Turbidity Sensor
Turbidity Sensor
TL-TUR Series
90° scattered light turbidity sensor per ISO 7027. Range 0–4000 NTU, IP68, RS485 output.
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The TL-TUR Series measures water turbidity using the 90° scattered light (nephelometric) method in accordance with ISO 7027. Wide measuring range covers drinking water, surface water, and industrial effluent applications. Anti-fouling wiper option available.
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 | 90° scattered light (ISO 7027) |
| Turbidity Range | 0–100 / 0–1000 / 0–4000 NTU |
| Accuracy | ±2–3% FS |
| Resolution | 0.01 NTU (low range) |
| Temperature Range | 0–50°C |
| Signal Output | RS485 Modbus RTU / 4-20mA |
| Power Supply | 12–24 VDC |
| Protection | IP68 |
| Material | SS316L |
Key Features
- ISO 7027 compliant measurement method
- Three range options for different applications
- Optional automatic cleaning wiper
- Suitable for continuous immersion
Typical Applications
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Frequently Asked Questions
What measurement principle does this turbidity sensor use?+
The TL-TUR Series uses 90° scatter infrared optical measurement (ISO 7027 compliant), providing stable readings that are not affected by ambient light or sample colour.
What is the measurement range?+
0–4000 NTU (standard range). High-range versions up to 10,000 NTU are available for wastewater and sludge applications.
Can this sensor measure TSS (total suspended solids)?+
Yes. The TL-TUR Series can be configured for TSS measurement in mg/L, with calibration curves for specific sludge types. Contact us for TSS-specific calibration.
What is the IP rating and installation method?+
IP68 protection rating. Suitable for submersion, flow-through, and insertion installation. The anti-fouling wiper option is recommended for continuous wastewater monitoring.
Is this sensor suitable for filter effluent monitoring?+
Yes. Turbidity monitoring of filter effluent is one of the primary applications. The sensor provides early warning of filter breakthrough and supports regulatory compliance reporting.
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