This is a 4.01 buffer solution from Hanna Instruments that can be used to calibrate pH meters. The sachet contains roughly 20mL of buffer solution. It is for the pH 4 range, and can be used with pH meters that measure into the hundredths place. Make sure you have extra buffers on hand so that you can properly calibrate your pH meter and be confident in your readings every time!
- 4.01 buffer solution
- Helps keep your pH meter properly calibrated!
- Lab grade