Waterproof PH pen

waterproof PH pen 1.High-accuracy:±0.01 pH 2.electrode easy to use 3.PH pen Range: 0.0 to 14.0 pH 4. PH pen Resolution:0.1 Ph 5 PH pen Temperature Compensation Automatic:0 to 50°C 6.Energy-saving province electricity type 7.Typical EMC Deviation:±0.1 pH 8.Calibration: Manual, 1 point, 9. PH pen Environment:0 to 50°C (32 to 122°F); 10.RH max 95% 11.Battery Type:4 x 1.5V alkaline 12.Battery Life :approx. 200 hours of use 13.Dimensions:152 x 30 x 21 mm (5.9 x 1.2 x 0.8") 14.Weight:53 g 15. PH PEN CALIBRATION • Immerse the tester up to the maximum immersion level in pH 6.86 buffer solution • Allow the reading to stabilize and using a small screwdriver adjust the calibration trimmer to read 6.9. Calibration is now complete. 16. Remove the protective cap. Do not be alarmed if white crystals