ISO 21018-4:2016

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

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

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Referenced standards

ISO 11171:2010ISO 11500:2008ISO 11943:1999ISO 12103-1:2016ISO 16889:2008ISO 3722:1976ISO 4021:1992ISO 5598:2008
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Hydraulic fluid power — Monitoring the level of particulate contamination in the fluid — Part 4: Use of the light extinction technique

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.

Edition2016
Standard Part No4
Published Date2016
Published ByInternational Standardization Organisation
Page Count11