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TurbiTechw² LA Suspended Solids Sensor

Self Cleaning Suspended Solids Sensor

The TurbiTechw² LA Sensor has been designed for use in aeration systems monitoring suspended solids also known as mixed liquor suspended solids or activated sludge where solids are typically in the range of 1,500 to 3,500 mg/l. The sensor can also measure Returned Activated Sludge (RAS), Surplus Activated Sludge (SAS) and suspended solids or turbidity.

The large optical surface and sample volume combine to ensure that the sensor is providing information that is reliable and representative of the solids present in the process. Deposits of fats and grease on the sensing area do not prevent the sensor from measuring unlike sensors with small optical surfaces. In addition, the sensor incorporates a self cleaning mechanism that ensures 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.

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  • General Specification
  • Measurement Specification
  • Ordering Information & Spare Parts
Dimensions (hxwxd)470 x Ø80 mm
Weight2.2 kg (inc 10 metres of cable)
Protection ClassIP68
Enclosure MaterialBlack Acetal Co-polymer
Cable EntriesIntegral Cable Gland
Wetted PartsBlack Acetal, 316 Stainless Steel, Glass, Polyurethane, Nitrile
Cable Type4 core, 2 Twisted Pair, 9 mm O/D Polyurethane Coated
Cable Length10 metres standard, 100 metres maximum
Service RequirementAutomatic Self Cleaning
Seal Service every 3500 cleans (application dependent)
Environmental Data
Operating Temperature0 to 50ºC
Interface to Monitor
Power Supply12 VDC from Monitor
Sensor OutputModTechw², RS485
Measurement Characteristics
Range0 - 20,000 mg/l
Accuracy±5% of reading or 100 mg/l whichever is greater
Limit of Detection100 mg/l
Minimum Operating Range0 - 2,000 mg/l
Measurement PrincipleLight Attenuation
Wavelength860 nm Infrared
Pressure Rating (Depth)1Bar or 14.5 psi
FlowrateNot affected by flowrate, avoid deadspots and extreme turbulence
UnitsUser Selectable mg/l, g/l, ppm, %SS, NTU
The actual measuring range will depend on the nature of the sample being monitored, for processes normally operating at 10,000 mg/l or more should consider use of the HR version of this sensor.
Processes that use carbon will provide higher than expected readings and the HR version of the sensor should be used.
Part NumberDescription
223617TurbiTechw² LA Sensor (Cable Length: 10 metres, Nitrile Seals)
223872TurbiTechw² LA Sensor (Cable Length: 20 metres, Nitrile Seals)
223873TurbiTechw² LA Sensor (Cable Length: 10 metres, Viton Seals)
223874TurbiTechw² LA Sensor (Cable Length: 20 metres, Viton Seals)
Mounting Shafts
152703FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 1.0 metres)
152701FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 2.0 metres)
152705FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 3.0 metres)
Mounting Brackets
223980FlexTech Sensor Bracket (Handrail Ø 43 to 60.3 mm)
224567FlexTech Sensor Bracket Extension Assembly (500 mm Long, Handrail Ø 43 to 60.3 mm)
Seal Service Pack
156260Seal Service Pack - TurbiTechw² LA/LS, Nitrile H RIngs
156261Seal Service Pack - TurbiTechw² LA/LS, Viton H RIngs

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