Do I need a circulator?

FAQ - Dissolved Oxygen

1. What is the difference between Hydrolab's Clark Cell technology and competitors?
2. Q: Do I need a circulator? A: Standard Methods Article 4500-OG states that any Clark Cell DO sensor must have sufficient sample flow across the membrane surface. The easiest and most consistent means of supplying this flow is to pair the DO sensor with a sample 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. 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?