Sample tube racks having retention bars

摘要: Sample tube racks (100) having retention bars (102) to retain sample tubes (120) in the during processing of contents are described. An example rack for holding includes a carrier (104) an elongated body and walls (116) defining apertures (118). Each (118) is configured receive respective one (120). The define openings (124), each which corresponds extends along at least portion length (120), (124) enable viewing information on outer surfaces also bar be pivotally coupled end (104). has (126), positioned over (118), (126) dimensioned prevent removal from through (102).