TurbiTechw² LS Sensors

Self Cleaning Sensor for Suspended Solids and Turbidity Monitoring

The TurbiTechw² LS Sensor is designed to monitor the levels of Suspended Solids or Turbidity typically found in Final Effluent from municipal and industrial wastewater treatment plants. It is also capable of monitoring solids in the intake to both effluent and drinking water treatment processes. The normal operating range is between 0 - 50 and 0 - 500 FTU, a version of the sensor is available that extends the range to 0-1,000 FTU.

Monitoring of these key parameters requires sensors that are reliable and accurate, the TurbiTechw² LS fills this requirement perfectly. The large optical surfaces and sample volume ensure that the information provided by the sensor is both representative of the process and tolerant of fouling. In addition the sensor incorporates a self cleaning mechanism that ensures that the optical surfaces are kept clean at all times, the cleaning system is designed to avoid problems with ragging and does not smear the optical system. The cleaning system ensures that manual intervention on a routine basis is not required, the sensor should simply be checked as part of general site housekeeping.

The TurbiTechw² LS Sensor employs infrared light at 860 nm using the 90º Light Scatter principle in accordance with ISO7027 (2000). The cleaning process is automatically initiated by the 7300w² Monitor at a user determined frequency. The cleaning process takes only 90 seconds, which means that the sensor is available for 99.5% of the time with a 5 hourly cleaning cycle.

Applications

  • Final Effluent Turbidity
  • Dosing Control
  • Intake Protection

Features

  • Automatic Self Cleaning
  • ISO 7027 Compliant
  • Large Sample Volume

Technical Specification

Physical

Dimensions80 mm diameter, 470 mm long
Weight2.2 kg
Protection ClassIP68
Material of ConstructionBlack Acetal Co-Polymer, 316 Stainless Steel, Glass
Seal MaterialPolyurethane, Nitrile (Optional Viton)
Cable EntriesIntegral Cable Gland
Cable Type4 core, 2 Twisted Pair, 5mm O/D Polyurethane Coated
Cable Length10 metres standard, 100 metres maximum
Service RequirementSeal Service every 3500 cleans (application dependent)

Environmental Data

Operating Temperature 0 - 50ºC
Storage Temperature -20 to 60ºC
Location Indoor or Outdoor
Pressure Rating10 mWC

Interface to Monitor

Sensor OutputModTechw², RS485
Power12 VDC from Monitor

Measurement Principal

Principal of Operation90º Light Scatter
ISO 7027 Compliant
Wavelength860 nm Infrared

Measurement Characteristics

AccuracyBetter than +/- 5% Reading on real sample
ResolutionDependent on range setting, typcially +/- 2%
RepeatabilityBetter than +/- 1% Reading on real sample
Response Time0.5 seconds - damping provided by monitor
FlowrateNot affected by flowrate, avoid deadspots and extreme turbulence
Maximum Range0-500 FTU, extended range 0-1,000 FTU available
Minimum Range0-50 FTU
Measuring range will depend on the nature of the sample being monitored
Information to Download
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