Suspended Solids / MLSS Sensor
Suspended Solids / MLSS Sensor
TL-SS Series
Near-infrared optical SS/MLSS sensor. Range 0–50 g/L, IP68, RS485 output.
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The TL-SS Series measures suspended solids (SS) and mixed liquor suspended solids (MLSS) using near-infrared optical scattering. Designed for continuous immersion in activated sludge basins, return sludge lines, and effluent channels.
Working Principle
Optical sensors use light-based measurement principles that eliminate the need for consumable reagents or electrolytes. Fluorescence optical DO sensors excite a luminophore coating with blue LED light; the returned red fluorescence signal is inversely proportional to dissolved oxygen concentration. Turbidity sensors transmit near-infrared light through the sample and measure the scattered light at 90°; the scatter intensity is proportional to suspended solids concentration. These principles provide stable, drift-free measurements with minimal maintenance requirements.
Wiring & Signal Output
Technical Specifications
| Parameter | Value |
|---|---|
| Measurement Principle | Near-infrared optical |
| SS Range | 0–50 g/L |
| MLSS Range | 0–50 g/L |
| Accuracy | ±5% FS |
| Temperature Range | 0–50°C |
| Signal Output | RS485 Modbus RTU / 4-20mA |
| Power Supply | 12–24 VDC |
| Protection | IP68 |
| Material | SS316L |
Key Features
- Near-infrared optical measurement — no reagents
- Simultaneous SS and MLSS measurement
- Suitable for high-solids environments
- Continuous immersion design
Typical Applications
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