Generic Yellow Digital pH Meter Tester with ATC 0.0-14.0pH - Pen Type

Automatic Temperature Compensation (ATC) is a built-in feature that adjusts the pH reading based on the temperature of the solution being tested. pH electrode sensitivity varies with temperature, so ATC corrects for this drift, ensuring the displayed pH value is accurate to the standard reference temperature (usually 25°C). This is crucial for obtaining reliable, repeatable measurements in environments where solution temperature is not controlled.

This model typically requires calibration using standard pH buffer solutions (e.g., pH 4.01, 7.00, and 10.01). The specific calibration procedure (usually a one or two-point calibration) is detailed in the user manual. For maintaining accuracy, calibrate the meter before first use, whenever the batteries are replaced, and periodically during regular use—such as once a week for frequent applications or before critical measurements.

No, this pen-type meter is designed for testing liquids (aqueous solutions). To measure soil pH, you must first create a soil slurry or solution by mixing distilled water with your soil sample, allowing the solids to settle, and then testing the liquid supernatant. Directly inserting the probe into dry or compact soil can damage the sensitive glass bulb of the electrode.