Water Testing Meter 6 in 1 PH EC TDS ORP TEMP Residual Chlorine Water Tester Pen for Swimming Pool Item Type: Water Tester Material: ABS Color: As Picture Shown Application: for Drinking Water, Aquarium, Laboratory, Swimming Pool, Fish Tank, Irrigation, etc Product Size: Approx.160x80x80mm/6.3x3.1x3.1in Gross Weight: Approx.320g/11.3oz Battery: 3 x AAA 1.5V Battery (Shipped Without Battery) PH Range: 0.1-14.0pH Resolution: 0.1 PH PH Range: ±0.1pH CL Range: 0.1 4.0 Mg/L Resolution: 0.1 Mg/L EC Range: 0-1999 Mu S/Cm; 2000-10000 Mu S/Cm 10.01 20.0 MS/CM Resolution: 1μS/Cm; 10 Mu S/Cm; 0.01 MS/Cm; Accuracy: ±2%F.S TDS Range: 0-999 Parts Per Million; 1000-9990 PPM. Resolution: 1 PPM; 10 PPM. Accuracy: ±2%F.S ORP Scope: -1200~+1200m Resolution: 1mV Accuracy: 15mV TEMP Range: 0.1°C-80.0°C；32.1°F-176°F Resolution: 0.1°C；0.1°F Accuracy: ±0.5℃ Calibration (Check Calibration Record) PH: 6.8/4.0/9.2 Or 7.0/4.0/10.0 EC/TDS: 1413μS/cm; 12.88 mS/cm；111.8mS/cm ORP: 256mV ATC Temperature: 0.1°C-60.0°C Ambient Temperature: 0.1°C-80.0C Relative Humidity: Maximum 90% TDS Coefficients: 0.1-3.0 (Factory Default 0.5) EC Temperature Compensation: 0.1-3.0%/°C (Factory Default 2.0%/°C) Bluetooth: Mobile Bluetooth Supports Version 5.2 Backlight: With Backlight, Support Movement Control Data: Save: As An Excel Worksheet Printing: Support Waterproof: IP67 Data Store: Indicates Latest 1000 Records