These come in plastic envelope packets and are extremely accurate and field portable.
- pH 4.000 +/- 0.002
- pH 7.000 +/- 0.002
- pH 10.000 +/- 0.002
Each packet contains ample fluid for calibration (about 30 ml).
There is a free sample of these included with each PINPOINT® pH Monitor and PINPOINT® pH Controller.
All electronic pH instruments should be calibrated monthly.