# Create Virtual Sensor

Virtual sensors are useful when you need to add an offset to a measured value or calculate the Sum, Average, and other values from sensors' measured data.

To create a Virtual sensor, navigate to the **SENSORS** menu, select the **VIRTUAL SENSORS** tab, and click **NEW VIRTUAL SENSOR** button.

A new pop-up window will open where you should select the type of calculated value Virtual sensor will present.

Click on the chosen plate to proceed to the next screen. For example, let's choose **Average**. Give the  sensor a **Name**, select **Metric** from the drop-down list (in our example, it is **Temperature**), and click to add sensors whose data will be used in the calculation.

In the new pop-up window, you can select both physical and virtual sensors with the chosen Metric. If you have a big number of sensors in your system, you can use Filter icon for selection. To change your selection, click **CLEAR ALL** button to make another choice. In our example, three physical sensors are selected. Click **ACCEPT** button to save this choice. 

Now you are back on previous screen where the chosen sensors and the calculated result are shown. Press CREATE button.

You will be informed that Virtual Sensor was created.

Now you can find this sensor in the list Virtual Sensors and manage it as a physical sensor: assign it a Tag, add it to Dashboard, create Graphs, Alarm Rules, etc.

<div data-full-width="true" data-with-frame="true"><figure><img src="/files/gQZlNsOmvmkVjXh8oDUV" alt=""><figcaption></figcaption></figure></div>


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