Numeric thresholds and hysteresis
Use different alarm and recovery thresholds to avoid repeated messages around a limit.
On this page
What you need
A numerical series with current values and a notification destination.
How to do it
- Choose the series and a comparison such as above, below, inside or outside a range.
- Set separate alarm and recovery thresholds. For example, alert above 90% and recover below 85%.
- Choose the latest value or an average, minimum or maximum over a window. Set the required duration and destination.
Good to know
The gap between thresholds is called hysteresis. A minimum duration ignores short spikes. Windows range from 10 to 900 seconds and must cover at least two expected reporting intervals.
Missing or stale readings cannot confirm a lasting condition. Late historical values can update history without sending an old alarm.
If something goes wrong
Check current values, the reporting interval and window size if a rule remains pending. Use a missing-data rule to detect gaps.
Related guides
- Set up alarms and notifications
Choose meaningful alarm conditions, connect destinations and understand incidents.
- Alarms for missing data and device heartbeats
Be notified when readings or device heartbeats stop arriving.
- Maintenance, pause and mute
Choose pause, mute or maintenance for planned interruptions.