ISO 21018-4:2016Withdrawn

Hydraulic fluid power — Monitoring the level of particulate contamination in the fluid — Part 4: Use of the light extinction technique

Transmissions hydrauliques — Surveillance du niveau de pollution particulaire des fluides — Partie 4: Technique d'absorption de lumière

This edition has been replaced by ISO 21018-4:2019.

Abstract / scope

ISO 21018-4:2016 specifies a method for the determination of the particulate contamination level using the light extinction technique (also known as light blockage or light obscuration) either online or off-line in containers. It also defines procedures for calibrating the instruments and verifying their correct operation both in the laboratory and in service.

In general, the techniques described in ISO 21018-4:2016 are suitable for monitoring

- the general cleanliness level in hydraulic systems,

- the progress in flushing operations, and

- support equipment and test rigs.

The use of this method is applicable to single-phase liquid systems only.

Life cycle

Replaced by

ISO 21018-4:2019PublishedHydraulic fluid power — Monitoring the level of particulate contamination in the fluid — Part 4: Use of the light extinction techniqueInternational Standard · Published 16 Aug 2019 · ISO/TC 131/SC 6