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 absorption and scattered-light principle for turbidity and MLSS measurement

    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

    Can the ATS11 measure turbidity and MLSS simultaneously?

    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.

    Can the ATS11 replace laboratory MLSS testing?

    It provides continuous optical process measurement and trending. Laboratory samples remain important for commissioning, calibration verification and applications that require gravimetric reporting.

    How often should the optical windows be cleaned?

    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.

    Worker operating production equipment for instruments and meters

    CNC Machining Equipment

    ARTang worker operating production instruments and equipment

    Product Assembly

    CNC Machining

    Welding Process

    artang warehouse

    warehouse

    Technical Support Department

    Certified Quality

    Product certificates and quality control systems support reliable industrial measurement applications.

    CE certificate for electromagnetic flowmeter

    CE

    ISO 9001 quality management system certificate

    ISO

    3-A sanitary certificate for electromagnetic flowmeter

    3-A

    NEPSI explosion protection certificate for integral magnetic flowmeter

    NEPSI

    Exhibition Experience

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

    ARTang at an industrial instrumentation exhibition, showcasing flow meters and pressure transmitters for process automation applications