series is a basic type of super dry cabinet. It is very useful for dry storage. It has a patented drying technology. It is available in three model types: SDB 151-21, SDB 1104-21, and SDB 1106-21. The models have different cabinet sizes. Depending on the cabinet size the numbers of shelves available changes. The shelves are painted with ESD material. These cabinets do not have door contact alarm. They do not have humidity alarm which indicates change in humidity levels. A digital panel displays the humidity levels and temperature.