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Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Hanna pH Meters and Accessories

Help in selecting the correct electrode can be viewed at Electrode Selection Guide

Hints on Electrode Maintenance
Hanna Instruments is the leading manufacturer of portable, benchtop and specialty pH meters for the discriminating scientist. In addition to pH meters, Hanna also offers an impressive array of electrodes, standards and solutions for a variety of applications.
Hanna benchtop pH meter
Hanna pH/ORP/ °C meter
Hanna portable pH meter