Description
The United Electric J21K-S150B differential pressure switch is a field-adjustable control designed for monitoring pressure differences in HVAC, filtration, and industrial process systems. Built for reliable performance, this switch is commonly used for applications such as filter monitoring, airflow verification, and system protection. The SPDT (single-pole, double-throw) contact configuration provides flexible wiring for both normally open and normally closed circuits. Housed in a NEMA 4-rated enclosure, the J21K-S150B offers protection against water and dust, making it suitable for demanding indoor and outdoor environments.
Key Features
- Differential pressure switch with field-adjustable setpoint (range varies by configuration)
- SPDT switch configuration for flexible control wiring
- NEMA 4 enclosure for water-resistant and dust-tight protection
- Designed for HVAC, filtration, and industrial applications
- Suitable for filter monitoring, airflow verification, and system protection
- Durable construction for reliable long-term operation
- Ideal for indoor and outdoor installation environments
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