Hi,

I am planning to use the MiCS sensor in a project, however I am confused my the circuit diagram that has been provided. I have attached the data sheet below.

To my knowledge this device will increase or reduce the voltage on the output depending how much gas is in the air. What I don't understand is why is there a fet after the voltage divide? Couldn't you just have that going straight into a ADC on a MUC?

Also would a mosfet be more suitable?

Cheers,

 

https://community.particle.io/t/connect-the-no2-gas-sensor-mics-2714-environmental-project/10032/21 Does a better job than we can probably do. These guys feel the datasheets are confusing.