Temperature
A temperature rule alerts you when a tag's temperature goes above a high threshold, below a low threshold, or both. Use it to protect cold-chain shipments, monitor equipment, or catch a store room drifting out of a safe range.
Temperature rules work with any tag that reports a temperature reading. See position history and sensor data for how sensor readings arrive.
How it works
You set a high threshold, a low threshold, or both. A tag is in violation whenever its latest temperature reading is above the high threshold or below the low threshold. The alert resolves automatically as soon as the reading returns within range.
An optional trigger delay avoids false alarms from brief excursions — a freezer door opening, a pallet passing through a warm loading bay. The reading must stay out of range for the whole delay before the alert fires. With no delay, the alert fires on the first out-of-range reading.
Units
Thresholds are shown in your workspace's unit setting. Whether your workspace uses metric or imperial, the rule form, the readings, and the alert message all use the same unit. A temperature alert reads, for example:
Temperature 22.0°C is 4.0°C above the high threshold of 18.0°C
Parameters
| Parameter | Description |
|---|---|
| High threshold | Alert when the temperature rises above this. Optional if a low threshold is set. |
| Low threshold | Alert when the temperature falls below this. Optional if a high threshold is set. |
| Trigger delay | How long the reading must stay out of range before the alert fires (0–120 minutes). Set to 0 to alert on the first out-of-range reading. |
| Auto-resolve | On by default: the alert resolves when the temperature returns to range. Turn it off to keep the alert open until you resolve it manually. |
At least one threshold is required. If you set both, the high threshold must be above the low threshold.
See the rule types reference for the full parameter specification.
Example: cold-chain shipment
A distributor ships vaccines that must stay between 2°C and 8°C.
- Create a temperature rule with a low threshold of 2°C and a high threshold of 8°C.
- Set a 10-minute trigger delay so a brief door-open during loading doesn't fire an alert.
- Give it a high severity so it raises an alert to acknowledge and resolve, and add an email notification.
- If a shipment stays out of range for more than 10 minutes, the team is alerted with the exact breach — and the alert clears automatically once the temperature recovers.