Meet the S3A
Get to know the compact analyser, its automated testing routine and everyday operation.
Explore the S3ASludge settlement analysis, automated
The S3A automates routine activated-sludge settlement testing using a compact 210 ml sample. It measures MLSS, SVI, settled sludge level, supernatant clarity and floating sludge during a 30-minute unattended test.
Practical checks. Clearer results.
Explore the S3A, understand its measurements and see where it fits in your process.
View specifications
Understand the measurements
Explore MLSS, SVI, settled sludge level, supernatant clarity and floating sludge.
View measurements
Find your application
See how S3A supports routine process checks across activated-sludge treatment applications.
Explore applicationsS3A, at a glance. The detail that matters.
A compact sample, a rapid MLSS result and an automated settlement cycle. Review the figures alongside your operating requirements.
View S3A specificationsSAMPLE VOLUME
210 ml
A compact, representative mixed-liquor sample for routine process checks.
MLSS RESULT
≈10 sec
Specified range: 50–6,500 mg/L, with stated accuracy of ±10%. Above 6,500 mg/L is shown as INF.
SETTLEMENT CYCLE
30 min
An unattended cycle for settled sludge level, SVI, supernatant clarity and floating sludge.
RESULTS STORAGE
28 × 3
Store up to 28 completed results for each of three locations, with date and time.
THE COMPLETE TEST
From sample
to useful information.
Collect a representative sample, start the test and review the results. Consistent sampling and site-specific calibration help make routine checks comparable.
Prepare the sample
Collect representative mixed liquor, fill the tube with 210 ml and place it in the analyser.
Run the analysis
Start the rapid MLSS check and allow the 30-minute settlement cycle to complete unattended.
Review and record
Store completed results against one of three locations, with date and time for comparison.
One compact analyser, built around everyday wastewater checks.
Explore the measurements, result records and practical support available with S3A.
Settled sludge level
Report settled sludge level from the 30-minute automated settlement cycle.
Learn moreMixed liquor suspended solids
Check MLSS from 50–6,500 mg/L, with stated accuracy of ±10%.
Learn moreSuspended solids concentration
Use one automated test to review MLSS, SVI, SSL, supernatant clarity and floating sludge.
Learn moreOptional SSVI and SSSL
An optional stirrer extends the analysis with stirred SVI and stirred settled sludge level.
Learn moreResults storage
Store up to 28 results for each of three locations, with date and time for comparison.
Learn moreUK support and calibration
Access product support, operator guidance and calibration assistance from PMA.
Learn moreWhat operators need from settlement analysis
S3A brings MLSS and settlement analysis together in one compact, automated instrument for routine activated-sludge process checks.
Settlement measurement
Follow settled sludge level as the sample completes its 30-minute analysis. Review automatically calculated results when the cycle is complete.
Learn moreSolids measurement
Measure mixed liquor suspended solids in around 10 seconds from a 210 ml sample. The specified MLSS range is 50–6,500 mg/L.
Learn moreResults by location
Store repeatable results by location, with date and time. Compare completed results alongside site observations.
Learn moreSimple workflow, repeatable records
Bring sampling, site-specific calibration and consistent operation together for useful routine comparisons.
Site-specific calibration
Use a known site-specific MLSS sample of 2,000–4,000 mg/L. Repeat after large changes in sludge characteristics.
Learn moreConsistent workflow
S3A provides a consistent workflow for sample preparation, analysis and result storage.
Learn moreResults by location
Store up to 28 results for each of three locations, helping operators compare results over time.
Learn moreMade for routine site work
Review the S3A measurement range, optional stirrer functions and operating conditions.
Designed for repeatable process checks
Compact and self-contained, S3A is designed for safe-area wastewater treatment works and routine activated-sludge process checks.
Learn moreClear settlement results
The analyser records the measurements needed to review settlement behaviour without continuous observation.
Learn moreCompact sample workflow
A 210 ml sample and automated 30-minute cycle make routine settlement checks simpler to complete and compare.
Learn more
Understand settlement.
See your process clearly.
Bring MLSS and settlement observations into routine checks.
Explore the S3AS3A brings the core measurements of an activated-sludge settlement test together in one automated routine, helping operators compare process condition over time.
Your application.
Our experience.
We start with your application. Since 1971, PMA has helped industrial customers bring their process requirements together with practical advice, supply and support.
Whether you operate conventional activated sludge, SBR, MBR or Anammox processes, PMA can help assess whether S3A suits your sample conditions and routine monitoring needs.
Your application.
Our starting point.
Tell us about your treatment process, settlement-testing routine and expected MLSS range. We can help with product guidance, application advice and support.
PMA · ADVICE & SUPPORT
Consistent sampling.
Comparable results.
Get to know PMA
From your treatment process to repeatable settlement checks.
Get practical guidance on sample locations, routine monitoring and comparing results over time.
Explore applications
START WITH YOUR APPLICATION
Clearer process checks start with a conversation.
Tell us about your treatment process and the measurements you need. We will help you assess whether S3A is suitable.
Talk to PMA