Clearing sensor alerts on Conserv is straightforward. Move your mouse over the alert count on the sensor that triggered the alert, and click the 'X' to clear those alerts.
If you don't see the alert count, this means you only had one alert triggered. The 'X' will still be in the same spot, you just need to move your mouse over to the right side of the alert bar to find it. After more than one alert has been triggered, you will then see the alert count appear in the same area.