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RS485 135° Backlight Total Suspended Solid TSS Sensor for Water Quality Monitoring

The Total Suspended Solids (TSS) Sensor employs a 135° backlight scattering principle compliant with the ISO7027 international standard, ensuring high reliability in diverse water environments. Designed for industrial wastewater, environmental monitoring, and process control, this sensor features strong anti-interference capabilities, minimal drift, and direct usability under sunlight. Its compact design requires only 30mL of standard liquid for calibration, while the integrated automatic cleaning brush prevents contamination and bubble formation. With a wide measurement range (0–120,000 mg/L), corrosion-resistant 316L stainless steel housing, and RS-485 MODBUS output, it delivers precise, stable TSS monitoring in harsh conditions.

    Product Paramenters

    Product Name Total Suspended Solid Sensor (TSS Sensor)
    Measurement method 135°backlight
    Range 0-50000mg/L;0-120000mg/L
    Accuracy Less than ±10% of measured value (depending on sludge homogeneity) or 10mg/L, whichever is greater
    Power 9-24VDC(Recommend12 VDC)
    Size 50mm*200mm
    Material 316L Stainless Steel
    Output RS-485, MODBUS protocol

    Product Features

    ① ISO7027-Compliant Optical Design
    Utilizing a 135° backlight scattering method, the sensor adheres to the ISO7027 standard for turbidity and TSS measurement. This ensures global compatibility and reliable data accuracy across applications.
    ② Anti-Interference & Sunlight Resistance
    Advanced fiber-optic light path design, specialized polishing techniques, and software algorithms minimize signal drift. The sensor operates accurately even under direct sunlight, ideal for outdoor or open-air installations.
    ③ Automatic Self-Cleaning Mechanism
    Equipped with a motorized brush, the sensor automatically removes fouling, bubbles, and debris from the optical surface, ensuring long-term stability and low maintenance.
    ④ Compact & Durable Construction
    The 316L stainless steel body resists corrosion in aggressive environments, while its compact size (50mm × 200mm) simplifies integration into pipelines, tanks, or portable monitoring systems.
    ⑤ Temperature & Chromaticity Compensation
    Built-in temperature compensation and immunity to chromaticity variations guarantee consistent readings in fluctuating water conditions.

    Application

    1. Industrial Wastewater Treatment
    Monitor TSS levels in real time to optimize sludge dewatering, discharge compliance, and process efficiency.
    2. Environmental Water Monitoring
    Deploy in rivers, lakes, or coastal areas to assess sediment load, erosion, or pollution events.
    3. Drinking Water Systems
    Ensure water clarity and safety by detecting suspended particles in treatment plants or distribution networks.
    4. Aquaculture & Fisheries
    Maintain optimal water quality by tracking suspended solids that affect aquatic health and equipment performance.
    5. Research & Laboratories
    Support high-precision studies on sediment transport, water clarity, or environmental impact assessments.
    6. Mining & Construction
    Monitor runoff water for regulatory compliance and mitigate environmental risks from suspended particulates.
    application

    Digital RS485 water quality sensors technical data

    Parameter Model Range Accuracy
    DO sensor LMS-DO10B 0-20mg/L, 0-60℃ ±0.1-0.3mg/L
    DO sensor LMS-DO10C 0-20mg/L, 0-60℃ ±0.3mg/L
    Trace DO sensor LMS-TDO100 0-2000ppb, 0-50℃ ±1ppb
    PH sensor LMS-PH100 0-14pH ±0.02pH
    ORP sensor LMS-ORP100 ±1000.0 mV ±0.2 mV
    EC/TDS sensor LMS-TDS102 CT: 0-9999uS/cm; 0-100mS/cm;
    TDS: 0-10000ppm
    ±2.5%FS
    Salinity/EC/TDS sensor LMS-SAL104 Conductivity: 0.1-500 mS/cm
    TDS:0-60000ppm
    Salinity: 0-500.00ppt
    ±1.5%FS
    COD sensor LMS-COD100 COD:0.1-1500mg/L
    TOC:0.1-750mg/L
    BOD:0.1-900mg/L
    Turbidity: 0.1-4000NTU
    Temperature range: 0-50 ℃
    ±5% equiv.KHP Temperature: ± 0.5 ℃
    TSS sensor LMS-TSS100 0-50000mg/L/ 0-120000mg/L ±10%FS or 10 mg/L
    Turbidity sensor LMS-TUR10L 0-100NTU ±10%FS or 0.3 NTU
    Turbidity sensor LMS-TUR10H 0-3000NTU ±10%FS or 0.3 NTU
    CO2 sensor LMS-CO2100 2000PPM/10000PPM/50000PPM ±5%FS
    Ammonia Nitrogen sensor LMS-NH4100 0-1000 mg/L ±5%FS
    Ion Selective sensor LMS-ION100 0-1000 mg/L ±5%FS
    Oil in Water sensor LMS-OIL100 0-50 mg/L ; 0-5 mg/L ±3%FS
    Chlorophyll sensor LMS-CHL100 0-500ug/L ±3%FS
    Blue-Green Algae sensor LMS-BGA100 0-2000,000 cells/ml ±3%FS
    Residual Chlorine sensor LMS-HCLO100 0 - 20.00 ppm ±5%FS
    Marine Current sensor LMS-Current100 Temperature: -3℃ - 45℃
    Velocity of flow: 0-500 cm/s
    Flow direction: 0-359.9°
    ±0.05℃ ±1 cm/s or ±2% ±2°
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