What happens if I change altitude after calibrating my DO sensor?

FAQ - Dissolved Oxygen

1. What is the difference between Hydrolab's Clark Cell technology and competitors?
2. Do I need a circulator?
3. Q: What happens if I change altitude after calibrating my DO sensor? A: The Dissolved oxygen readings in mg/L are based on a known saturation (100%) at a known Barometric Pressure; therefore, these readings remain accurate. Percent saturation readings, however, would no longer remain accurate without a new calibration.
   
   
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. Should I calibrate using mg/L solution or % saturation?
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?