- Aeration-basin MLSS checks
- Activated-sludge process control
- Sequencing batch reactor monitoring
- Suspended-solids trend investigation
- Process comparison between tanks
- Field checks before laboratory confirmation
Portable MLSS and TSS Testing
Compare portable instruments for immediate suspended-solids checks, activated-sludge control and repeatable treatment-process assessment.
What does MLSS and TSS show?
Mixed liquor suspended solids describe the suspended biomass and solids in an activated-sludge process, while total suspended solids apply more broadly to particles retained from a water or wastewater sample. Portable instruments help operators obtain immediate process information at the tank side.
Read the US EPA municipal wastewater resources for authoritative background. Return to our portable water-quality parameters guide to compare other measurements, or visit PMA for wider water and wastewater instrumentation support.
Where portable MLSS and TSS testing is useful
Portable instruments for MLSS and TSS
The correct instrument depends on the measurement method, expected range, water matrix, other parameters and how results need to be recorded.
Royce Aqua 22
Measures MLSS or TSS by infrared absorption and also provides sludge blanket depth with a 10 m submersible sensor cable. See the Royce portable sludge measurement site.
Best for: direct tank-side MLSS/TSS and interface-depth checks.
View Aqua 22
S3A suspended solids analyser
Automates a small-sample settlement test and reports MLSS with SVI, settled sludge level, supernatant clarity and floating sludge. See the S3A product site.
Best for: operators who need MLSS in the context of sludge settleability.
View S3A
Not sure which MLSS and TSS option fits?
Tell us what water you are testing, the expected range, where the measurement will be made and which other parameters matter.
Portable MLSS and TSS testing FAQs
What does portable MLSS and TSS testing show?
Mixed liquor suspended solids describe the suspended biomass and solids in an activated-sludge process, while total suspended solids apply more broadly to particles retained from a water or wastewater sample. Portable instruments help operators obtain immediate process information at the tank side.
Where is portable MLSS and TSS testing useful?
Common uses include aeration-basin mlss checks, activated-sludge process control, sequencing batch reactor monitoring, suspended-solids trend investigation. The best sampling point should always be chosen around the decision the result needs to support.
Which portable instrument can measure MLSS and TSS?
Royce Aqua 22 and S3A suspended solids analyser provide different levels of capability. The preferred option depends on the method, range, sample and other parameters.
Can a portable result help verify an online analyser?
Yes. A carefully collected portable result can provide an independent spot check during commissioning or investigation. Sampling location, timing, preparation and method differences must be considered before comparing readings.
What information should I provide before requesting a quote?
Share the water type, expected range, sampling location, testing frequency, other required parameters, record-keeping needs and any site constraints. This helps PMA confirm the complete practical package.
Can PMA help select the correct method and equipment?
Yes. PMA can review the application, expected conditions, measurement method, reagents or sensors, calibration needs and supporting accessories before quotation.
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