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 fully automatic self cleaning system ensures that manual intervention on a routine basis is not required.
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 TurbiTechw² LA 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|
|Weight||2.2 kg (inc 10 metres of cable)|
|Enclosure Material||Black Acetal Co-polymer|
|Cable Entries||Integral Cable Gland|
|Wetted Parts||Black Acetal, 316 Stainless Steel, Glass, Polyurethane, Nitrile|
|Cable Type||4 core, 2 Twisted Pair, 9 mm O/D Polyurethane Coated|
|Cable Length||10 metres standard, 100 metres maximum|
|Service Requirement||Automatic Self Cleaning
Seal Service every 3500 cleans (application dependent)
|Operating Temperature||0 to 50ºC|
|Interface to Monitor|
|Power Supply||12 VDC from Monitor|
|Sensor Output||ModTechw², RS485|
|Range||0 - 20,000 mg/l
Not suitable for measuring <2,000 mg/l
|Accuracy||±5% of reading or 250 mg/l whichever is greater|
|Measurement Principle||Light Attenuation|
|Wavelength||860 nm Infrared|
|Pressure Rating (Depth)||1Bar or 14.5 psi|
|Flowrate||Not affected by flowrate, avoid deadspots and extreme turbulence|
|Units||User 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.
|223617||TurbiTechw² LA Sensor (Cable Length: 10 metres, Nitrile Seals)|
|223872||TurbiTechw² LA Sensor (Cable Length: 20 metres, Nitrile Seals)|
|223873||TurbiTechw² LA Sensor (Cable Length: 10 metres, Viton Seals)|
|223874||TurbiTechw² LA Sensor (Cable Length: 20 metres, Viton Seals)|
|152703||FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 1.0 metres)|
|152701||FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 1.0 metres)|
|152705||FlexTech Mounting Shaft (TurbiTechw² LA/HR/LS, 1.0 metres)|
|223980||FlexTech Sensor Bracket (Handrail Ø 43 to 60.3 mm)|
|224567||FlexTech Sensor Bracket Extension Assembly (500 mm Long, Handrail Ø 43 to 60.3 mm)|
|Seal Service Pack|
|156260||Seal Service Pack - TurbiTechw² LA/LS, Nitrile H RIngs|
|156261||Seal Service Pack - TurbiTechw² LA/LS, Viton H RIngs|
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