TDS Range: 0 to 2000 ppm (mg/L); TDS Resolution: 1 ppm (mg/L); TDS Accuracy: ±2% F.S; TDS Calibration: Automatic, one point at 1382 ppm; EC/TDS Temperature Compensation: Automatic from 0 to 50°C/(32 to 122°F); Temperature Correction Coefficient: 1.9%/°C; EC to TDS Conversion Factor: 0.5. Temperature Range: 0.0 to 50.0°C/(32.0 to 122.0°F); Temperature Resolution: 0.1°C/(0.1°F); Temperature Accuracy: ±0.5°C/(±1°F). Large Multi-level LCD: The LCD is 29 mm (1.125”) x 20 mm (0.81”) allowing the user to easily read both the pH and temperature simultaneously; Graphite Sensor: Reduces polarization effects and does not oxidize resulting in a reliable and accurate reading. Operating Temperature: 0 to 50°C/(32 to 122°F), Relative Humidity: 100%; Automatic Shut-Off: 8 minutes, 60 minutes, or disabled. Low Battery Indicator: Low battery indicator that is displayed when less than 10% battery life is remaining; Battery % Level at Startup: At start-up, all the LCD segments are displayed for 1 second, then the percent indication of the remaining battery life is displayed.