Portable water quality analyzer, high definition display screen, manual one key automatic calibration mode, the top adopts nice sealing process to prevent energy consumption in wet environment, accurate measurement, simple and quick. Features: Pen cover design, easy to carry, not easy to damage, no loss of sensitivity. Portable water quality analyzer, home use, hospital natatorium, water plant laboratory, aquaculture. High definition display screen, quick and simple accurate measurement, large digital display more clearly. Manual one key automatic calibration mode, solve the problem that the long storage time of automatic calibration can not be accurately calibrated. The top adopts nice sealing process to prevent energy consumption in wet environment. PH pen is electrode probe, heat and cold resistant, high sensitivity. TDSandamp EC pen is titanium alloy probe, high hardness, anti-rust and oxidation resistance. Specifications: Type: Single Yellow PH Pen White TDS Pen andamp Yellow PH Pen White TDS Pen andamp PH Pen Blue TDS Pen andamp Yellow PH Pen Blue TDS Pen andamp White PH Pen (optional) Measuring Project: PH, TDSandamp EC TDS Measure Range: 0-9990ppm TDS Tempreture Measure Range: 0.1-80 or 32-176 TDS Error: 2 percent TDS Cell: 1 x CR2032 Button Cell, 3V 240mAh (included) TDS Probe: Titanium Alloy PH Measure Range: 0-14 PH Accuracy: 0.01 PH Error: 0.05 PH Cell: 2 x LR44 Button Cell, 3V 240mAh (included) PH Probe: Electrode Package Weigth: 106g or 3.74ounces 190g or 6.70ounces Package Size: 150 x 30 x 20mm or 5.91 x 1.18 x 0.79in 200 x 110 x 20mm or 7.87 x 4.33 x 0.79in Packing List: 1 x PH Test Pen 1 x TDSandamp EC Test Pen 6 x Corrective Powder 2 x Instruction Book