COD sample digestion units PA-CSB Unit configuration for simultaneous digestion of maximum 6 or 12 COD samples in acc. with ISO, DIN etc. A digestion unit consists of the following components: -TRS 300 microprocessor-controlled time and temperature control unit with COD program -CSB/E Precision heating block for RG 2 reaction vessels -E/B Insert and yoke type frame for RG 2 reaction vessels -KW/N Cooling trough with holder and stands for E/B -RG 2 Reaction vessels -LK 1 COD air coolers -LS Air cooler stands for LK COD air coolers