ISO 1:2022 — Standard reference temperature (20 °C) for geometrical and dimensional specifications

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ISO 1 is the International Standard defining the standard reference temperature for geometrical and dimensional specification. To match this to your program, talk with our team.

What ISO 1 Covers

It sets 20 degrees Celsius as the reference temperature for specifying and verifying size, form, orientation, location, and surface texture.

How the Test Is Run

Dimensional measurements are referenced to, or corrected to, the standard reference temperature so results are comparable across laboratories.

Why It Matters

A common reference temperature underpins consistent dimensional metrology; temperature-controlled conditions support accurate measurement.

Reading the Designation

Cited as ISO 1 with its edition year. Confirm the edition and specimen or fixture requirements before finalizing setup. To configure a testing setup, request a quote.

Related Standards

ISO 16808 and EN ISO 15630-1 are ISO test-method standards used with measured specimens.

Request a Quote

Aligning your measurement setup with ISO 1? Request a quote and our team will help you build a system matched to your measurement type and conditions.


TensileMill CNC products for ISO-1

Our specimen-preparation systems and testing equipment compatible with ISO-1:


Configure your ISO-1 setup with TensileMill CNC

TensileMill CNC helps labs run ISO-1 with repeatable, audit-ready results. Our range includes universal testing machines, specimen-preparation systems, grips, and fixtures. Request a quote and our team will help you configure a system for ISO-1.