Light scattering turbidity sensor DAW-TR20C-S

compacthigh-accuracyModbus RTU

Product Overview
Online monitoring solution for drinking water quality. This pressurized turbidity sensor uses 90° laser nephelometry (660 nm) to detect scattered light from suspended particles and convert it to turbidity values via calibration. Key advantages for industrial drinking-water systems include a pressure-rated, sealed flow path that reduces bubbles and eases sample recovery, a compact footprint for straightforward integration, and a self-cleaning optical window to extend maintenance intervals.

Industry Applications

• Plant outlet water
• Secondary water supply
• Distribution network endpoint water (tap water)
• Direct drinking water
• Membrane‑filtered water
• Swimming pool water
• Surface water

Product Features

• Pressure-rated flow channel to reduce bubble formation
• Sealed flow path to facilitate sample recovery
• Compact size for easy system integration
• Self-cleaning optical window to extend maintenance intervals
• Ultra-low detection limit: 0.005 NTU
• High accuracy in low-range measurements (±2% or 0.02 NTU, whichever is greater; Formazin, 25 °C)
• Multiple selectable ranges: 0–1 / 20 (default) / 100 NTU; extended monitoring up to 2000 NTU
• Outputs: RS485 Modbus-RTU; optional 4–20 mA
• Ingress protection: IP68
• Operating temperature: -5 to 45 °C
• Sample flow: 100–1000 mL/min (recommended 500 mL/min)

Technical Specifications
Operating Voltage: DC 24 V (supports 9–28 V wide input)
Power: 5 W (peak)
Measurement Method: 90-degree laser nephelometry
Light Source: 660 nm laser
Range: 0–1 / 20 (default) / 100 NTU (multiple ranges; extended monitoring up to 2000 NTU)
Resolution: 0.0001 NTU (<1 NTU), 0.001 NTU (≥1 NTU)
Limit of Detection: 0.005 NTU
Accuracy: ±2% or 0.02 NTU (whichever greater) based on Formazin at 25 °C
Operating Temperature: -5 to 45 °C
Operating Mode: Pressurized flow-through
Operating Pressure: ≤ 0.6 MPa
Sample Flow: 100–1000 mL/min (recommended: 500 mL/min)
Dimensions (W × H × D): 192 × 147 × 98 mm (including fittings and backplate)
Enclosure Material: ABS
Outputs: RS485 Modbus-RTU, optional 4–20 mA
Note: Manufacturer reserves the right to modify specifications for product improvements.