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Turbi-Tech 2000LA Suspended Solids Sensor

Self Cleaning Suspended Solids Sensor

The Turbi-Tech 2000LA 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 fully automatic self cleaning system ensures that manual intervention on a routine basis is not required.

For specialist advice call:

+44 (0)1726 879800

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

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.

The Turbi-Tech 2000LA Sensor uses Infrared Light at 860 nm and operates using the Light Attenuation Principle. The cleaning mechanism uses a polyurethane wiper seal, backed 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 7200 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.

Physical
Dimensions (hxwxd)Ø80mm, 470 mm long
Weight2.2 kg
Protection ClassIP68
Enclosure MaterialBlack Acetal Co-Polymer, 316 Stainless Steel, Glass
Seal MaterialPolyurethane, Nitrile, with option of Viton
Cable EntryIntegral Cable Gland
Cable Length10 metres standard, 100 metres maximum
Interface to Monitor
Power Supply12 VDC from Monitor
Sensor OutputPWM
Environmental Data
Operating/Storage Temperature0 to 50ºC
LocationIndoor/Outdoor
Pressure Rating10 mWC
Maintenance
ServiceSeal Service every 3500 cleans (application dependent)
CalibrationThe sensor is inherently stable, calibration should be carried out to suit the application. Our recommendation is every 6 months.
Measurement Characteristics
Principal of OperationLight Attenuation/Scatter
Wavelength860 nm Infrared
AccuracyBetter than +/-5% of reading on real sample
ResolutionDependent on range setting, typically +/-2% of reading
Response Time0.5 seconds damping provided by monitor
FlowrateNot affected by flowrate, avoid deadspots and extreme turbulence
UnitsUser Selectable mg/l, g/l, ppm, %SS, NTU
Maximum Range0-20,000 mg/l (0-10,000 NTU)
Minimum Range0-4,000 mg/l (0-2,000 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
146000Turbi-Tech 2000LA Sensor (Cable Length: 10 metres, Nitrile Seals)
222633Turbi-Tech 2000LA Sensor (Cable Length: 20 metres, Nitrile Seals)
Mounting Shafts
152703FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 1.0 metres)
152701FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 1.0 metres)
152705FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 1.0 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
1562260Seal Service Pack - TurbiTechw² LA/LS, Nitrile H RIngs
156261Seal Service Pack - TurbiTechw² LA/LS, Viton H RIngs

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