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TurbiTechw² HR Suspended Solids Sensor

Self Cleaning Sensor for Suspended Solids and Turbidity Monitoring

The TurbiTechw² HR Sensor has been specifically designed for use in wastewater treatment systems where high levels of suspended solids are desirable in the aeration phase. Membrane Bio Reactors (MBR) typically run with MLSS values in the region of 8,000 to 14,000 mg/l. High MLSS concentrations promote numerous process benefits, including stable operation, complete nitrification, and reduced biosolids production reducing biological volume requirements (and associated footprint) to only 20-30 percent of conventional biological processes.

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  • Overview
  • General Specification
  • Measurement Specification
  • Ordering Information & Spare Parts

The TurbiTechw² HR sensor is suitable for monitoring solids in higher ranges than the standard LA version of the sensor due to it’s shorter path length.

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. 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 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

The TurbiTechw² HR Sensor uses infrared light at 860 nm and operates using the Light Attenuation Principle. The cleaning mechanism uses a polyurethane wiper seal, sealed by 2 Nitrile ‘H’ Rings that finish the cleaning process. The Nitrile seals can be exchanged for Viton if the process media dictates. 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 6 hourly cleaning cycle.

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 RequirementSeal 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 - 50,000 mg/l
Accuracy±5% of reading or 250mg/l whichever is greater
Limit of Detection250 mg/l
Minimum Operating Range0 - 5,000 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
UnitsFAU, mg/l, ppm, g/l, %SS, User Defined
The actual measuring range for Suspended Solids will depend on the nature of sample being monitored and cannot be guaranteed.
Part NumberDescription
223882TurbiTechw² HR Sensor (Cable Length: 10 metres, Nitrile Seals)
223884TurbiTechw² HR Sensor (Cable Length: 20 metres, Nitrile Seals)
223883TurbiTechw² HR Sensor (Cable Length: 10 metres, Viton Seals)
223885TurbiTechw² HR 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
220607Seal Service Pack - TurbiTechw² HR, Nitrile H RIngs
220608Seal Service Pack - TurbiTechw² HR, Viton H RIngs

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