BOD Analyser, Manometric, 6 Bottles

Worth knowing before you order

The most important number for this test is not on the instrument. BOD5 is defined as a five-day incubation in the dark at 20 ± 1 °C, and there is no incubator inside this unit - the 20 ± 1 °C working temperature row is a requirement placed on the room, not a capability of the analyser. A BOD incubator or cooled cabinet able to hold 20 ± 1 °C for five days is a separate purchase and the result is not defensible without one. Second, the range is set by sample volume, not by a switch: 500 ml of sample reads 0-20 mg/L and 25 ml reads 0-4000 mg/L, so the operator has to estimate the strength of the effluent before starting or lose five days. Six bottles per run has to cover the samples, the blank and any check standard. Consumables to budget: alkali (KOH or NaOH) for the CO2 trap, glucose-glutamic acid check solution, and nitrification inhibitor - none of which is listed as supplied. If what you need is a same-day answer, a COD analyser digests in two hours and measures a different quantity.