Sensor Information:
We currently deploy four types of sensors which measure Dissolved Oxygen. These are summarized in the following table:
| Click sensor name for link to manufacturer website | SeaBird SBE 43 | SeaBird SBE 37-SMP-IDO | SeaBird SBE 63 | Aandera Optode (3835) |
|---|---|---|---|---|
| Sensor Methodology | Polarographic/Clark electrode type sensor | Polarographic/Clark electrode type sensor | Optical/Luminescent | Optical/Luminescent |
| Accuracy | +/-2% (Initial) | +/-2% (Initial) | +/-2% (Initial) | <8uM below 160uM & 5% above 160uM |
Calibration Evaluation:
The dissolved oxygen sensors are calibrated by the manufacturer. Sensors are periodically recovered from the stations (where possible) for calibration checks. The length of deployment between sensor evaluations will be a function of many factors including the type of station and ease of access as well as sensor type. When recovered, the sensors are placed in a well stirred and aerated tank and the readings are checked against each other and typically against one or more freshly calibrated sensors and a YSI optode. For remote buoy deployments the sensors are checked prior to and following recovery. The results of these sensor cross-checks are used to determine when a sensor should be returned to the manufacturer for re-calibration. The sensor check data are also used to calculate corrections for measured drift and the data quality is flagged accordingly. Details of data corrections will be provided in the metadata, may be described in a supporting document and can be found on the QA/QC Archive link at the bottom of this page.
Dissolved Oxygen QA/QC Archive
| PDF or hyperlink | Dates | Description |
|---|---|---|
| SATURN-01 | ||
| data quality summary | 8/3/10 – 1/31/17 | evaluation/validation of calibration & sensor performance |
| s1-do01 | Identifying and correcting for periods of insufficent flow to the sensor | |
| SATURN-02 | ||
| data quality summary | 2011 -2019 | evaluation/validation of calibration & sensor performance |
| s2-do01 | estimated salinity for 1m sensor deployment (2012) | |
| SATURN-03 | ||
| data quality summary | 6/13/10 – 7/15/20 | evaluation/validation of calibration & sensor performance |
| s3-do01 | 6/13/10 – 3/2/11 | performance evalution; drift correction |
| s3_do02 | 12/18/12 – 5/31/13 | performance evalution; drift correction |
| s3-do03 | 5/31/13 – 2/20/14 | performance evalution; drift correction |
| s3-do04 | 2/20/14 – 11/8/14 | performance evalution; drift correction |
| s3-do05 | 11/8/14 – 4/3/15 | performance evalution; drift correction |
| s3-do06 | 4/4/15 – 10/30/15 | performance evalution; drift correction |
| s3-do08 | 10/30/15 – 9/1/17 | performance evalution; drift correction |
| s3-do09 | 4/19/19 – 7/13/20 | performance evalution; drift correction |
| s3-do10 | 7/1/20 – 12/1/20 | performance evalution; drift correction |
| SATURN-04 | ||
| data quality summary | 9/23/09 – 7/1/20 | evaluation/validation of calibration & sensor performance |
| s4-do01 | 4/8/13 – 2/20/14 | performance evalution; drift correction |
| s4-do02 | 2/20/14 – 11/8/14 | performance evalution; drift correction |
| s4-do03 | 11/8/14-2/23/16 | performance evalution; drift correction |
| s4-do04 | 2/23/16 – 9/1/16 | performance evalution; drift correction |
| s4_do05 | 4/14/18 – 7/1/20 | performance evalution; drift correction |
| s4_do06 | 7/1/20 – 12/1/20 | performance evalution; drift correction |
| SATURN-07 | ||
| data quality summary | 12/4/12 – 5/1/19 | evaluation/validation of calibration & sensor performance |
| s7-do01 | 1/15/15 – 2/1/17 | performance evalution; drift correction |
| SATURN-09 | ||
| data quality summary | 9/8/14 – 2/1/20 | evaluation/validation of calibration & sensor performance |
| s9-do01 | 10/10/14 – 6/10/16 | evaluation/validation of calibration |
| SATURN-10 | evaluation/validation of calibration & sensor performance | |
| data quality summary | 8/28/16 – 12/17/16 |