The only disadvantage of the Vernier Optical DO Probe (ODO-BTA) is that it costs more. It is both easier to use and more accurate than the older Dissolved Oxygen Probe (DO-BTA). The chart below shows a feature comparison.

Feature Optical DO Probe Dissolved Oxygen Probe
No calibration required ✓
No stirring required ✓
No warm-up time ✓
No electrode filling solution ✓
Automatic pressure compensation ✓
Automatic temperature compensation ✓ ✓
Measure in mg/L ✓ ✓
Measure in % saturation ✓
Compatible with LabQuest interfaces (all models) ✓ ✓
Compatible with Go!Link ✓
Order Code ODO-BTA DO-BTA
Published: January 15, 2015. Updated: August 7, 2020.