YIERYI pH Meter, Digital 4-in-1 pH ORP H2 Temp Meter, Hydrogen Tester with ATC, 0.01 Resolution High Accuracy pH Tester for Drinking Water

4-in-1 pH tester, which can measure PH, ORP (Oxidation-reduction potential), H2 (Hydrogen content), and Temp value with high precision at the same time, simply press the {MODE/CAL} key to switch the readings of pH, ORP (mV), and H2 (ppb/ppm).

The pH meter features a high-sensitivity glass probe, offering a complete measurement range from 0 to 14 pH with a remarkable 0.01 pH resolution. To ensure measurement accuracy, our pH meter employs a meticulous three-point calibration process, which involves precise adjustments using pH solutions at 4.00, 6.86, and 9.18. Our ORP and H2 meters come pre-calibrated for your convenience.

Temperature will affect the reading level, and automatic temperature compensation can ensure that you get the best reading. compared with other pH meters for water, there is only a range of 0°C-50°C. our digital pH meter has a better range of 0°C-60°C (32°F-140°F). therefore, it can solve the possible errors caused by the perfect change of liquid temperature, so as to make the pH reading more accurate.

The automatic power-off function turns off the power after 5 minutes without any operation to save power. The pH meter features a green backlit LCD to help you obtain the measurement results clearly in any situation. Press the "HOLD/TEMP" key to lock the reading, helping to easily record the reading.

Ideal for household and laboratory pH testing applications, including drinking water, swimming pool, water treatment, pond, water purification, aquariums, hydroponics, laboratory, etc.