Description
Dwyer 1911-00 Low Differential Pressure Switch Overview
The Dwyer 1911-00 is a precision low differential pressure switch engineered for reliable performance in HVAC, building automation, and industrial air-handling applications. Designed to detect very small changes in pressure, this switch is ideal for monitoring air filters, fan operation, duct static pressure, and similar low-pressure systems.
Key Specifications
- Set Point Range: .07″ w.c. to .15″ w.c.
- Approximate Deadband: 0.04″ w.c.
- Switch Type: SPDT (Single Pole, Double Throw)
- Compatible Media: Air or non-combustible gases
- Continuous Pressure Limit: 45″ w.c.
- Conduit: Without conduit
Features & Benefits
- Ultra-low differential pressure sensing range for precise detection in critical air systems
- SPDT switching provides both normally open and normally closed circuit options for flexible wiring configurations
- Rated for air and non-combustible gases, making it suitable for a wide range of HVAC and ventilation applications
- 45″ w.c. continuous pressure limit ensures durability against pressure surges without damage to the switch
- Compact, field-proven design from Dwyer Instruments — a trusted name in pressure measurement and control
- Without conduit configuration allows for flexible installation in various enclosure types
Typical Applications
- Air filter status monitoring (dirty filter detection)
- Fan and blower proof-of-operation
- Duct static pressure control
- Clean room and laboratory pressure monitoring
- HVAC air handling unit controls
Why Choose the Dwyer 1911-00?
Dwyer’s Series 1910 pressure switches are built to deliver consistent, repeatable performance in demanding environments. The 1911-00 model’s extremely low set point range makes it the go-to choice when standard pressure switches lack the sensitivity needed for low-pressure air systems. Its SPDT output and robust continuous pressure rating give installers the versatility and confidence required for professional HVAC installations.
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