The parameter at a glance.
SSSL records the settled sludge level during the optional stirred test. It is not available from the standard unstirred S3A workflow.
Stirred settlement result
Unit or result
30 minutes
Test timing
Optional stirrer required
S3A scope
Understanding Stirred Settled Sludge Level (SSSL).
SSSL records the settled sludge level during the optional stirred test. It is not available from the standard unstirred S3A workflow.
Optional module
The optional stirrer is required for SSSL. Confirm the site’s test method before specifying the instrument configuration.
A stirred result
SSSL should be compared with results produced using the same stirred method and a consistent representative sample.
Review with SSVI
Use SSSL with the associated SSVI and process context to understand the completed stirred settlement test.
One sample. A complete settlement picture.
The S3A measures MLSS rapidly, then continues the unattended 30-minute settlement test for SVI, SSL, supernatant clarity and floating sludge. The optional stirrer is required for SSVI and SSSL.
01 / MLSS
Rapid MLSS measurement
A result in approximately 10 seconds from a compact 210 ml sample, within the specified 50 to 6,500 mg/L range.
02 / Settlement test
Unattended settlement analysis
The analyser continues the 30-minute cycle and stores the completed result after the test has finished.
Designed for routine activated-sludge checks.
The S3A uses a compact 210 ml representative sample in a safe-area wastewater-treatment environment. The 30-minute settlement cycle runs unattended, allowing the operator to continue with other work.
Completed results can be stored for each of three locations, with date and time information.
Explore related S3A parameters.
See how the S3A measurements work together within one repeatable settlement-analysis workflow.
SSL
Record the volume occupied by activated sludge after the 30-minute settlement cycle.
SSVI
Measure Stirred Sludge Volume Index when the optional stirrer module is fitted.
MLSS
Measure mixed liquor suspended solids from a compact 210 ml sample in approximately 10 seconds.