United Electric J21K-232 Differential Pressure Switch SPDT 0-25 PSI NEMA-4

The United Electric J21K-232 is a single pole, double throw  differential pressure switch designed to provide precise control in HVAC systems. It works by measuring the difference in air pressure between two locations and, upon reaching a certain point, turning on a snap-action switch. The range of this movable set point is 0 to 25 PSI . The switch is perfect for severe settings with water, dust, or other contaminants because of its durable NEMA 4 enclosure. The J21K-232 is frequently used in dampers, fan systems, and air handling units. It aids in maintaining ideal pressure and airflow conditions. It maximizes system efficiency, guards against overpressurization, and guarantees adequate ventilation. Its adjustable set point allows for fine-tuning performance to meet specific needs and preferences.