For use with the Oakton hand held pH meters or any other pH meter that requires calibration before using. We recommend customers order this product in the non winter months to prevent product from freezing during delivery.

Choose a calibration solution that is closest to recommended pH level of the chemical you are using. If you are unsure at what level that should be choose level 7.0 to give you a good midrange calibration. If testing for soil pH choose a pH level of 7.0 which is closest to the range you are trying to reach

For complete explanation of pH meters see Planet School.

Specifications

• For use with our liquid pH meters
• Sold in pint containers
• Available in pH calibrating levels of 4.0; 7.0; & 10.0