Infrared turbidity sensor DULCOEYE LT

light scatteringcompactRS-485

Overview
The DULCOEYE LT turbidity sensor from ProMinent provides high-precision optical measurement of low turbidity. Factory-calibrated and plug-and-play, the sensor is designed for straightforward installation and reliable operation. A long-term stable light source and optimized signal processing deliver laboratory-quality measurement results. The compact flow cell minimizes water consumption and offers fast response times, while continuous flow supports gentle hydrodynamic self-cleaning. An optional lockable calibration vessel with holder and a solid-state verification vessel are available for calibration and verification.

Benefits

• Precise laboratory-quality results: stable light source and optimized signal processing ensure high accuracy; intelligent algorithms detect and compensate air bubbles.
• Low maintenance and reliable: hydrodynamic self-cleaning and durable components reduce maintenance and increase operational reliability.
• Resource-efficient: small-volume flow cell and calibration vessel reduce water use and shorten response times.
• Flexible calibration and verification: compatible with formazine and solid-state verification vessels.
• Ready for immediate use: factory calibration and plug-and-play functionality enable quick commissioning.
• Simple and safe operation: user-friendly design and practical accessories facilitate intuitive handling.

Field of application

• Fresh water monitoring
• Well and raw water
• Surface waters (lakes, rivers)
• Drinking water treatment
• Treated wastewater (e.g. 4th purification stage)
• Distribution networks
• Industrial process water
• Pool and swimming-pool water
• Service water treatment
• Filter control and backwashing
• Fruit and vegetable washing

Technical details

• Gentle hydrodynamic self-cleaning principle
• Available individually or as a panel
• Automatic compensation of light source ageing and temperature drift
• Optional automatic flush valve for programmable remote flushing

Technical Data
Measuring range: 0…100 NTU
Measuring principle, technology: nephelometric (90° light scattering according to DIN EN ISO 7027-1)
Units: NTU, FNU, FTU
Light source: 860 nm infrared LED
Accuracy: 2 % ± 0.02 NTU whichever is greater
Repeatability: < 0.5 %
Resolution: 0.001 NTU
Response time (t90): 5 s
Supply voltage: 11...30 V DC
Calibration: 1-point or 2-point calibration (factory calibration available)
Operating temperature: 0…45 °C
Storage temperature: -10…50 °C
Ambient conditions: indoor installation (no direct sunlight), max. 90 % RH (non-condensing)
Digital output: RS-485
Housing material: 316 L stainless steel
Enclosure rating: IP 65
Weight: approx. 1,000 g + cable
Operating pressure: 1–3 bar
Flow: 20…30 l/h
Compatible controllers: diaLog C

Characteristics / Technical specifications

• Model: DULCOEYE LT
• Measuring range: 0…100 NTU
• Measuring principle: nephelometric (90° light scattering, DIN EN ISO 7027-1)
• Units: NTU, FNU, FTU
• Light source: 860 nm infrared LED
• Accuracy: 2 % ± 0.02 NTU whichever is greater
• Repeatability: < 0.5 %
• Resolution: 0.001 NTU
• Response time (t90): 5 s
• Supply voltage: 11…30 V DC
• Calibration: 1-point or 2-point (factory calibration available)
• Operating temperature: 0…45 °C
• Storage temperature: -10…50 °C
• Ambient conditions: indoor use, max. 90 % RH (non-condensing)
• Digital output: RS-485
• Housing: 316 L stainless steel
• Enclosure rating: IP 65
• Operating pressure: 1–3 bar
• Flow requirement: 20–30 l/h
• Weight: approx. 1,000 g + cable
• Compatible controller: diaLog C