Is a circulator required with the Hach LDO sensor?

FAQ - Hach LDO™

1. Are first and second generation LDO sensors interchangeable?
2. What is the difference between the first and second generation Hach LDO sensor for Hydrolab sondes?
3. What is the recommended calibration procedure for Hach LDO?
4. What is Hach LDO and how does it work?
5. Q: Is a circulator required with the Hach LDO sensor? A: No. Because the Hach LDO sensor does not consume oxygen, it is not necessary to continually replenish the water sample around the sensor.
   
   
6. Will fouling affect the DO readings from a Hach LDO sensor?
7. How long will the sensor cap last?
8. What is the warranty on the Hach LDO sensor?