Automatic electric potential tracking and correcting software . Automatically detect and filter tiny bubbles. Real-time diagnostic of system working status. Waste liquid automatic detection and alarming. Automatic calibration and two-point correction. Wave theory flushing method and direct flushing pipe method. High accurate and long life electrode and TCO2 sensor. Sleep mode to reduce reagent consumption. Rapid test speed of 80 tests per hour. Option: Sample tray.