Multi Parameter Water Quality Tester S.G PH EC SALT ORP TDS CF TEMP 8 in 1 Rechargeable Online Monitoring for Aquarium US Plug 110V Item Type: Multi Parameter Water Quality Tester Material: ABS 8 In 1: S.G PH EC SALT ORP TDS CF TEMP Range: PH: 0.00-14.00pH ORP: -2000mv - +2000mv EC: 0-19000us/cm 0-199.0 ms/cm CF: 0-1999.0CF TDS: 0-19990ppm 0-199.0ppt Salt: 0-199.9ppt 0%-20% S.G: 0.990-1.400 Temperature: 0-50℃(32℉-122℉) Resolution: PH: 0.01PH ORP: 1mv EC: 1us/cm (<1999us/cm); 10us/cm (>1999us/cm); 0.1 ms/cm CF: 1CF TDS: 1 ppm (<1999ppm); 10 ppm (>1999ppm); 0.1 PPT Salt: 1ppm (<1999ppm); 10 ppm (>1999ppm); 0.1 PPT 0.01% S.G: 0.001 Temperature: 0.1℃(0.2℉) Accuracy: PH: ±0.03pH ORP: ±5mv EC, CF, TDS, SALT: ±2%F.S Temperature: ±1.0℃ Battery: DC6V Temperature Compensation: 0℃-50℃ Operating Temperature: 0℃-50℃ Product Size: Approx. 152 x 80 x 26mm / 5.98 x 3.15 x 1.02in