SEN0440 (MiCS-5524) Confusing Gas Detection Specs and No I2C Interface? Need Clarification

Hi everyone,

I’m planning to use the SEN0440 (MiCS-5524) gas sensor in my project, but after reading the wiki and sample code, I found several confusing points and hope someone with real experience can clarify them.

The wiki mentions an I2C interface, but the hardware image only shows Analog Value and Enable pins. Does this module actually support I2C communication, or is it analog output only?Is it possible to get separate PPM/PPB values for gases like CO, CH4, NH3, H2, H2S, etc., individually? Or does the sensor only provide a mixed gas response?The documentation seems inconsistent. Some sections mention 8 detectable gases, others mention 5 or 6. How many gases can this sensor realistically identify or measure individually in practical use?

From what I understand so far, it looks more like a general air quality / combustible gas sensor rather than a true multi-gas analyzer, but I’d love to hear feedback from people who have actually used it in real projects.

Thanks!

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