Monitoring Fire Smoke Dampers- How Do You Do It?

We are having an issue with monitoring our Fire Smoke Dampers (FSD's). The FSD's are closing but not triggering an alarm because the actuator does not close all the way before the damper in the duct is totally closed. To get a trouble signal the Belimo FSLF120 -S -FC model we use needs to close all the way.

So right now the only way we know a damper has failed is when people start complaining about heat/airflow/etc. Then maintenance has to trace the duct to find the exact FSD that has failed. Not a good system. So looking for some ideas on how others are doing this and getting notified.

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