Features: APERA's unique Replaceable BPB (Brush-resistant Platinum Black) probe ensures high accuracy and consistency in a wide-range conductivity measurement EASY Auto Calibration with auto buffer recognition; Auto Temp. Compensation (ATC) ensures accuracy in variant temperatures (0-50.0°C) LARGE CLEAR LCD with 2 backlit colors (indicating 2 different modes), DUAL Display of temp./EC, and indications of completed calibrations and stable readings EASY Switch from EC to TDS/Salinity with customizable TDS factor (0.40-1.00) Complete kit with ready-to-use calibration solutions, calibration bottles, AAA batteries, and a lanyard all in a portable carrying case. Conductivity Range 0 to 200.0 μS; 0 to 2000 μS; 0 to 20.00 mS Resolution 0.1/1 μS, 0.01 mS Accuracy ±1% F.S Calibration Points Automatic 1 to 3 points Temperature Compensation Auto Temperature Compensation 0 to 50°C (32 to 122°F) TDS Range 0.1 ppm to 10.00 ppt TDS Factor 0.40 to 1.00 Salinity Range 0 to 10.00 ppt Temp. Range 0 to 50°C (32 to 122°F) Resolution 0.1°C Accuracy ±0.5°C LCD 2-Color Backlit LCD, 180° Viewing Angle Blue: Measurement Mode; Green: Calibration Mode; Reading Lock HOLD Stable Reading Indication Smiley Face icon Low-Battery Warning Battery icon flashing, reminder of battery replacement Self-Diagnosis Yes Heads-Up Function No Auto. Power-Off Yes, auto power-off in 8 minutes without operation Waterproof Rating IP67; Floatable Power DC3V, AAA batteries*4 Battery Life Continuous operation up to 1000 hours Dimensions& Weight Tester: (40*40*178) mm/ 133g; With case: (255*210*50) mm/ 700g Electrode's Technical Specs Application Regular water solution testing, such as pools and spas, hydroponics, tap water, drinking water, water treatment, waste water treatment, aquaculture, etc. Type of Conductivity Sensor BPB (Brush-Resistant Platinum Black) Replaceable Yes Temperature sensor Yes Range 0.1 μS to 20.00 mS Temperature Range 0 to 50°C (32 to 122°F) Download Product Manual PDF