Dwyer Instruments PAFS-1004 Sensor 319852-301 check for continuity across the

check for continuity across the normally open contacts when the relay is in the upright (disconnected) position versus when the internal plunger is engaged

Optimizing airflow within a commercial or residential air handler requires precision components

Compatibility depends on the specific firmware version of your controller

it provides a 7-11" w

Designed for seamless integration with 24V HVAC control circuits

Dwyer Instruments PAFS-1004 Sensor 319852-301 check for continuity across theThe Dwyer Instruments PAFS 1004 is a precision engineered averaging flow sensor designed for heavy duty HVAC and industrial air handling systems. This pitot tube air flow sensor features a 7 21 32" insertion length, making it ideal for accurate velocity measurements in smaller ductwork. Utilizing a multi orifice design, the PAFS 1004 senses the total and static pressure to provide an average differential pressure signal, ensuring reliable duct airflow