Description
The United Electric J21K-150 differential pressure switch is a versatile, field-adjustable control designed for monitoring pressure differences in HVAC, filtration, and industrial process systems. With an adjustable differential range of 0 to 40 PSI, this switch provides dependable performance for applications such as filter condition monitoring, flow verification, and system protection. The SPDT (single-pole, double-throw) contact configuration allows for flexible wiring of normally open and normally closed circuits. Housed in a NEMA 4-rated enclosure, the J21K-150 offers protection against water and dust, making it suitable for use in both indoor and outdoor environments.
Key Features
- Adjustable differential pressure range: 0–40 PSI
- SPDT switch configuration for flexible control wiring
- NEMA 4 enclosure for water-resistant and dust-tight protection
- Designed for HVAC, filtration, and industrial applications
- Durable construction for reliable, long-term operation
- Ideal for filter monitoring, flow verification, and system protection
- Suitable for indoor and outdoor installation environments
