The controller bridge rests firmly on the deep extruded stainless steel tank, but can be easily removed to clean the tank. A wide opening of the bathroom provides easy access to samples and bathroom including cover improves stability.rrFeatures:r- Working temperatures from ambient +10° up to 150°Cr- Advanced Programmable, Advanced Digital or MX Temperature Controllerr- 6, 10, 20 or 28 liter reservoirr- DuraTop™ Chemical Resistant Bridge, Swivel 180™ Rotating Controller (on Advanced Programmable and Advanced Digital models)r- Lidded opening for optional cooling coil (10, 20 and 28 liter models)r- External circulation capabilityr- Complies with DIN 12876-1 Class I safety requirements for use with non-flammable liquidsr- Includes bath cover