1. Water quality pH meter, measuring range: 0 - 14 pH 2. Water quality pH level gauge. It is an electric meter used to measure the pH value of water quality. - pH measurement range: 0.0 - 14.0 pH - Resolution: 0.01 pH - Power supply: 2 pieces of 1.5V LR44 batteries (included) - Accuracy: ± 0.1 pH (20°C) ± 0.2 pH - Operating temperature: 0 - 60°C (32 - 140°F), with ATC system! - Calibration: Factory calibration, electronic calibration, two - point/three - point calibration - Dimensions: 153 mm x 29 mm x 16 mm - Weight: 51 grams 3. Electronic pH meter. It is an automatic pH water level gauge equipped with a large and easy - to - read display, which allows you to quickly evaluate the pH reagent level. The device is compact in size and convenient to use under various conditions. The measurement accuracy is within 0.01, and the measurement time is about 1 second. It is easy to use. 4. Applications: - Measuring the pH value of various liquids - Aquaculture - Gourmet cooking - Agriculture - Food industry - Chemical industry - Checking the quality and suitability of ethylene glycol solar fluid. The ATC function allows you to accurately measure the pH value regardless of the liquid temperature. 5. Measuring method: - Remove the device cover. The crystals appearing on the electrode surface are a natural phenomenon, so they must be removed before measurement. - Immerse the device in water until it reaches the liquid level indicated on the casing. Stir gently and wait for about 30 seconds until the display stabilizes. - Read the measurement value after completion. Don't forget to dry the device after each measurement. You can use a special electrode storage solution to protect the electrode. - Note! If the readings of the same liquid are different, use the provided solution and the calibration button on the casing to calibrate the meter. Refer to the device user manual for calibration instructions. 6. Device description: - LCD display - On/off button - Automatic calibration button - Protective cover 7. Package includes: - pH meter + batteries - 2 sets of 250 ml calibration reagents (pH 4.01, pH 6.86)