Insights & dashboards

# Compare sensor readings between vehicles

Plot one sensor, such as fuel level or temperature, for several vehicles in one chart over a period you choose.

Updated 4 October 2026

**Who can do this:** The FMS platform feature and the vehicle permission. Internal users only.

With **Compare vehicles** in the Fleet FMS view you can put the readings of one sensor for several vehicles in a single line chart. This helps you spot a vehicle that uses more fuel, a trailer that runs warmer than the others, or a battery that drains faster.

## Compare vehicles

1. Open the dashboard and click the **Fleet FMS** tab.
2. Click the **Compare vehicles** sub-tab.
3. Add the vehicles you want to compare in **Add a vehicle…**. You can pick several of your own vehicles.
4. Choose the sensor in **Select sensor**. Only sensor types that the selected vehicles have are listed.
5. Choose the period in the calendar. By default it runs from yesterday 00:00 to today 23:59.
6. Choose the resolution, from **Per minute** to **Per week**. The default is **Per hour**.
7. Choose how readings are combined per step: **Average**, **Minimum**, **Maximum** or **Number of readings**.
8. Click **Compare**.

The **Compare** button stays disabled until at least one selected vehicle has the chosen sensor and the period is set.

## Read the chart

* Each vehicle gets its own line and an entry in the legend.
* The unit of the sensor is shown on the vertical axis.
* Vehicles that do not have the chosen sensor are left out of the chart.
* If there is nothing to show, you see **No readings in this period**.

To change the vehicles, sensor or period, click **Reset** and fill in the form again.

Use a coarser resolution, such as **Per 6 hours** or **Per day**, for long periods. The chart stays readable and loads faster.

## Related articles

* [Monitor your fleet in the Fleet FMS view](/en/help/fleet-fms-view)
* [View and compare sensor data](/en/help/sensors)
* [Add and manage vehicles](/en/help/vehicles)

## Still need help?

Our support team is happy to answer any question about Transportial.

[Contact support](/en/contact)[Report an issue](/en/report-issue)

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Canonical page: https://transportial.com/en/help/fleet-fms-compare-vehicles