Description
Dwyer 1627-1 Dual-Switch Pressure Switch Overview
The Dwyer 1627-1 is a precision-engineered pressure switch designed for reliable monitoring and control in HVAC, building automation, and industrial applications. Featuring two independent SPDT (Single-Pole, Double-Throw) switching elements, this unit provides versatile control logic in a single compact housing — ideal for applications requiring dual set-point monitoring or redundant switching.
Key Features
- Two independent SPDT switches for flexible control configurations
- Operating pressure range: 0.15″ w.c. to 1.5″ w.c. — ideal for low-differential pressure sensing
- Adjustable deadband setting: 0.10″ w.c. to 0.20″ w.c. for precise switching hysteresis
- 0.5″ w.c. adjustable differential between set points for dual-level control
- Compatible with air and non-combustible gases
- 1/8″ Female NPT process connection for easy inline installation
- Compact, durable construction suited for commercial and light industrial HVAC environments
Technical Specifications
- Model: 1627-1
- Switch Type: 2 SPDT
- Operating Pressure Range: 0.15″ w.c. to 1.5″ w.c.
- Deadband Setting: 0.10″ – 0.20″ w.c.
- Adjustable Differential Between Set Points: 0.5″ w.c.
- Media: Air and Non-Combustible Gases
- Process Connection: 1/8″ Female NPT
Typical Applications
- Air handling unit (AHU) filter status monitoring
- Fan proving and airflow verification
- Duct static pressure control
- Building automation and DDC system integration
- HVAC equipment protection and alarm circuits
Why Choose the Dwyer 1627-1?
Dwyer Instruments is a trusted name in pressure measurement and control. The 1627-1 delivers dependable dual-switch performance in a low-pressure range that is critical for air-side HVAC applications. The adjustable deadband and differential between set points give technicians the flexibility needed to fine-tune system response, reduce nuisance trips, and protect equipment effectively.
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