Digital PH Meter PH Meter High Accuracy Water Quality Tester with PH Measurement Range for Household Drinking Pool and Aquarium Water PH Tester

This digital PH testing pen is high quality and highly accurate for measuring range of 0-14 PH, 0.1 PH resolution, measure & display pH result simultaneously with LCD display, making it reliable and quick reading. Easy to, just remove the protective cap and immerse the PH meter electrode in the solution and turn on the PH by "ON / OFF" switch to be measured. So much easier than trying to see the colors of a litmus strip. Easy to calibrate, you can simply follow the instruction on the provided packet of solution 4.01 or 6.86, immerse the PH tester in the solution until numbers get stable. 2” wide, 1½” deep, 7” long.