The TurbiTechw² LR Sensor has been specifically designed to monitor final treated, portable and filter water. The sensor is extremely sensitive and is capable of discriminating changes in Turbidity of less than 0.1 FTU. The 90º light scatter monitoring technique makes the sensor sensitive to a wide range of particle sizes, from colloidal material through to larger particles and raw waters and the large mineral particles sometimes found in distribution samples.
The TurbiTechw² LR Sensor complies with the internationally recognised ISO7027 standard for turbidity measurement. The unique sensor design captures stray light which ensures an ultra stable zero point, this is combined with an automatic self-cleaning mechanism that prevent the build up of fouling within the sample chamber. The measurement system includes a self monitoring loop that compensates for changes in optical performance.
Overview:
The sensor requires very little maintenance, with no special tools or training required. Calibration can be carried out against either a wet turbidity standard or using the dry calibration reference cell that is supplied with every sensor. The reference cell provide an extremely easy, repeatable method of checking the performance of the sensor without the cost and inherent errors associated with chemical standards.
General Specification
| Physical |
| Dimensions (hxwxd) |
440 x 200 x 200 mm |
| Weight |
4.5 kg |
| Protection Class |
IP68 |
| Enclosure Material |
Black Acetal Co-Polymer, Polypropylene |
| Seal Material |
Nitrile |
| Cable Entry |
Integral Cable Glands |
| Cable Length |
5 metres standard, 100 metres maximum |
| Process Connections |
Inlet and Drain: 1/2" BSP with 12 mm hosetail
Outlet: 1/4" BSP with 8 mm hosetail |
| Interface to Monitor |
|
| Power Supply |
12 VDC from Monitor |
| Sensor Output |
ModTechw², RS485 |
| Environmental Data |
|
| Operating/Storage Temperature |
0 to 50ºC |
| Location |
Indoor/Outdoor |
| Pressure Rating |
2 Bar |
| Maintenance |
|
| Service |
Wiper and desiccant replacement every year (application dependent) |
| Calibration |
The 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 |
| Accuracy |
Better than +/-2% of reading on real sample |
| Resolution |
Dependent on range setting, typically +/-2% of reading |
| Display Resolution |
see 7300w² Monitor |
| Response Time |
90% of step change in 2 minutes at 1 litre/min |
| Flowrate |
0.5 to 5 litres/minute |
| Units |
User Selectable FTU, NTU |
| Low Range Version |
30 NTU |
| High Range Version |
500 NTU |
| |
It has been asusmed that 1 FTU = 1 NTU for the purposes of these range statements
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