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These floating testers have a large LCD, push-button calibration with buffer recognition (can be calibrated to 3 points), auto shut-off after 8.5 minutes, automatic temperature compensation and a user-replaceable double-junction sensor.
The pHTestr 10 reads -1.0 to 15.0, the pHTestr 20 and 30 read -1.00 to 15.00 and the pHTestr 30 has simultaneous temperature display in C or F. All have self-diagnostic messages such as battery power indicator and a hold function to freeze values for future use.
Measures 1.5" W x 6.5" L, weighs .3 lb. One-year instrument warranty, six-month electrode warranty. Calibration solutions sold separately.
pHTestr® is a registered trademark of Cole-Parmer Instruments Co.