PHTestr 10, 20, 30

Product Features: Large Display Screen - dual display LCD for enhanced readability, provides comprehensive meter information. Waterproof, Dustproof Housing - IP67 rated, maintains the integrity of your tester even in harsh conditions. Plus it floats!. User-Replaceable Sensor - reuse the same meter body many times. Double Junction Sensor offers longer lasting usage. Push-Button Calibration with Auto-Buffer Recognition - quick, easy calibration with no calibration mistakes. Automatic Temperature Compensation (ATC) - ensures optimum accuracy under fluctuating temperatures. Choice of USA or NIST pH buffer standards with up to 3 points. Temperature Display Readout simultaneously.