The B400 is the largest of Branson’s ultrasonic vapor degreasing lab units. Like the B125 and B250, Branson designed the B400 with the refrigeration system located directly below the vapor degreasing sumps to minimize the unit's overall footprint. The B400-R also features an ultrasonic sump recirculation and filtration system, which is not available on the B125 or B250. Further, this model provides additional space in the ultrasonic sump for larger parts and a large working area in the vapor zone.