The GF-N3000-UI is an airflow and temperature measurement device with a contact closure airflow alarm and BAS connection via RS-485 field selectable BACnet MS/TP or Modbus RTU. It is provided with a single integrated duct probe but can handle up to two integrated universal insertion probes. On analog output AO1, the GF-N3000-UI provides a linear analog output signal for the average airflow of one or two probes.