Cleveland Controls DFS-301 Air Flow Pressure Switch

The Cleveland Controls DFS-301 is a dependable air flow pressure switch engineered for use in commercial and residential HVAC applications. Designed to detect the presence or absence of airflow within duct systems, the DFS-301 provides a critical safety and control function — helping to protect equipment, ensure proper system sequencing, and verify fan or blower operation before allowing downstream processes to proceed.

Key Features

• Detects airflow presence or absence in HVAC duct systems
• Provides reliable switching action for fan/blower verification
• Compact, low-profile design for easy installation in tight spaces
• Suitable for use in commercial and residential HVAC applications
• Supports system safety interlocking and equipment protection
• Durable construction for long service life in demanding environments

Typical Applications

• Air handling units (AHUs)
• Fan coil units
• Rooftop units (RTUs)
• Furnaces and forced-air systems
• Duct pressure monitoring and control circuits

Why Choose the Cleveland Controls DFS-301?

Cleveland Controls has a long-standing reputation for producing high-quality pressure and flow sensing devices trusted by HVAC professionals across North America. The DFS-301 continues that tradition, offering straightforward installation, consistent performance, and compatibility with a wide range of HVAC control systems. Whether you’re commissioning a new installation or replacing an aging switch, the DFS-301 delivers the reliability you need to keep systems running safely and efficiently.