Testers — pH/Ion pHTestrs® 10,20, and 30 Our most popular pHTestr® offers a larger display, with more information to make measurement easier Unique double-junction electrode design -For significantly longer electrode life, especially in harsh applications like wastewater, plating baths, life science, and food Waterproof, dustproof housing - IP67 rated, maintains the integrity of your tester even in dirty or damp field conditions. Plus, it floats! Replaceable electrode module - Reuse the same meter body for cost savings Push-button calibration with auto-buffer recognition Automatic temperature compensation (ATC) - Gives you accurate readings even with fluctuating temperatures Hold function - Freezes reading so that you can record it Self-diagnostic error messages - Make troubleshooting easier Auto shutoff - Extends the life of the batteries pHTestr 10 features - Three-point calibration, ±0.1 pH accuracy pHTestr 20 features - Three-point calibration, ±0.01 pH accuracy pHTestr 30 features - Three-point calibration, ±0.01 pH accuracy, and simultaneous temperature display All Oakton® waterproof pHTestrs float! WATSRPROOf Large LCD display Specifications CERTIFIED SUPPLIER meter only Three point at either pH 4.0, 6.86/7.0, or 9.18/10.0 Dimensions Unit only: 61/2" x 1V2" dia (16.5 x 3.8 cm) Boxed: 71/4" x 21/2" x 2" (18.4 x 6.4 x 5.0 cm) Weight Unit only: 3.25 oz (90 g); Boxed: 4.5 oz (125 g) Catalog number WD-35624-38 Replacement electrode sensor for WD-35634-70 pHTestr 10 calibration kit includes (two each of pH 4.01, 7.00,10.00 and rinse water), WD-35634-80 pHTestr 20 calibration kit includes (two each of pH 4.01, 7.00, 10.00 and rinse water), WD-35634-90 pHTestr 30 calibration kit includes (two each of pH 4.01, 7.00, 10.00 and rinse water), pHTestr 10, 20, and 30 Testr, calibration buffer pouches ', sample jar, and sturdy carrying case Testr, calibration buffer pouches , sample jar, and sturdy carrying case Testr, calibration buffer pouches , sample jar, and sturdy carrying case ...setting the standard again and again®