United Electric J402-442 Pressure Switch 0-20 WC 0-49.8 mbar

Description:

The United Electric Controls J402-442 Pressure Switch is used in low-pressure industrial process control, HVAC systems, air handling equipment, filtration systems, and ventilation applications to monitor pressure and provide automatic electrical switching when preset pressure conditions are reached. Commonly installed in air handling units, clean rooms, dust collection systems, filter monitoring assemblies, and industrial automation equipment requiring precise low-pressure monitoring. Maintenance teams and system integrators use this part for repair, retrofit, expansion, or replacement of existing pressure sensing and control systems.

Applications:

The United Electric Controls J402-442 Pressure Switch is commonly used in airflow proving systems, filter monitoring equipment, HVAC control circuits, ventilation systems, clean room pressure monitoring, and industrial process installations. The switch converts pressure changes into electrical switching actions for alarms, shutdown functions, maintenance indication, and automatic equipment control, helping maintain safe and efficient operation of critical low-pressure systems.

Technical Specifications:

• Brand: United Electric Controls
• Part Number: J402-442
• Product Type: Pressure Switch
• Series: 400 Series
• Switch Type: Low-Pressure Switch
• Pressure Range: 0 to 20 in. WC (Water Column)
• Pressure Range Metric: 0 to 49.8 mbar
• Function: Pressure Monitoring and Control
• Pressure Sensing Element: Diaphragm Actuated Mechanism
• Output Contacts: Dual SPDT Snap-Action Switches
• Electrical Rating: 15A @ 125/250/480 VAC Resistive
• Setpoint Adjustment: External Reference Dial
• Repeatability: Industrial Process Control Accuracy
• Enclosure Type: NEMA 4X Weatherproof Housing
• Housing Material: Epoxy-Coated Die-Cast Aluminum
• Process Connection: Low-Pressure Port Connection
• Suitable for Air and Compatible Non-Corrosive Gases
• Designed for Alarm and Shutdown Applications
• Compatible with HVAC, Filtration, and Ventilation Equipment
• Intended for OEM Equipment and Replacement Installations
• Suitable for Maintenance, Retrofit, and Repair Projects
• Engineered for Continuous-Duty Industrial Service

Common Replacements:

• United Electric Controls J402-156 Pressure Controller
• United Electric Controls J21KX-140 Differential Pressure Switch
• United Electric Controls J21KX-S150 Differential Pressure Switch