The Honeywell 408NPPS-2.5K part is an anemometer designed for duct mounting applications in air handling units, furnaces/boilers, rooftop systems, and other heating/ventilation/air conditioning (HVAC) equipment. This anemometer features a stainless steel, static-venturi-type design, with a maximum static pressure rating of 2.5 inches water gauge (25 kPa). It is designed with a 28-inch (711 millimeter) diameter sensing element, and a non-slip probe assembly that is installed in the airflow, measuring the air velocity and temperature. The anemometer is also equipped with an integral moisture filter on the probe, as well as galvanized steel mounting brackets for secure installation. This anemometer produces a modulated digital output signal with a fixed-range of 0 to 20,000 feet per minute (fpm) (0 to 10 meters per second). This Honeywell part is suitable for use in industrial and commercial applications.