Will the brush on my DataSonde 4X damage the membrane on 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. What happens if I change altitude after calibrating my DO sensor?
4. Q: Will the brush on my DataSonde 4X damage the membrane on my DO sensor? A: No. The brush only enhances your DO measurement accuracy because it counteracts the effects of fouling. Although Hydrolab's brush is designed to have a considerable amount of stiffness to ensure that it retains its effectiveness over time, and works in even the harshest fouling environments, it will not damage the membrane. Before releasing this product platform to our customers, Hydrolab performed extensive testing to ensure that the DO sensor would perform within specifications throughout its life.
   
   
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?