Description
The United Electric H400K-456-M540 differential pressure switch is a rugged, field-adjustable control designed for monitoring pressure differences in HVAC, fluid handling, and industrial process systems. Built with a Viton diaphragm, this switch is well-suited for applications involving aggressive media or elevated temperatures where enhanced chemical resistance is required. The SPDT (single-pole, double-throw) contact configuration provides flexible control of normally open and normally closed circuits. Housed in a NEMA 4X-rated enclosure, the switch offers protection against water, dust, and corrosion, making it ideal for harsh or washdown environments. This model is commonly used for filter monitoring, flow verification, and system protection.
Key Features
- Differential pressure switch with adjustable setpoint (range varies by configuration)
- SPDT switch configuration for flexible control wiring
- Viton diaphragm for enhanced chemical and temperature resistance
- NEMA 4X enclosure for corrosion-resistant, watertight protection
- Designed for HVAC, fluid systems, and industrial applications
- Durable construction for reliable long-term performance
- Ideal for filter monitoring, flow verification, and system protection
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