ATS11 Online Turbidity and MLSS Sensor
The ARTang ATS11 is an industrial online optical sensor designed for continuous measurement of turbidity or sludge concentration in water and wastewater processes. It uses a combined infrared absorption and scattered-light method and transmits measurement data through an RS485 digital interface.
The ARTang ATS11 supports submerged installation in tanks, channels and suitable process assemblies.
- Turbidity range: 0.1–4000 NTU
- Sludge concentration/MLSS range: 1–50,000 mg/L
- Turbidity accuracy: ±2% of reading or ±0.5 NTU, whichever is greater
- RS485 digital communication
- Main materials: 316L and PVC body, FKM O-ring and PUR cable
Product Description
The ATS11 online turbidity and MLSS sensor is developed for wastewater-treatment and industrial water applications. The sensor combines the optical measuring element, signal processing and RS485 communication in a compact submersible assembly.
In turbidity mode, the sensor reports the optical effect of suspended particles in NTU. In sludge-concentration mode, it reports an application-calibrated solids concentration in mg/L.
The ATS11 supports one-point and multipoint calibration. The sensor can communicate with compatible PLCs, HMIs, data loggers and water-quality control systems via the RS485 interface.

Infrared optical measurement of turbidity and sludge concentration.
Technical Specifications
|
Parameter |
Specification |
|---|---|
|
Product model |
ATS11 |
|
Product type |
Online turbidity and sludge-concentration / MLSS sensor |
|
Turbidity range |
0.1–4000 NTU |
|
Sludge concentration range |
1–50,000 mg/L |
|
Turbidity accuracy |
±2% of reading or ±0.5 NTU, whichever is greater |
|
Process-medium temperature |
0–45°C |
|
Maximum process pressure |
0.4 MPa / 4 bar |
|
Maximum flow velocity |
2.5 m/s / 8.2 ft/s |
|
Power supply |
12–24 VDC |
|
Digital communication |
RS485 |
|
Standard cable length |
10 m |
|
Protection rating |
IP68 / NEMA 6P |

Source dimensional drawing: Ø60 × 106 mm. Confirm the mounting thread before holder selection.
Key Features and Engineering Benefits
- One compact sensor platform for selectable turbidity or sludge-concentration measurement
- Wide stated range for wastewater and sludge-process monitoring
- Infrared optical method combining absorption and scattered-light response
- RS485 interface with configurable address and baud rate
- One-point and multipoint calibration capability
- IP68 / NEMA 6P enclosure for applicable correctly installed submerged configurations
- 316L and PVC main construction with FKM sealing and a PUR cable
- Compact Ø60 × 106 mm body with a standard 10 m cable
- Configurable digital filtering for adapting signal stability to the process
Typical Applications
Municipal Wastewater Treatment
- Influent and process-water turbidity monitoring
- Aeration-tank MLSS trend monitoring
- Return activated sludge concentration
- Secondary-clarifier solids carryover indication
- Treated-effluent turbidity monitoring
Industrial Wastewater
- Chemical and general manufacturing wastewater
- Food and beverage wastewater treatment
- Pulp and paper wastewater
- Mining and mineral-process wastewater
- Electronics and metal-treatment wastewater
- Recycled-water and process-water solids monitoring
Water Treatment and Filtration
- Raw-water turbidity trending
- Clarification and sedimentation monitoring
- Filter inlet and outlet turbidity trends
- Backwash and filter-breakthrough indication
- Industrial water reuse and recycle systems
OEM Water-Quality and Treatment Equipment
- Packaged wastewater-treatment systems
- Sludge-process control skids
- Filtration and clarification equipment
- Industrial water-reuse equipment
Frequently Asked Questions
Simultaneous dual-mode output is not specified in the supplied technical data. Treat the ATS11 as a sensor configured for one measurement mode at a time unless ARTang confirms simultaneous operation.
It provides continuous optical process measurement and trending. Laboratory samples remain important for commissioning, calibration verification and applications that require gravimetric reporting.
The interval depends on sludge, grease, biological growth, minerals and the required measurement confidence. Establish the interval by inspecting buildup and tracking how much the reading changes after cleaning.
Request a Quote and Application Review
Need an ATS11 quotation or confirmation for a turbidity, TSS/SS or MLSS application? Send ARTang the measurement mode, expected range, liquid and sludge characteristics, temperature, pressure, flow conditions, installation method, cable length and control-system information.
ARTang will help review the sensor range, material compatibility, mounting arrangement, calibration method and RS485 integration before quotation.
Factory Strength & Quality Assurance
ARTang supports industrial measurement projects with in-house production, strict calibration, certified quality control, and global exhibition experience.
Factory Production
In-house production and assembly for stable product quality and reliable delivery.

CNC Machining Equipment

Product Assembly

CNC Machining

Welding Process

warehouse

Technical Support Department
Certified Quality
Product certificates and quality control systems support reliable industrial measurement applications.

CE

ISO

3-A

NEPSI
Exhibition Experience
ARTang meets customers and distributors at industry exhibitions to better understand project needs and market requirements.
