GrandSiri Pocket Pen Digital pH Tester Meter LCD Display Aquarium Pool Lab Monitor

This digital pen style pH meter is an ideal instrument for any aquarium, the fishing industry, swimming pools, school laboratories, food and beverage etc, Please be sure to calibrate with buffer solution before use, Measuring pH Range 0.0 - 14.0 pH, Resolution 0.1 Ph, Accuracy +/-0.1 pH (20C), +/-0.2 pH, Operating Temperature 0 - 50C (32 - 122F), Relative Humidity 95%, Calibration manual (Fluid not included) 1 point.