TS EN ISO 8655-1

TS EN ISO 8655-1 is the foundational document in the piston-operated volumetric apparatus series, covering terminology, general requirements and user recommendations. It establishes the common technical language for piston pipettes, piston burettes, dilutors and dispensers used to handle liquids by measured volume in laboratories, helping users and manufacturers distinguish the different device types and understand the general expectations attached to their use.

How piston-operated volumetric apparatus work

These instruments operate on a piston-displacement principle: a piston moves to draw in and expel a defined liquid volume. In day-to-day laboratory work, they are used for transferring small volumes, preparing dilutions and supporting routine analytical procedures such as titration. The standard’s terminology function is important because words such as piston, tip, volume setting and dispensing need to be understood consistently across instructions, product literature and training materials.

What this part covers and what it does not

• General requirements for piston-operated volumetric apparatus.
• Applicability to piston pipettes, piston burettes, dilutors and dispensers.
• Definitions of terms used with piston-operated volumetric apparatus and user recommendations.
• Exclusion of medical products intended for use on human beings, such as medical syringes.
• Reference to other parts of ISO 8655 for metrological requirements, maximum permissible errors, marking and user information.

In general technical terms, a vocabulary-and-framework standard like this one does not mainly describe performance limits; instead, it sets the conceptual baseline for the equipment family. TS EN ISO 8655-1 therefore serves as the entry point to the ISO 8655 series, while the measurement-related requirements, conformity testing and alternative methods are addressed in the other parts named in the scope.