Water Quality Meter ORP PH TDS TEMP EC Salinity SG 7 in 1 Accurate Digital Water Testing Pen with Powder Item Type: Water Quality Tester Material: ABS Measure PH, TDS, TEMP, EC, Salinity, SG, ORP EC: Range: 0-10000us/cm, 10.01-19.99mS/cm, 20.1-400.0mS/cm (Auto Conversion Range), Resolution: 1uS/cm; 0.1mS/CM; Accuracy: ±2% F.S TDS: Range: 0-10000ppm, 10.1-200.0ppt (Automatic Conversion Range), Resolution: 0.1ppm; 0.1ppt Accuracy: ±2% F.S Salinity: Range: 0.01%-25.00%, Resolution: 0.01%, Accuracy: 0.01-5.00% (±0.1%) 5.1-25.0% (±1%) PH: Range : 0-14.00pH, Resolution : 0.01pH, Accuracy : ±0.05pH SG: 1.000-1.222 ORP: ±999mv Temperature Range: 0.1-60.0°C, 32.0-140°F Battery: 3 x LR44 (Shipped without Battery) Waterproof Rating: IP67 Weight: Approx. 162g/5.7oz Use: Applicable to drinking water, aquaculture, swimming pools, etc, for the determination of various values of water quality