Gymark NEW 15Pcs PH Meter Buffer Solution Powder for Precise Calibration Easy US

- Item Specifics - If you have a swimming pool, aquarium or spa, you will need to conduct a pH test regularly. However, troublesome liquid solutions may not provide you with the accuracy you need. Let go of the measuring cup and choose the convenience of pre-measurement. specification: -5 * 4.01 solution (potassium hydrogen phthalate) -5 * 6.86 solution (mixed phosphate) -5 * 9.18 solution (Borax) User's guidance: Step 1: Pour the powder completely into a clean 250mL glass beaker. Step 2: Add 250mL of deionized water (or distilled water) to the beaker. Step 3: Stir until the powder is completely dissolved. Step 4: Calibrate the pH meter according to the Esee pH meter calibration procedure (for Esee PH meter: B01LWMJVPG) Note: Not drinkable! Package includes: 15PCS Warming Tips: Computer monitors display colors quite differently,the color of the article may vary slightly from the pictures above. Please allow 1-2cm differences because of the manual measurement. The images are for reference only. please take the item you get as the standard.

5 * 4.01 solution (potassium hydrogen phthalate) 5 * 6.86 solution (mixed phosphate) 5 * 9.18 solution (Borax) Package includes: 15PCS