The robots will automatically remove the cap from the BOD bottle, top up the bottle with seeded dilution water, take an initial DO reading and replace the cap. The process is repeated (with exception of the top up) after the incubation period to give the final DO reading allowing the BOD value to be calculated. If ATU addition is required for nitrification inhibition then this is available as an optional extra and is added to the bottle using a syringe pump for accuracy. The integrated CSV editor in the robot software will allow you to tailor the CSV file structure to ensure that it is correctly processed by your LIMS. An ultrasonic liquid level detector is used to accurately determine the top up volume of the sample bottle when adding dilution water. This removes many of the common problems seen with optical or conductive sensors such as splashes due to the sensor being non-contact and much further away from the water. Options include; dual arms for processing twice the number of bottles at the same time, ATU addition, Polyseed addition, barcode reading, sub-sampling from the original source bottle, any combination of physical chemistry tests