Which pipette type is used for performance monitoring and should be Class A?

• A. Serological, Class 1
• B. Mohr, NSF Approved
• C. Volumetric, Class A
• D. Buchner, Class 1

Answer: (C)

For performance monitoring, you need a tool that can deliver a single, highly precise volume with certified accuracy. A volumetric pipette is built exactly for that purpose: it is designed to deliver one exact volume, using a calibrated mark and a careful blow-out to ensure the full volume is transferred. When it’s Class A, the tolerances are the tightest allowed by standards, providing the reliability and traceability required for quality control, calibration checks, and inter-lab comparability. The other options aren’t suited for this role: serological pipettes are graduated and versatile but typically don’t meet the stringent accuracy needed for performance monitoring; Mohr pipettes are also graduated and used for less-precise transfers; a Büchner setup is a filtration device, not a precise measuring pipette. So the combination of a volumetric design with Class A certification best fits the need for performance monitoring.