Description
The United Electric J21K-140 differential pressure switch is a sensitive, low-pressure control designed for precise monitoring of small pressure differences in HVAC and air handling systems. With an adjustable differential range of 0 to 6 PSI, this switch is ideal for applications such as airflow proving, filter monitoring, and static pressure control. The SPDT (single-pole, double-throw) contact configuration provides flexible control for both normally open and normally closed circuits. Housed in a NEMA 4-rated enclosure, the J21K-140 offers protection against water and dust, making it suitable for both indoor and outdoor installations in demanding environments.
Key Features
- Adjustable differential pressure range: 0–6 PSI
- SPDT switch configuration for versatile control applications
- NEMA 4 enclosure for water-resistant and dust-tight protection
- Designed for low-pressure differential monitoring
- Ideal for HVAC, air handling, and filtration systems
- Durable construction for reliable long-term performance
- Common applications include airflow proving and filter status indication
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