https://cleanflow.net/products/hach-2299264-buffer-powder-pillows-ph-4-01-ph-7-00-10-each-20-pk.js
Hach 2299264 Buffer Powder Pillows, pH 4.01 & pH 7.00, 10 Each (20/pk)
Hach 2299264 Buffer Powder Pillows, pH 4.01 & pH 7.00, 10 Each (20/pk) for pH electrode calibration. Each powder pillow prepares 50 mL of fresh buffer solution.
-
Colour-coded for easy identification. pH is ±0.02 at 25°C.
-
Pack of 10 pillows of pH 4.01 (red) and 10 pillows of pH 7.00 (yellow).