7 in 1 PH Meter Water Quality Tester with Backlight - Measures PH, TDS, EC, ORP, Specific Gravity, Water Salinity, and Temperature • 7-in-1 Functionality: Easily switch between PH, TDS, EC, ORP, S.G, salinity, and temperature measurements with the MODE/CAL button • LCD Display with Backlight: Clear digital readout ensures easy viewing in low-light conditions • High Accuracy: Advanced algorithm chip and electrode design provide fast, stable, and precise readings. Press HOLD/TEMP to lock the reading for convenient viewing • IP67 Waterproof Rating: Dustproof and splash-resistant, suitable for short-term immersion. Ideal for use in aquariums and other wet environments. Handle with care as the glass bulb is fragile • Wide Application: Suitable for testing drinking water, hydroponics, swimming pools, aquariums, laboratories, saltwater ponds, and seawater environments • EC Range: 0 to 10000 µS/cm, 10.01–19.99 mS, 20.1–400 mS/cm; Resolution: 1 µS/cm; Accuracy: ±2% • TDS Range: 0–1000 ppm, 1000–10000 ppm, 10.1–200.0 ppt; Resolution: 1 ppm; Accuracy: ±2% • Salinity Range: 0.00–25.00%; Resolution: 0.01%; Accuracy: ±0.1% (0.01–5.00%), ±1% (5.10–25.00%) • PH Range: 0.01–14.00 pH; Resolution: 0.01 pH; Accuracy: ±0.05 pH • ORP Range: 0 to ±999 mV • Specific Gravity (S.G): 1.000–1.222 • Temperature Range: 0.1–60.0°C (32.0–140.0°F); Resolution: 0.1°C/°F; Accuracy: ±0.5°C • TDS Conversion Factor: 0.4 to 1.0 adjustable • Power Supply: 3 x 1.5V LR44 button batteries (included) • 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 Includes: • 1 x Water Quality Tester • 4 x Calibration Powder Packets • 1 x English User Manual