Hi,
Does anyone know if there is a good Nitrous Oxide pollution sensor which has a I2C interface on the market?
I have only seen one, with UART and VERRRRY expensive...
Thanks for any info...
VERRRRY expensive... is a realtive term. If you want one that works properly (is 'good') then expect it to be not cheap.
There are low cost ones, such as MICS 4514, but they are toys really.
Not sure limiting yourself to I2C is going to help find a sensor. I'd try to remove this requirement.