TurbiTechw² HR - Self Cleaning Sensor for High Range Suspended Solids Monitoring

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. 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 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 HR Sensor uses infrared light at 860 nm and operates using the Light Attenuation Principle. The cleaning mechanism uses a polyurethane wiper seal, backed by 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 5 hourly cleaning cycle.

• Membrane Batch Reactors
• Returned Activated Sludge
• ASP Control

• Automatic Self Cleaning
• Low Cost of Ownership
• Large Sample Volume

Physical

Dimensions 80 mm diameter, 470 mm long
Weight 2.2 kg
Enclosure Rating IP68
Material of Construction Black Acetal Co-Polymer, 316 Stainless Steel, Glass
Seal Material Polyurethane, Nitrile (Optional Viton)
Cable Entries Integral Cable Gland
Cable Type 4 core, 2 Twisted Pair, 5mm O/D Polyurethane Coated
Cable Length 10 metres standard, 100 metres maximum
Service Requirement Seal Service every 3500 cleans (application dependent)

Environmental Data

Operating Temperature  0 - 50ºC
Storage Temperature  -20 to 60ºC
Location  Indoor or Outdoor
Pressure Rating 10 mWC

Interface to Monitor

Sensor Output ModTechw², RS485
Power 12 VDC from Monitor

Measurement Principal

Principal of Operation Light Attentuation
Wavelength 860 nm Infrared

Measurement Characteristics

Accuracy Better than +/- 5% Reading on real sample
Resolution Dependent on range setting, typcially +/- 2%
Repeatability Better than +/- 1% Reading on real sample
Response Time 0.5 seconds - damping provided by monitor
Flowrate Not affected by flowrate, avoid deadspots and extreme turbulence
Maximum Range 0-30,000 mg/l
Minimum Range 0-10,000 mg/l
Measuring range will depend on the nature of the sample being monitored