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Hanna Checker pH Tester (HI 98103)

716435 HANNA CHECKER PH TESTER (MSRP: $44.49)
716436 HANNA REPLACEMENT ELECTRODE (MSRP: $28.95)

At the cost of just a few rolls of litmus paper, you can have the industry's
best pocket-size pH tester. The Checker supplies you with fast and
accurate readings from 0.00 to 14.00 pH with a resolution of 0.01 pH. This
compact tester features a large easy-to-read LCD and a simple to perform
2-point calibration. The pH electrode of the Checker can be replaced;
simply unscrew the electrode from the meter body and screw on a new
one. The Checker is fast, accurate, lightweight and with 3000 hours of
battery life, you don't have to worry about frequent battery replacement.
Testing pH has never been easier!