Sensor Information:
We currently deploy three types of sensors which measure turbidity. These are summarized in the following table:
| Click sensor name for link to manufacturer website |
WETLabs ECO FLNTU (& puck) | Turner Designs Cyclops 7 | MultiExciter2 |
|---|---|---|---|
| Excitation Wavelength | 700 nm | 850 nm | 880 nm |
| Detection | Measures scatter at 80-85° | Measures scatter at 90° | Near IR backscattering |
| Sensor Format | Outward looking | Flow through | Outward looking |
1 As part of a LOBO mooring
Data Units:
The FLNTU and MulitExciter are calibrated against formazine solutions whereas the Turner Designs sensors are sensors are not factory calibrated and the data from these sensors are currently in relative fluorescent units (rfu).
QA/QC protocols:
Our current quality control measures rely primarily on regular sensor cleanings and manufacturer calibration. Calibrations are monitored with regular DI readings at Saturn-03 and Saturn-04 and with pre-deployment and post-deployment DI readings with sensors deployed at other stations.
Turbidity QA/QC Archive
| Link | Dates | Description |
|---|---|---|
| SATURN-01 | ||
| s1_turb01 | 4/13/08 – 6/15/12 | calibration quality evaluation |
| SATURN-04 | ||
| s4-turb01 | 9/23/09 – 5/1/16 | QC detials |
| SATURN-03 | ||
| s3-turb01 | 8/1/20 – 3/1/21 | corrections for recurrent fouling episodes |
| SATURN-07 | ||
| s7-turb01 | 1/1/15 – 5/1/16 | QC details (Turner Designs Cyclops 7 turbidity) |
| SATURN-09 | ||
| s9-turb01 | 9/8/14 – 5/1/16 | QC details (Turner Designs Cyclops 7 turbidity) |