What is digital airflow indicating system comprised of?

• A. AIP + one sensor assembly
• B. AIP + two sensor assemblies
• C. AIP only
• D. Two sensor assemblies only

Answer: (A)

A digital airflow indicating system needs two parts: the sensor that actually detects the airflow and the Airflow Indicating Panel that processes and displays the reading. The Airflow Indicating Panel is the display/processing unit, while the sensor assembly provides the airflow measurement that feeds into the AIP. In the standard configuration, you have one sensor assembly feeding the AIP, giving a single, readable airflow indication. Adding a second sensor would be extra redundancy or complexity not required for the basic setup, and removing either component leaves you with no complete system—the display/processing unit alone or the sensor alone don’t provide the full indication. So the correct arrangement is the Airflow Indicating Panel plus one sensor assembly.