TS EN ISO 8655-1

TS EN ISO 8655-1 is the foundational part of the piston-operated volumetric apparatus series, bringing together common terminology, general requirements and user recommendations. It supports a shared understanding of how precision, repeatability and correct handling are related in piston pipettes, burettes, dilutors and dispensers used for volume transfer in laboratories.

Shared terminology for piston-operated volume devices

In these instruments, delivered volume is controlled through a piston-driven mechanism that moves air or liquid in a defined way. Pipettes are typically used for taking up and dispensing a set volume, burettes for controlled delivery, while dilutors and dispensers are used in preparation and repeated transfer tasks. The terminology section helps ensure that the same words mean the same thing across users, manufacturers and laboratories, which is essential when comparing performance or describing operating practice.

What this part covers in practical terms

The scope of this part is the general characteristics of piston-operated volumetric apparatus. It defines terms used in connection with these devices and gives recommendations to users, and it explicitly applies to the listed apparatus types. In general technical context, this means attention to correct selection, operating technique, pre-wetting where relevant, and consistent handling habits that influence volumetric work. The part provides a common starting point for the rest of the series and for everyday laboratory use.

• Provides common terms for piston pipettes, burettes, dilutors and dispensers.
• Focuses on the general characteristics of piston-operated volumetric apparatus.
• Includes user recommendations related to the use of these devices.
• Helps align measurement language and operating practice within the same instrument family.