Should I calibrate using mg/L solution or % saturation?

FAQ - Dissolved Oxygen

1. What is the difference between Hydrolab's Clark Cell technology and competitors?
2. Do I need a circulator?
3. What happens if I change altitude after calibrating my DO sensor?
4. Will the brush on my DataSonde 4X damage the membrane on my DO sensor?
5. How can I determine Barometric Pressure when calibrating my Dissolved Oxygen sensor?
6. Q: Should I calibrate using mg/L solution or % saturation? A: Standard methods for DO calibration suggest that a DO sensor should be calibrated to match a known mg/L standard or the mg/L measurement of a Winkler titration. However, air calibration using "% saturation" is considerably faster and easier, and does not require any known calibration solution.
   
   
7. How often do I need to change the DO membrane?
8. How long should I wait after changing my DO sensor membrane to perform the calibration?
9. How often should I calibrate DO?