Dwyer Instruments 1638-2 Differential Pressure Switch W/Visible Setpoint Adjustment 1"-3"WC

The Dwyer Instruments 1638-2 differential pressure switch is widely used in HVAC systems to monitor and regulate air pressure. It works by detecting the difference in air pressure between two points in a system and sending an electrical signal when the pressure difference exceeds a user-defined threshold. This promotes optimal airflow throughout the system, reducing equipment damage and ensuring efficient operation. The 1638-2 has a visible setpoint indicator that allows for simple adjustment and monitoring of the pressure threshold. In essence, it serves as a safety switch for HVAC systems, maintaining proper air pressure and preventing potential problems. It monitors the difference in air pressure between two points in a system and activates an electrical switch when that difference exceeds a user-defined set point.