BOD ? OXIDIRECT MEASUREMENT SYSTEMThis new BOD OxiDirect sensor system permits exact and convenient measurement of the Biochemical Oxygen Demand ( BOD ) based on the respirometric principle. All results are shown in a big display directly in mg/L BOD without the need for time-consuming conversion using factors! In addition the measuring period can be user-selected between 1 and 28 days. The unit measures BOD levels via the pressure drop in the closed system during a defined period of time. Following measurement, the results are stored and can be called up to the display at any time.