Units of sensor readings

Hi ,

I need to know the units of sensors readings below. If there’s conversion needs to be done can you share the codes?

air_quality = grovepi.analogRead(Airquality)
light_intensity = grovepi.analogRead(LightSensor)
sound_level = grovepi.analogRead(SoundSensor)

Thank you

I believe they all go from 0 to 1023 and are not quite physical units.

The only one that has any qualitative value seems to be (you don’t state what sensor you are using …) a SeeedStudio Grove AirQuality sensor:

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