United Electric H400K-456 Pressure Switch

The United Electric H400K-456 Pressure Switch is a high-performance differential pressure switch designed for critical monitoring in industrial gas production, energy generation, and water treatment systems. This rugged, field-adjustable control features a setpoint range of 2 to 20 PSID (+/- 2 to 20" WC depending on calibration), providing precise threshold protection. Engineered with a durable Buna-N diaphragm and an aluminum pressure connection, it ensures compatibility with a wide range of gases and liquids. The unit utilizes a SPDT switch configuration rated at 15A, allowing for seamless integration into both normally open and normally closed circuits. As a direct replacement for the legacy H105K-456, the H400K-456 moves the reference dial to an internal position for enhanced security against unauthorized adjustments. Housed in a heavy-duty NEMA 4X enclosure, this switch provides watertight and dust-tight protection, making it a reliable choice for washdown environments and demanding outdoor installations.

• Versatile Application Range: Ideal for filter monitoring, flow verification, and pump protection with an adjustable 2-20 PSI differential.
• Enhanced Enclosure Protection: The epoxy-coated aluminum NEMA 4X enclosure resists corrosion and environment-related wear.
• Internal Reference Dial: Supports secure setpoint calibration while protecting the adjustment mechanism from tampering.
• Standard Industrial Mounting: Features 1/4" FNPT pressure connections and 3/4" NPT electrical conduit entries for rapid field installation.
• Proven Replacement Path: Functions as a drop-in H105K-456 replacement, maintaining the same footprint and performance specs.

• What is the difference between the H400K-456 and H105K-456? The H400K-456 is the updated version where the reference dial is located internally for added security, whereas the H105K utilized an external dial.
• Can this switch be used in washdown environments? Yes, the NEMA 4X rating ensures the unit is protected against water ingress and corrosion in harsh conditions.
• What media is compatible with the Buna-N diaphragm? It is suitable for most non-corrosive gases and liquids; always verify chemical compatibility based on your specific process media.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.