Always keep a couple on hand! Don't get stuck doing a two point calibration with the green and pink juice that may have drifted out of calibration.
HI9814P is a quick calibration solution for use with Hanna’s HI9814 portable pH/EC/TDS meter. This solution allows for the quick single point calibration for pH and conductivity. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring freshness each time one is opened. Hanna’s line of calibration solutions have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened sachet.