 【High accuracy】pH buffer calibration solution powder accuracy is ±0.01pH. Suitable with most of electronic pH meter ph tester.
• 【15 pack pH calibration solution powder】5 packets of pH 4.00 solution powder, 5 packets of pH 6.86 solution powder, 5 packets of pH 9.18 solution powder. Cost-effective and flexible in use, to meet your various needs.
• 【Easy to use】Mix pH buffer powder with 250ML distilled water, put the pH meter into the solution, stir gently and wait for a few seconds to get the result.
• 【High quality】pH calibration powder is produced with quality material under strict conditions. Sealed by durable moisture-proof individual packet to maintain freshness until use.
• 【Easy to carry and store】Small size, easy to carry and store, very convenient. CAUTION: Not a drinkable solution!

Product description Specifications: Accuracy: ±0.01pH at 77°F(25°C) ✔ 5 packets of pH 4.00 solution powder ✔ 5 packets of pH 6.86 solution powder ✔ 5 packets of pH 9.18 solution powder Directions for use: Step 1: Completely empty the powder into a clean, dry glass container. Step 2: Add 250mL deionized water (or distilled water) to the glass container. Step 3: Stir until the powder has completely dissolved. Step 4: Put the pH meter in the solution, stir gently, and wait a few seconds for the result. CAUTION: It is not a drinkable solution, please keep it out of the reach of children! Directions Completely empty the powder into a clean, dry glass container. Add 250mL deionized water (or distilled water) to the glass container. Stir until the powder has completely dissolved. Put the pH meter in the solution, stir gently, and wait a few seconds for the result.