The K-376 accommodates up to 24 sample tubes (300 mL) whilst the K-377 has a maximum capacity of 48 tubes. Continuous rack loading, without interrupting the run, is only possible with the K-377.
Yes, due to the unique steam over pressure technique the sample tubes do not come into contact with sodium hydroxide, they are continuously purged with steam during the distillation process to increase their lifetime and to reduce manual cleaning to a minimum.
Yes, the micro and 300 mL sample tubes fit the 20 position rack used with all BUCHI block digesters. This rack can be processed in both sampler models (K-376/K-377). For the 500 mL tubes a specific 12 position rack must be used.