United Electric H105K-457-9942 Differential Pressure Switch

0–30 PSID | NEMA 4X | Industrial HVAC & Process Control

Product Overview

The United Electric H105K-457-9942 differential pressure switch is a rugged, industrial-grade device designed for precise monitoring and control of pressure differences in HVAC systems, air handling units, and process applications.

Built as part of UE’s trusted H105K Series, this switch delivers reliable performance in demanding environments, offering accurate pressure detection for safety shutdowns, filter monitoring, and airflow verification.

🔧 Key Features

• Differential Pressure Monitoring (0–30 PSID) – Ideal for airflow and system pressure control
• Adjustable Setpoint (3–30 PSID) – Field-adjustable for flexible applications
• NEMA 4X Enclosure – Corrosion-resistant, suitable for harsh environments
• SPDT Switching Output – Reliable control signaling
• Heavy-Duty Electrical Rating – Up to 15A, 480VAC
• Industrial-Grade Construction – Built for long-term reliability in demanding systems

⚙️ Technical Specifications

• Manufacturer: United Electric Controls
• Model: H105K-457
• Part Number: 9942
• Device Type: Differential Pressure Switch
• Pressure Range: 0–30 PSID
• Adjustable Setpoint Range: 3–30 PSID
• Deadband: 0.05–0.3 PSI (fixed)
• Proof Pressure: 225 PSI
• Working Pressure: Vacuum to 225 PSI
• Electrical Rating: Up to 15A @ 480VAC
• Switch Type: SPDT
• Process Connection: 1/4" NPT (dual ports)
• Diaphragm Material: Buna-N
• Enclosure Rating: NEMA 4X (weatherproof / corrosion-resistant)
• Country of Manufacture: USA

🏭 Typical Applications

• HVAC airflow proving
• Filter monitoring (dirty filter detection)
• Fan and blower status verification
• Duct pressure monitoring
• Industrial process control systems
• Safety interlocks and shutdown systems

✅ Benefits

• Prevents system damage by detecting pressure loss or imbalance
• Improves HVAC system efficiency and safety
• Reliable switching in harsh or outdoor environments
• Long service life with minimal maintenance