Maintenance - How to Change Cap and Gel on a PPM Sensor This Article and video illustrates how to change the cap and gel on a PPM sensor for the Edge 200, 500, and DCM 500 series.
![VivoAquatics Anderson-Sep-30-2020-10-44-18-90-PM.png]](https://helpcenter.vivoaquatics.com/hs-fs/hubfs/Google%20Drive%20Integration/VivoAquatics%20Anderson-Sep-30-2020-10-44-18-90-PM.png?height=40&name=VivoAquatics%20Anderson-Sep-30-2020-10-44-18-90-PM.png){kind=small}