Alarm management
IoT alarm management that tells the right person, right away
Catch deviations early. Define alarm rules on any sensor value, notify the right people through the channel they use, and keep a full record of every alarm.
500+ customers · 100,000+ active sensors · Trusted by Akademiska Hus, Vattenfall, LKAB and HSB
How alarms work
From a reading to a response.
Measure
Sensors report continuously.
Rule
A rule checks values against thresholds or conditions.
Notify
The right people are alerted by e-mail, SMS, Telegram, webhook or MQTT.
Act and learn
Acknowledge, follow up and review alarm reports.
What you can set up
Flexible rules and many ways to reach people.
Threshold and condition rules
Trigger an alarm when a value goes above or below your limit, or when several conditions are true together.
Many channels
E-mail, SMS, Telegram, webhook and MQTT, plus event logging for later review.
Escalation and acknowledgement
Follow an alarm until someone takes responsibility, and escalate if nobody does.
Rules across sensors
Combine readings from several devices in one rule, for example compare an indoor and an outdoor sensor.
Actions, not just alerts
Let a rule send a downlink to a device or call another system.
Alarm reports
Review how often, how severe and when alarms occur, and tune your rules to cut noise.
Typical alarms
Where early warnings pay off.
Leaks and flooding
Get alerted at the first sign of water.
Temperature deviations
Keep cold chains and critical rooms within limits.
Indoor climate
Warn when CO₂, humidity or temperature leave the comfort range.
Process limits
Alert on pressure, level or flow outside normal range.
Energy and consumption
React to unusual consumption and peaks.
Your own conditions
Write any logic you need with the JavaScript rule engine.
Go beyond simple thresholds
Connect alarms to the rest of your operation.
Use the JavaScript rule engine for advanced logic, or connect Node-RED and n8n to create tickets, post messages to Slack or start workflows when an alarm fires. SMS, Telegram and e-mail rely on external services. In isolated on-premise networks, use webhook or MQTT to reach your own systems.
See the rule engine →Related features
JavaScript rule engine
Read more →Node-RED and n8n automation
Read more →Real-time environmental monitoring
Read more →Automated Excel reports
Read more →Frequently asked questions
How do IoT alarms work in Sensor-Online?
You define rules on sensor values. When a rule matches, Sensor-Online notifies the right people and records the event.
Which notification channels are supported?
E-mail, SMS, Telegram, webhook and MQTT, plus event logging.
Can alarms trigger actions?
Yes. Rules can send downlinks to devices or call other systems.
Can I report on alarms?
Yes. Alarm reports show frequency, severity and timing so you can tune your setup.
Does it work without internet?
Alarm rules run on your platform. Channels such as SMS and Telegram need external services, while webhook and MQTT work inside your own network.
Want fewer surprises? Talk to an engineer.
Tell us what you need to monitor, and we will help you design the alarms.
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