Buffer Powders (4.00/7.00) for BlueLab pH Pens

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In order to keep your Bluelab pH pen as accurate as possible, you will need to calibrate using three of our pH buffer solutions. This buffer powder pack is used for calibrating Blu elab pH Pen To calibrate the - Pen Style pH Meter you will instead require - Buffer Powders (4.00/6.86/9.18). We would strongly recommend if you haven't used your pH meter in a while to always use a buffer solution before you start your brew. If you do not have any Storage Solution, we would also highly recommend you use this solution for storage after every use. Directions for use:1. Completely empty the powder into a clean 250mL glass beaker.2. Add 250mL of deinoized water to the beaker.3. Stir until the powder has completely dissolved.pH solution is accurate to (+/-) 0.01pH Show more