Dwyer Instruments 1823-40 Low Differential Pressure Switch 5"-44" WC

The Dwyer Instruments 1823-40 Low Differential Pressure Switch is a precision component used for measuring low differential pressures in HVAC systems, with an operating pressure range of 5”–44” water column. It operates on the Pressure Tap differential Concept where a switch compares pressure at two points and can therefore detect pressure differences that characterize air flow irregularity or filter clogging. This system is widely applied in HVAC systems such as air handling units, ventilation ducts, and cleanrooms. The advantages of this change include better energy utilization because the fan speeds are adjusted depending on the pressure readings better IAV due to proper airflow control, and better reliability as the system will notify the need for maintenance.