In-line turbidity meter DLTU-700

monitoringfor drinking water

Product Overview
This low-range turbidity sensor directs parallel light from its light source into the internal water sample, where the light is scattered by suspended particles. A silicon photocell receiver—immersed in the sample—captures the scattered light at a 90° angle to the incident beam, and turbidity values are calculated based on the correlation between this 90° scattered light and the incident light intensity. Widely applied for online turbidity monitoring, it is suitable for waterworks (filtration pre- and post-monitoring, product water), direct drinking water systems, as well as industrial scenarios including circulating cooling water, filtered effluent, and reclaimed water reuse systems.

Measurement Principle
This low-range turbidity sensor guides parallel light from its light source downward into the water sample. Suspended solids in the water scatter the light, and a silicon photocell receiver (immersed in the sample) captures the scattered light at a 90° angle to the incident beam. Turbidity values are calculated based on the correlation between the 90° scattered light and the incident light intensity.

Key Features

• Stable measurement data with excellent repeatability.
• Simple cleaning and low maintenance requirements.
• Continuous-reading scattering turbidity meter, specialized for low-range turbidity monitoring.
• Plug-and-play design for quick, easy on-site installation.

Applications

• Online turbidity monitoring for waterworks (filtration processes, product water) and direct drinking water systems.
• Online turbidity monitoring for recirculating cooling water, filter water in industrial production, and water reuse systems.

Product Specifications
SpecificationsDetailsMeasurement Range0.001-100NTUMeasurement AccuracyThe deviation of reading in 0.001~40NTU is ±2% or ±0.015NTU (whichever is maximum); it is ±5% in the range of 40-100NTU.Repeatability±2%Resolution Ratio0.001~0.1NTU, depends on different rangesFlow Rate300mL/min≤X≤700mL/minPipe FittingInjection Port: 1/4NPT; Discharge Outlet: 1/2NPTMaterialMachine: ABS+SUS316L; Sealing Element: Acrylonitrile Butadiene Rubber; Cable: PURPower supply13VDCCommunication protocolMODBUS RS485Storage Temperature-15~60℃Operating Temperature0~45℃ (not freeze)Weight2.1KGLevel of ProtectionIP65 (Indoor)Cable LengthStandard: 3 m, the tungsten lamp version maximum can be extended 7 m
Technical Characteristics / Specifications

• Measurement Range: 0.001-100NTU
• Accuracy: ±2% or ±0.015NTU (0.001~40NTU), ±5% (40-100NTU)
• Repeatability: ±2%
• Resolution: 0.001~0.1NTU
• Flow Rate: 300-700mL/min
• Pipe Fitting: 1/4NPT (injection), 1/2NPT (discharge)
• Material: ABS+SUS316L, Acrylonitrile Butadiene Rubber, PUR cable
• Power Supply: 13VDC
• Communication: MODBUS RS485
• Storage Temp: -15~60℃
• Operating Temp: 0~45℃ (not freeze)
• Weight: 2.1KG
• Protection: IP65 (Indoor)
• Cable Length: 3m standard, up to 7m (tungsten lamp version)