Short names on the catalogue. Choose a letter, read the meaning, then open a catalogue number.
Accuracy class AS on volumetric pipettes and burettes. The tolerances are those of class A, with a short waiting time. The S comes from the German schnell. On the 40 ml volumetric pipette the waiting time is 5 s. Where AS is followed by a number, as on a shaker attachment, it is the model name.
United States Pharmacopeia. On the 40 ml volumetric pipette, USP stands next to accuracy class AS. The pipette is specified to that pharmacopeia. On some tubing, USP Class VI is a biocompatibility class in the same pharmacopeia.
