Hach, 2226995, Buffer Powder Pillows, pH 4.01 Color-coded Red, pk/15

pH Buffer standard solutions for laboratory and field analyses
pH Buffer Powder Pillows for pH electrode calibration. Each powder pillow prepares 50 mL of fresh buffer solution. Color-coded for easy identification (Red). pH is 4.01 ±0.02 at 25°C. Pack of 15 Powder Pillows
Traceable to NIST standard reference materials
Whether in the laboratory or in the field, always perform measurement results you can trust is essential. The quality of the standard pH Buffer Solutions that are used are key.
Design for use with Hach meters portfolio and other meters.
The basis for accurate pH measurements is good care and calibration of the pH Electrode.
Reliable packaging
Supplied in an airtight packaging ensuring guaranteed shelf-life.