[Convenience Use] 5 seconds know the water quality, accuracy, faster. This Combo Set of TDS PH EC Temperature. Besides, it has the best price, reliable quality, all make it your first water quality test. [What is the accuracy? ] pH resolution is 0.01pH, accuracy 0.01pH. TDS: 0~9990ppm, Conductivity: 0~9990us/cm, accuracy: 2%. It is the same as the big resolution brand in Amazon, but the Pancellent test only need half price. [Durable Model] PH Pen have AUTO CALIBRATION function, no need any kind of screwdriver to calibrate the pH tester pen. TDS Pen have Lock & Auto Shut-Off Function. [Pocket Portable] Small size but suitable for testing the pH balance of drinking water, swimming pool, aquarium, reverse osmosis system, spa, or hydroponics. [Wide Application] Ideal for home and laboratory pH testing, including drinking water, electroplating liquid, boiler water, aquarium water, swimming pool water, photography flushing fluid, well water, deep groundwater, aquaculture, food processing and more. Product Description Little Money to Know Water Quality The TDS pH meter set is a professional level water tester. Application: pure water production and consumption, tap water, well water, seawater, aquarium, swimming pool water, soil, aquaculture, food processing, etc. Package Includes: 1 x PH Meter 1 x TDS Meter 6 x Calibration Packets 1 x User Manual How to Measure Prepare Remove the protective cap from the handheld meter Continue Reading Stabilize Press the ON/OFF button to turn on the device. Immerse the electrode into the target solution, ensuring the entire electrode is submerged. Gently stir the solution and wait for the value to stabilize. The LCD screen will display the result. How to Store Rinse the electrode with distilled water and let it dry. Specifications PH Meter Measuring Range: 0.00 - 14.00 pH Resolution: 0.01 pH Accuracy: 0.01 pH Automatic Temperature Compensation: 0 - 60/32 - 140 PH Meter Calibration: Two-point automatic calibration button Button Battery: 2 x 1.5V LR44 (continue to use more than 500 hours) Dimension: 155mm * 31mm * 18mm Weight: 50g TDS Meter Lock Function - makes it easy to read and record, press the HOLD button then remove from the test solution. 4 Display Modes: Press the SHIFT key: TDS - ppm & C, EC - s/cm & C, TDS - ppm & F, EC - s/cm & F. 5-minute auto-off function to prevent battery drain. TDS meter Measuring range: Conductivity: 0 - 9990 s/cm TDS: 0 - 9990 ppm (parts per million) Degrees Celsius: 0.1 - 80.0 C, Fahrenheit: 32.0 - 176.0 F Accuracy: 2% Net weight: 55g Size: 154 x 30 x 14 mm PH meter calibration 1, the calibration powder with 250 ml of distilled water or pure water to open. Dip the pH electrode into a mixed phosphate standard buffer at pH 6.86 and stir gently. 2, press the CAL button, automatic calibration will be carried out until the displayed value and the standard buffer solution at pH 6.9 compatible with room temperature. 3, the same as above, the electrode was inserted into a standard buffer solution of phosphoric acid potassium bicarbonate and phosphoric acid. 4, about two minutes or so. The displayed value should be within the error tolerance compared to the pH value of the buffer solution.