Vernier Tech Info Library TIL #1413

Dissolved Oxygen Probe Detail Information

Dissolved Oxygen Sensor, order code DO-BTA, $205.00
Specifications and User Guide

TROUBLESHOOTING
-Primary Test: Is the D.O. Probe connected to a LabPro with a pH, Conductivity, ISE, or Direct-Connect Temperature Probe? If so, remove the D.O. probe and connect it to another LabPro.
-Primary Test: Make sure that the D.O. Probe itself is as far away as possible from a pH, Conductivity, ISE, or Direct-Connect Temperature Probe.
-Primary Test: Make sure that the probe is placed in a large container or water and that the sensor is gently swirled during data collection.
-Secondary Test: If calibration is unsatisfactory, remove and refill the membrane cap with electrode solution and calibrate the probe again.
-Secondary Test: Check for an air bubble inside the membrane cap.

PUBLIC TIL ENTRIES
-TIL 1020: What are the CO2 Gas Sensor power issues? Can I use two CO2 Gas Sensors at the same time?
-TIL 1060: Do any of your sensors require special storage?
-TIL 761: Do you sell the DO Calibration Solution (sodium sulfite)?
-TIL 372: Suggestions for using the Dissolved Oxygen Probe.
Public List of TIL Entries for DO-BTA

SPECIFICATIONS
-new order code: DO-BTA
-old order code: DO-DIN
-Range: 0 to 15 mg/L (or ppm)
-Accuracy: +/-0.2 mg/L
-Resolution, 12-bit (LabPro, Go! Link, ULI II, Serial Box): 0.007 mg/L
-Response Time: 95% of final reading in 30 seconds, 98% in 45 seconds
-Temperature Compensation: automatic from 5 to 35 deg C
-Pressure Compensation: manual, accounted for during calibration
-Salinity Compensation: manual, accounted for during calibration
-Minimum Sample Flow: 20 cm/s

CALIBRATION
-Calibrate? Not always. If your experiment seeks to measure only a change in dissolved oxygen then the stored calibration is suitable. If you plan to make discrete measurements of dissolved oxygen in a natural body of water, then calibration is recommended.
-The calibration process for this sensor is lengthy. Refer to the sensor booklet for detailed instructions.

RELATED VERNIER PRODUCTS
-DO Calibration Solution, order code DO-CAL, $4.00 (500 mL)
-DO Filling Solution, 125 mL, order code FS, $6.00 (60 mL)
-DO Polishing Strips, order code PS, $4.00 (5 strips)
-Membrane for DO Sensor, order code MEM, $13.00
-Sodium Sulfite Standard Solution, 2.0 M, 65 mL bottle, Flinn Scientific order code SO426
-Sodium Sulfite, anhydrous solid, 500 g bottle, Flinn Scientific order code SO111

Created by: jrandall on May 07 2005
Last updated by: jmcbride on October 19 2007