The OxiDirect system consists of 6 bottles closed in which the pressure drop, a result of oxygen consumption is measured as the genesis of CO2 counteracts with the present in the insulating seal bottle stopper potassium hydroxide. The method does not require use of mercury. The value is directly expressed in mg of oxygen.r- Large display with graphical representation of measured valuesr- It has Bluetooth, USB and SD card slot.r- Individualized for each of the six samples Programming.r- Selection of the measurement period between 1 and 28 days (BOD 5, BOD7, OECD ...)r- Automatic storage of results for all measured values.r- Measuring range from 0-40 mg / l to 0-4000 mg / l BOD, depending on sample volume.r- Automatic start once the samples temperedr- Respect the environment to be free of mercury.r- Inductive stirring system with automatic centering of stirring magnets.r- Operable by remote controlrrIt comes with 6 sensor heads and control unit, battery unit inductive stirring power, 6 sample bottles, 6 supports, 6 magnets agitation, flasks overflow 157ml and 428ml, 1 bottle of 50 ml of potassium hydroxide solution 1 50ml bottle nitrification inhibitor solution 1 remote control and a USB cable.