Analyzing Sensor Measurements

Use the Time-Series Chart on a sensor’s History tab to see how its readings change over time. The chart is located below the Sensor Summary.

1. Select parameters. Open the first dropdown above the chart and select up to two parameters, such as Temperature and Humidity.
2. Set the date range. Click the date-and-time field and choose the period you want to review. You can select up to one year of available history.
3. Choose a time interval. Open the next dropdown (for example, By 15 minutes) to choose how readings are grouped along the timeline.
4. Choose an aggregation type. Open the Avg dropdown to choose how numeric readings within each interval are summarized. Avg means average.
5. Review the chart. Hover over the plotted data to see readings and timestamps.

The horizontal axis shows time; the vertical axis shows measurement values. The legend identifies each selected parameter. A gap in a line indicates that no valid measurement is available for that period.

Select two parameters in the first dropdown. They appear on the same chart and can use separate vertical axes - for example, Temperature (°C) on the left and Humidity (%) on the right. Both use the same date range, time interval, and aggregation settings.

The screenshots below show the chart controls. Click any image to open it at full size.

If thresholds are configured for the selected parameters, you can choose whether to show them on the chart.

1. Click the Settings (gear) icon at the upper-right of the chart.
2. In Visibility Preferences, turn Thresholds on or off.
3. Click Apply to save the change, or Cancel to leave the setting unchanged.

Tip: If the chart is empty, check the selected parameter and date range. The sensor may not have reported measurements during that period.

For readings in a table or CSV download, see Viewing and Exporting Historical Data.