Largo, FL – March 11, 2026 – As HVAC systems increasingly rely on fan arrays to improve efficiency and redundancy, accurately measuring airflow across multiple fans has become more complex. Air Monitor Corporation, a leader in airflow and pressure measurement solutions for HVAC applications, today announced the FAN IV Fan Array Transmitter, a multi-channel airflow and pressure measurement device designed to deliver accurate, reliable fan performance data in modern HVAC systems.
Designed specifically for HVAC fan measurement applications, the FAN IV supports up to four independent measurement channels, providing individual fan airflow and differential pressure readings as well as total system airflow from a single device. When multiple fans are operated from the same variable frequency drive (VFD), up to five fans per channel can be grouped, allowing a single FAN IV to monitor up to 20 fans.
The flexible FAN IV design integrates easily with differential pressure piezo rings or traverse style fan inlet probes, making it adaptable to a wide range of fan configurations. Each channel uses an independent transducer to ensure high accuracy, delivering better than ±1% of reading accuracy with a 20:1 turndown ratio across the configured range.
Every FAN IV is individually calibrated and shipped with all
settings & outputs preconfigured for the specific application, reducing installation time and simplifying commissioning.
The transmitter includes native BACnet® and MODBUS® communications along with up to four programmable analog outputs, selectable for individual fan airflow or differential pressure, temperature, or total airflow. When used with piezometer airflow measuring rings, the FAN IV provides no obstructions in the fan inlet and complies with ASHRAE 90.1 and 189.1, supporting energy-efficient and code-compliant HVAC designs.
“The FAN IV gives engineers and facility operators a powerful, scalable solution for accurately measuring fan airflow in both new and retrofit applications,” said Kenji Nulman, Product Manager at Air Monitor Corporation. “By combining multi-channel measurement, flexible integration, and factory configuration, we’ve made it easier than ever to get reliable fan performance data.”
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