# Alerts

In Enelyzer, there are two types of alerts: Operational Alerts and No Data Alerts.

#### **Operational Alerts**

* This type of alert fires when a defined condition is met. 
* Enelyzer distinguishes between these two subtypes: 
  * **Instant Alerts:** 
    * The system checks the most recent value within a time window equal to twice the logging interval.
    * Example**:** alert fires if the temperature at a given moment falls below 18°C.
  * **Running Value Alerts**
    * The system monitors aggregated or accumulated values over a defined period.
    * Example**:** alert fires if the daily electricity consumption of a facility exceeds 500 kWh.
* Both types of alerts can be fully created and managed by users: 
  * They can be configured with custom conditions 
  * They can be linked to contact groups, so that the responsible users receive alerts (e.g. via email) during the defined period.

#### **No Data Alerts**

* No Data Alerts let you monitor automatic data ingestion of times series grouped by source. They notify you if expected data is missing, so issues are detected quickly. (e.g., Fluvius API, MQTT messages).