The Online SDI15 Sludge Density Index Analyzer is designed for monitoring and analyzing water quality in RO systems, providing accurate SDI measurements to optimize reverse osmosis performance and prevent membrane fouling.

Applications

Water treatment plants
Wastewater treatment plants
Steel and metallurgy industries
Petroleum and chemical plants
Power generation facilities
Papermaking industry
Textile and dyeing operations
Brewing industry
Fine chemical manufacturing
Coal mining operations
Food and beverage processing
Electronics and circuitry manufacturing
Electroplating and surface engineering
Energy sector applications
Seawater desalination plants
Marine vessels
Boiler systems
Various other industrial applications

Operating Principle

The analyzer supports both online installation and portable operation, with online fixed installation recommended for standard automatic SDI analyzer configurations.

Installation requires positioning the sampling port on the pipeline before the reverse osmosis system. A tee joint connection with flow control valve is standard practice. A pipeline filter is recommended to prevent debris entry, and for extended sampling lines, a bypass with overflow valve ensures continuous water flow to prevent sediment accumulation.

The integrated design combines bypass, venting, and drainage functions into a single drainage system using 10mm transparent plastic tubing routed to drainage trenches.

Technical Specifications

Specification	Detail
Measurement Range	0.2～6.67 (SDI 15min)
Accuracy	±0.2 (SDI 15min)
Pre-membrane Pressure	0.207 MPa
Display Panel	LCD display with 4 operational and control touch keys
Sample Container	150 mL
Microporous Filter	φ25 mm
Membrane Specifications	φ25 mm, pore size 0.45 μm ±0.02 μm
Protection Rating	IP66, NEMA 4X

Tags:

Online Water Quality Monitor

Multi Parameter Water Quality Monitor

PH ORP Meter

Conductivity Meter

Dissolved Oxygen Meter

Ion-selective Meter

Residual Chlorine Meter

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

Ultrasonic Meter

Water Quality Monitoring Accessories

Online Water Quality Monitor

Drinking Water Monitoring

Industrial Wastewater Monitoring

Aquaculture water Quality Monitoring

Boiler Water Monitoring

Multi Parameter Water Quality Monitor

PH ORP Meter

PH ORP Transmitter And Sensor

Portable PH ORP Meter

Desktop PH ORP Meter

Conductivity Meter

Conductivity Transmitter And Sensor

Portable Conductivity Meter

Desktop Conductivity Meter

Dissolved Oxygen Meter

Dissolved Oxygen Transmitter And Sensor

Portable Dissolved Oxygen Meter

Desktop Dissolved Oxygen Meter

Ion-selective Meter

Fluoride Analyzer

Chloride Analyzer

Calcium Analyzer

Ammonia Nitrogen Analyzer

Nitrate Nitrogen Analyzer

Residual Chlorine Meter

Disinfectant Water Monitoring

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

Ultrasonic Meter

Liquid Level Meter

Sludge Interface Meter

Water Quality Monitoring Accessories

products details

Online SDI15 Sludge Density Index Analyzer with LCD Display and IP66 Protection for RO Systems

Online Water Quality Monitor

Multi Parameter Water Quality Monitor

PH ORP Meter

Conductivity Meter

Dissolved Oxygen Meter

Ion-selective Meter

Residual Chlorine Meter

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

Ultrasonic Meter

Water Quality Monitoring Accessories

Online Water Quality Monitor

Drinking Water Monitoring

Industrial Wastewater Monitoring

Aquaculture water Quality Monitoring

Boiler Water Monitoring

Multi Parameter Water Quality Monitor

PH ORP Meter

PH ORP Transmitter And Sensor

Portable PH ORP Meter

Desktop PH ORP Meter

Conductivity Meter

Conductivity Transmitter And Sensor

Portable Conductivity Meter

Desktop Conductivity Meter

Dissolved Oxygen Meter

Dissolved Oxygen Transmitter And Sensor

Portable Dissolved Oxygen Meter

Desktop Dissolved Oxygen Meter