Device class of existing sensor

Configuration
1

Hello
How can I get information about the device class of an already existing sensor?

2

Developer tools → States. It will be listed in the attributes column if it has one.

Screenshot 2022-09-04 at 19-38-35 Developer Tools – Home Assistant
Screenshot 2022-09-04 at 19-38-35 Developer Tools – Home Assistant1186×582 26.9 KB

3

Thank you for your instant answer.
I understand that if this information is missing a default general purpose sensor is being used.

4

If there is nothing listed then it is device_class: none