QPL15.500 Siemens Pressure Switch

Overview

The Siemens QPL15.500 is a compact, automatic reset pressure switch designed for monitoring gas or air pressures in industrial and commercial combustion systems. It is engineered to detect when pressure either falls below or exceeds a predefined setpoint, triggering an electrical circuit change to ensure system safety. This CE-approved device is specifically built for integration by OEMs into gas trains of gas-fired equipment, such as burners and boilers, providing reliable supervision for continuous operation.

Features

• Automatic reset functionality for seamless pressure monitoring
• Compact design suitable for space-constrained installations
• O-ring connection type for secure and leak-proof mounting
• Adjustable switching point via an integrated setting knob
• Durable construction suited for use with gas families I, II, and III
• High protection rating of IP54 for resilience in industrial environments

Specifications

• Model: QPL15.500
• Pressure Range: 100 to 500 mbar (10 to 50 kPa)
• Max Operating Pressure: 69 kPa (continuously)
• Switching Voltage: Max 280 V AC / 24 to 48 V DC
• Switching Current: Max 6 A (resistive)
• Connection Type: O-ring
• Operating Temperature: -15 C to +60 C
• Weight: Approximately 120 g
• Safety Class: II to VDE 0631

Applications

• Supervision of air or gas pressures in gas trains for burners
• Functioning as a minimum or maximum pressure monitor in HVAC systems
• Integration into gas-fired equipment and industrial boilers
• Monitoring of neutral gaseous media in commercial heating applications