Designed for durability and robustness, a BD50s/BD28s digestion system includes a block digestion unit, programmable controller, tube rack/draftshield, digestion tubes and an optional cooling stand that supports the tube rack above the block. Ideal for applications such as Total Kjeldahl Nitrogen (TKN) and Phosphorous (TKP), the unique heating element provides even heating throughout the solid aluminum block ensuring reproducible digestions. If you are looking to automate your digestions, the BD50s and BD28s offers enhanced productivity, better quality digestions and increased safety.