The Thermo Scientific™ Orion™ AQUAfast™ AQ3140 COD colorimeter is a single parameter instrument for determining chemical oxygen demand in water. This colorimeter is designed to give accurate, reproducible results by offering features such as large digital backlit display, automatic switch-off, user friendly keypad, real time clock and date, calibration mode, storage function, waterproof sample chamber, and many more! The AQUAfast AQ3140 COD colorimeter is used in markets such as wastewater, food & beverage, aquaculture, and agriculture.