Electrode 1 has been properly cleaned before calibration. " Electrode 2 has not been properly cleaned. • Expiration date · The production batch number and expiration date are reported on all Hanna calibration solutions. • Air-tight bottles · Air-tight bottle with tamper-proof seal of freshness to ensure quality. • Single use sachets · Opaque packaging prevents oxidation from UV light that could alter the value. Every sachet is as fresh as the day it was packaged. • FDA compliant bottles (HI80xx) · Hanna solutions are offered in opaque bottles that meet FDA requirements. Electrodes can become dirty from use and will produce inaccurate results even as they read correctly in a pH buffer. Hanna’s cleaning solutions eliminate impurities and residues that are left on electrode surfaces when immersed in samples during measurement and stored incorrectly. Hanna suggests cleaning the bulb and junction of your electrode on a regular basis to ensure that the probe is always clean and prevent any clogging of the junction. Electrode Cleaning Solutions for a Top Performing Sensor 2 pH 2.172 | www.hannainst.com solutions
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