The Dwyer Instruments 1910-0 Differential Pressure Switch is an essential part for measuring pressure variations in HVAC systems particularly in the range of 0.15”WC to 0.55”WC. This switch compares pressure at two different points and will be useful in controlling the airflow as well as performing practically in applications like air conditioning, ventilation among others. Through co... https://www.partshnc.com/1910-0-dwyer-instruments-1555-differential-switch