Can you please explain how your airflow sensor works?

AKCPIntelligent Sensors, Support

The way the air flow sensor works is there are two thermistors, one internal and one external. A thermistor changes resistance based on air temperature. The internal thermistor is the reference point and the external thermistor changes when the airflow is blown across the top of the sensor, the difference is this raw output reading. Then the raw output reading is calculated into the presence or absence of airflow.

AKCPCan you please explain how your airflow sensor works?