I2Q MQ-4 Methane/Natural Gas Sensor Mini Module Questions

I was considering purchasing this product but had a couple of questions I would like to have answered before doing so.

  1. Is this considered an MOS (metallic oxide semiconductor) sensor?
  2. If so, what metal oxide is used for this sensor?
  3. How sensitive is this sensor to various environmental factors such as temperature and pressure?
  4. How would one calibrate this sensor effectively? Are there ranges of output values to expect for certain ppm’s of CH4?

Thank you!

The Datasheet for the sensor here may answer several of your questions:

On board this sensor is connected to this ADC which connects to the processor via I2C: