7 in 1 PH Meter Water Quality Tester PH/TDS/EC/ORP/S.G/Water Salinity/Temp Pen Tester - With Backlight • 7 in 1 PH Meter: This pH meter features 7-in-1 functionality. Simply press the {MODE/CAL} key to switch between measuring PH, TDS, EC, Salinity, Temperature, ORP, and S.G. • LCD Display: The digital water meter has an LCD screen with backlight for clear data visibility. • High Accuracy PH Tester: Equipped with a high precision algorithm chip and electrodes for accurate and fast response. Press the HOLD/TEMP button to lock the reading once stabilized for easy viewing. • IP67 Waterproof Grade: Resistant to dust and short-term immersion. Can be used even if accidentally dropped into water. The glass bulb at the tip is fragile; handle with care during use and cleaning. • Wide Application: Suitable for testing drinking water, hydroponics, swimming pools, aquariums, laboratories, and more. Measures salt content in saltwater ponds, koi ponds, seawater, oceans, and fish tanks. Specifications: • Material: Plastic • EC Measurement Range: 0 to 10000 µS/cm, 10.01–19.99 mS, 20.1–400 mS/cm • Resolution: 1 µS/cm; 0.1 mS/cm • Accuracy: ±2% of reading • TDS Measurement Range: 0 to 1000 ppm, 1000 to 10000 ppm, 10.1 to 200.0 ppt • Resolution: 1 ppm • Accuracy: ±2% of reading • Salinity Measurement Range: 0.00 to 25.00% • Resolution: 0.01% • Accuracy: 0.01–5.00% (±0.1%), 5.10–25.00% (±1%) • PH Measurement Range: 0.01–14.00 pH • Resolution: 0.01 pH • Accuracy: ±0.05 pH • ORP Measurement Range: 0 to ±999 mV • S.G. Measurement Range: 1000–1222 • Working Environment: 0 to 60.0°C (32.0–140.0°F); Relative Humidity 100% • TDS Coefficient: 0.4 to 1.0 • Temperature Range: 0.1–60.0°C (32.0–140.0°F) • Temperature Accuracy: ±0.5°C • Temperature Resolution: 0.1°C/°F • Power Supply: 3 x 1.5V LR44 button batteries, 150 mAh • Display Size: 33 x 24 mm • Dimensions: 183 x 37 x 37 mm (7.2 x 1.5 x 1.5 inches) • Weight: 105 grams (3.2 ounces) Package Included: • 1 x Water Quality Tester • 4 x Calibration Powder • 1 x English User Manual • Other items not included