TS EN ISO 8655-1

TS EN ISO 8655-1 is the framework standard that defines the common terminology, general requirements, and user recommendations for piston-operated volumetric apparatus. It brings together the basic concepts used for piston pipettes, piston burettes, dilutors, and dispensers so that these instruments are understood consistently in laboratory practice. The standard does not apply to medical products intended for use on human beings, such as medical syringes.

The technical role of piston-operated volumetric apparatus

In piston-based systems, volume is governed by the movement of a piston within a cylinder. This principle supports the accurate handling, transfer, and dispensing of small volumes with good repeatability. In general technical terms, the main factors affecting pipetting and dosing performance include piston travel, sealing, tip fit, the physical properties of the liquid, and the user’s operating technique. The contribution of ISO 8655-1 is to establish the shared language and usage framework for this family of apparatus.

What this part covers, and what is addressed elsewhere in the series

• General requirements and user recommendations
• Piston pipettes, piston burettes, dilutors, and dispensers
• Terminology and definitions for piston-operated volumetric apparatus
• References for metrological requirements, maximum permissible errors, and marking/information for users in ISO 8655-2 to ISO 8655-5
• Guidance on conformity testing and other test methods through the relevant parts of the ISO 8655 series

From a general laboratory perspective, a standard like this helps make instruments from different manufacturers comparable in their basic interpretation and use. The user recommendations are important because they clarify not only the design family, but also the expected manner of practical use. In that sense, TS EN ISO 8655-1 provides the conceptual foundation for the broader volumetric measurement family.