# ISO 11171:2020 — Withdrawn and superseded ISO standards

For ISO 11171:2020, item title is Hydraulic fluid power — Calibration of automatic particle counters for liquids; status code is 9599; successor is ISO 11171:2022; withdrawn / published date is 2020-11-19, recorded from its source on 2026-08-05.

- **Identifier:** ISO 11171:2020 _(verified: appears in the quote below)_
- **Item title:** Hydraulic fluid power — Calibration of automatic particle counters for liquids _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 11171:2022
- **Withdrawn / published date:** 2020-11-19 _(verified: appears in the quote below)_

## What the source says

> 72619,IS,,ISO 11171:2020,Hydraulic fluid power — Calibration of automatic particle counters for liquids,Transmissions hydrauliques — Étalonnage des compteurs automatiques de particules en suspension dans les liquides,2020-11-19,4,['23.100.60'],ISO/TC 131/SC 6,9599,[70291],[82850],"['en','fr']",52,"<p>This document specifies procedures for the following:</p><p>a) primary particle-sizing calibration for particle sizes 1 µm(c) and larger, sensor resolution and counting performance of liquid automatic particle counters that are capable of analysing bottle samples;</p><p>b) secondary particle-sizing calibration using suspensions verified with a primary calibrated APC;</p><p>c) establishing

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).