Turbidity (Tu)
Any RBRsolo⁴ or RBRduet⁴ that measures turbidity uses the RBR realtime turbidity sensor, which has two independent optical channels for optimising linearity and sensitivity (see Fig. 9). During deployments, minimise direct sunlight.
Fig. 9. RBRsolo⁴ Tu | 2x: Turbidity sensor.
Turbidity
| Parameter | Value |
|---|---|
Channel wavelength |
880nm |
Centroid angle |
90° |
Linearity, R2 |
0.99 |
Initial accuracy |
5% |
Calibrated range1 |
0-1000FTU |
Measurement range1 |
0-1500FTU |
Detection limit |
0.005FTU |
1 Response becomes non-linear above 1000FTU.
Turbidity (optical backscatter)
| Parameter | Value |
|---|---|
Channel wavelength |
880nm |
Centroid angle |
135° |
Linearity, R2 |
0.99 |
Initial accuracy |
5% |
Calibrated range1 |
1000-4000FTU |
Measurement range1 |
0-20000FTU |
Detection limit |
2.0FTU |
1 Response is linear between 500 and 15000FTU.