Measurement target
Identify suspended solids, mixed-liquor suspended solids or concentrated sludge.
Browse by parameter
Online suspended-solids and sludge analyzer selection center
Compare verified PSS-800 wide-range and PSS-600 compact optical analyzers for suspended solids, mixed liquor and sludge concentration.
SS / MLSSSuspended solids and sludge concentration
01
Select for solids range and the real process point
Optical solids measurement depends on the target, concentration range, particle distribution, sludge homogeneity, bubbles, velocity, mounting and cleaning—not only a maximum mg/L value.
02
Confirm these conditions before selection
Minimum to peak range
Provide minimum, normal, peak and alarm mg/L values.
Process and homogeneity
Confirm process point, particle distribution, bubbles, settling and sludge homogeneity.
Mounting and interfaces
Provide pressure, velocity, material, cleaning, cable, 4–20 mA, relays and RS485 requirements.
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Typical applications
Aeration tanksReturn and excess sludgeSecondary clarifiersMunicipal wastewaterIndustrial wastewaterPlant outlets and drainage networks
04
Two verified FUNEL models
PSS-800
Wide-range suspended-solids / sludge analyzer
Combined infrared absorption and dual-beam scattered-light analyzer for concentrations up to 120000 mg/L.
Verified facts- 0.01–120000 mg/L
- ±5% of reading
- ≤2.5 m/s
PSS-600
Suspended-solids / sludge analyzer
Slim SUS316L infrared scattered-light sensor for continuous concentrations up to 50000 mg/L.
Verified facts- 0.01–1000 / 100–50000 mg/L
- ±10% or ±10 mg/L
- Ø49 × 230.5 mm
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Suspended-solids and sludge selection questions
How should I choose between PSS-800 and PSS-600?+
Use the target, minimum-to-peak range, homogeneity, process point and mounting. PSS-800 covers wider and higher documented ranges; PSS-600 uses a slimmer sensor.
Why is sludge homogeneity important?+
Optical readings are affected by particle distribution, bubbles and sludge homogeneity, so the real process condition must be confirmed with the range.
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