Known 'unit_of_measurement' (that renders a graph)

Development
1

I have some data returned from an ESP (analog 0-1024 values) which defines the air quality.
setting the “unit_of_measurement” to “C02” results in no graph (MQTT sensor in this case).

I ideally want to have a graph rendered but instead it just displays a block view of historic data.

Is there a list of known “unit_of_measurement” that will give me what I want ?
I couldn’t find any.

2

I measure pressure using ‘hPa’ and it gives me a graph in history, I seem to remember seeing something about ‘device classes’ in the docs but can’t find the link. :frowning: