Self Cleaning Sensor for Suspended Solids and Turbidity Monitoring
The TurbiTechw² LS Sensor is designed to monitor the levels of suspended solids or turbidity typically found in final effluent from municipal and industrial wastewater treatment plants. It is also great at monitoring solids in the intake to both effluent and drinking water treatment processes.
Monitoring of these key parameters requires sensors that are reliable and accurate, the TurbiTechw² LS meets this requirement perfectly. The large optical surfaces and sample volume ensure that the information provided by the sensor is both representative of the process and tolerant of fouling. 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.
Overview:
The TurbiTechw² LS Sensor employs infrared light at 860 nm using the 90º Light Scatter principle in accordance with ISO7027 (2000). 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.
General Specification
PhysicalDimensions (hxwxd)Ø80mm, 470 mm longWeight2.2 kgProtection ClassIP68Enclosure MaterialBlack Acetal Co-Polymer, 316 Stainless Steel, GlassSeal MaterialPolyurethane, Nitrile, with option of VitonCable EntryIntegral Cable GlandCable Length10 metres standard, 100 metres maximumInterface to MonitorPower Supply12 VDC from MonitorSensor OutputModTechw², RS485Environmental DataOperating/Storage Temperature0 to 50ºCLocationIndoor/OutdoorPressure Rating1 Bar or 14.5 psiMaintenanceServiceSeal 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 Specification
| Measurement Characteristics |
| Principal of Operation |
90° Light Scatter
ISO 7027 Compliant |
| Wavelength |
860 nm Infrared |
| Accuracy |
+/-5% of reading or 1NTU whichever is greater |
| Resolution |
Dependent on range setting, typically +/-2% of reading |
| Display Resolution |
see 7300w² Monitor |
| Response Time |
0.5 seconds damping provided by monitor |
| Flowrate |
Not affected by flowrate, avoid deadspots and extreme turbulence |
| Units |
User Selectable mg/l, g/l, ppm, %SS, FTU, NTU |
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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.
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