Process point
Identify raw water, sedimentation, filter outlet, finished water, wastewater or an industrial process point.
NTU · Online optical measurement
Select an online turbidity analyzer by range, process point and installation
PTU-800, PTU-600, PTU-500, PLTU-700 and PLTU-600 are structured from the supplied model sheets. The first three are immersion sensors; the last two are low-range flow-through configurations and are not interchangeable by range alone.
5model-specific detail pages
0.001 NTUlowest documented start
4000 NTUhighest documented range
4real water-supply cases
01 · Start with the application
Choose immersion or low-range flow-through first
Raw water, sedimentation, wastewater and process water normally start with PTU. Filter outlet, finished water, direct drinking water and desalination product water normally start with PLTU.
Normal and peak range
Provide normal, alarm, upset and cleaning-period NTU—not a single design value.
Pressure or sample flow
Immersion selection needs pressure, velocity and mounting; flow-through selection needs stable sample flow, drain and cleaning access.
Fouling and interface
Confirm particles, color, bubbles, automatic cleaning, materials, cable, 4–20 mA, relays and RS485.
02 · Model architecture
Three PTU models and two PLTU models
Each page retains its own accuracy, pressure or sample flow, dimensions, material, protection and interface evidence.
Immersion online analyzerPTU-800Wide-Range Online Turbidity Analyzer
The widest documented range in this five-model group, with dual-beam infrared scattering, a larger Ø60 mm sensor and optional standard or seawater construction.
0.01–100 / 0.01–4000 NTU±2% or ±0.1 NTU≤0.4 MPa
Immersion online analyzerPTU-600Online Turbidity Analyzer
A mid-size Ø49 × 230.5 mm SUS316L sensor covering 0.01–3000 NTU for raw water, sedimentation, wastewater and industrial process monitoring.
0.01–3000 NTU±5% or ±0.5 NTU≤0.4 MPa
Immersion online analyzerPTU-500Compact Online Turbidity Analyzer
The smallest immersion sensor in the group, suited to lower-pressure raw-water, surface-water, environmental and wastewater monitoring points.
0.01–1000 NTU±5% or ±0.3 NTU≤0.1 MPa
Low-range flow-through analyzerPLTU-700Low-Range Flow-Through Turbidity Analyzer
A separate-flow-cell configuration for low-range filter outlet, finished water, direct drinking water and desalination monitoring.
0.001–100 NTU300–700 mL/minEPA 90°
Compact low-range analyzerPLTU-600Compact Low-Range Turbidity Analyzer
An all-in-one low-range analyzer with a 3.5-inch LCD, 200–400 mL/min sample flow and simplified quick-connect inlet, outlet and cleaning ports.
0.001–100 NTU200–400 mL/min3.5-inch LCD
03 · Applications
Four real water-supply turbidity projects
All case copy is searchable English on the English site. Public images remove the original Chinese information panels and third-party branding.
View full cases↗
2016 · Ningde, Fujian, China · Pingnan water plantMultiparameter outlet-water monitoring
In August 2016, online instruments were installed to monitor pH, turbidity and residual chlorine continuously and provide stable operating data for the water-production team.
Monitored parametersTurbiditypHResidual chlorineFlow
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2022 · Sanming, Fujian, China · Yong'an rural water plantRural drinking-water online data collection
In February 2022, a distribution-water monitoring system was deployed to collect pH, turbidity, residual chlorine and chlorine-dioxide data and transmit the records to the dispatch center.
Monitored parametersTurbiditypHResidual chlorineChlorine dioxide
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2016 · Hebei, China · Boye rural water supplyRural water-supply online quality monitoring
In July 2016, online water-quality instruments were installed to track outlet turbidity, residual chlorine and pH continuously.
Monitored parametersTurbiditypHResidual chlorine
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2019 · China · Fumin water plantContinuous monitoring at key water-plant points
In March 2019, online instruments were deployed for continuous turbidity, residual-chlorine and pH measurement so source-water or treatment-process problems could be identified quickly.
Monitored parametersTurbiditypHResidual chlorine
↗04 · Common questions
Confirm this information before an inquiry
Why does PTU-800 show two ranges?+
The supplied sheet lists 0.01–100 NTU and 0.01–4000 NTU configurations. The formal selection must use normal and peak range.
Which family fits low-range treated water?+
Filter outlet, finished water and direct drinking water normally start with the 0.001–100 NTU PLTU-700 or PLTU-600.
Do all five models have the same outputs?+
PTU and PLTU-700 sheets list three 4–20 mA outputs and three relays. The integrated PLTU-600 lists one 4–20 mA output and one relay.
Can the images replace technical drawings?+
No. The clean images are for public presentation. Dimensions, interfaces and accessories come from the verified datasheet and project confirmation.
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We will respond with a recommended configuration, supporting documentation and quotation.