pH 4 & pH 7 Buffer Solution in 20ml Sachets

A selection of 10 sachets.
5 of pH 4.01 buffer solution.
5 of pH 7.01 buffer solution.

Each sachet contains 20ml of solution and can be used to calibrate any of our pocket meter range, or any pH meter with a conventional pH electrode.

pH 4 Buffer Heath & Safety Sheet   
pH 7 Buffer Health & Safety Sheet