How often should I change the wiper?

FAQ - DataSonde 5X

1. Do I need to purchase a Self-Cleaning Turbidity sensor with the DataSonde 5X?
2. Q: How often should I change the wiper? A: Hydrolab's brush is designed to retain its effectiveness for a long period of time because our fibers are very strong and our design will not allow them to separate over time. However, in extremely active environments, the brush itself can become fouled and reduce its effectiveness. Hydrolab includes 4 replacement brushes with the maintenance kit for the DataSonde 5X, so you will not incur any additional costs if a change is needed.