Dwyer Instruments 1920-0 Pressure Switch
The Dwyer 1920-0 Pressure Switch is a high-precision differential pressure switch designed for critical HVAC and industrial process monitoring. Engineered for low-pressure applications, this unit features an adjustable set point range of .15" to .55" w.c. with a deadband of approximately 0.10" w.c. Its SPDT switch configuration allows for versatile wiring as either normally open or normally closed, making it a reliable choice for fan status monitoring, filter blockage detection, and combustion air proving. The diaphragm-operated design ensures a 45" w.c. continuous pressure limit while maintaining accuracy with air and non-combustible gases. This specific model includes a conduit connection and an HP back port for simplified installation in tight plenum spaces. Built for long-term field stability, the 1920-0 eliminates nuisance tripping in building automation systems and variable air volume (VAV) controls by responding precisely to minute pressure differentials.
Key Benefits for Technicians- Field Adjustable Range: Fine-tune set points from .15" to .55" w.c. to match specific system design requirements.
- High Overpressure Rating: The 45" w.c. limit protects the internal diaphragm from surges during system startup or testing.
- Versatile Mounting: Compact footprint with specific conduit and HP back port layout facilitates quick integration into standard HVAC cabinetry.
- Industrial Durability: Robust construction suited for air pressure sensing in commercial environments without frequent recalibration.
How do I adjust the set point on a Dwyer 1920 series switch?
Access the adjustment screw located inside the conduit enclosure. Increasing the spring tension raises the set point. Use a calibrated manometer to verify the exact trip point under flow conditions.
Can the 1920-0 handle vertical and horizontal mounting?
For maximum accuracy at the lower end of the .15" w.c. range, the switch should be mounted with the diaphragm in a vertical plane. Horizontal mounting may shift the set point due to the weight of the diaphragm.
Is this switch compatible with corrosive gases?
No, this model is specifically rated for air and non-combustible, non-corrosive gases. Exposure to aggressive chemicals will degrade the silicone diaphragm.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $119.79
-65%$119.79
$41.93Dwyer Instruments 1920-0 Pressure Switch
The Dwyer 1920-0 Pressure Switch is a high-precision differential pressure switch designed for critical HVAC and industrial process monitoring. Engineered for low-pressure applications, this unit features an adjustable set point range of .15" to .55" w.c. with a deadband of approximately 0.10" w.c. Its SPDT switch configuration allows for versatile wiring as either normally open or normally closed, making it a reliable choice for fan status monitoring, filter blockage detection, and combustion air proving. The diaphragm-operated design ensures a 45" w.c. continuous pressure limit while maintaining accuracy with air and non-combustible gases. This specific model includes a conduit connection and an HP back port for simplified installation in tight plenum spaces. Built for long-term field stability, the 1920-0 eliminates nuisance tripping in building automation systems and variable air volume (VAV) controls by responding precisely to minute pressure differentials.
Key Benefits for Technicians- Field Adjustable Range: Fine-tune set points from .15" to .55" w.c. to match specific system design requirements.
- High Overpressure Rating: The 45" w.c. limit protects the internal diaphragm from surges during system startup or testing.
- Versatile Mounting: Compact footprint with specific conduit and HP back port layout facilitates quick integration into standard HVAC cabinetry.
- Industrial Durability: Robust construction suited for air pressure sensing in commercial environments without frequent recalibration.
How do I adjust the set point on a Dwyer 1920 series switch?
Access the adjustment screw located inside the conduit enclosure. Increasing the spring tension raises the set point. Use a calibrated manometer to verify the exact trip point under flow conditions.
Can the 1920-0 handle vertical and horizontal mounting?
For maximum accuracy at the lower end of the .15" w.c. range, the switch should be mounted with the diaphragm in a vertical plane. Horizontal mounting may shift the set point due to the weight of the diaphragm.
Is this switch compatible with corrosive gases?
No, this model is specifically rated for air and non-combustible, non-corrosive gases. Exposure to aggressive chemicals will degrade the silicone diaphragm.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Product Information
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Shipping & Returns
Description
The Dwyer 1920-0 Pressure Switch is a high-precision differential pressure switch designed for critical HVAC and industrial process monitoring. Engineered for low-pressure applications, this unit features an adjustable set point range of .15" to .55" w.c. with a deadband of approximately 0.10" w.c. Its SPDT switch configuration allows for versatile wiring as either normally open or normally closed, making it a reliable choice for fan status monitoring, filter blockage detection, and combustion air proving. The diaphragm-operated design ensures a 45" w.c. continuous pressure limit while maintaining accuracy with air and non-combustible gases. This specific model includes a conduit connection and an HP back port for simplified installation in tight plenum spaces. Built for long-term field stability, the 1920-0 eliminates nuisance tripping in building automation systems and variable air volume (VAV) controls by responding precisely to minute pressure differentials.
Key Benefits for Technicians- Field Adjustable Range: Fine-tune set points from .15" to .55" w.c. to match specific system design requirements.
- High Overpressure Rating: The 45" w.c. limit protects the internal diaphragm from surges during system startup or testing.
- Versatile Mounting: Compact footprint with specific conduit and HP back port layout facilitates quick integration into standard HVAC cabinetry.
- Industrial Durability: Robust construction suited for air pressure sensing in commercial environments without frequent recalibration.
How do I adjust the set point on a Dwyer 1920 series switch?
Access the adjustment screw located inside the conduit enclosure. Increasing the spring tension raises the set point. Use a calibrated manometer to verify the exact trip point under flow conditions.
Can the 1920-0 handle vertical and horizontal mounting?
For maximum accuracy at the lower end of the .15" w.c. range, the switch should be mounted with the diaphragm in a vertical plane. Horizontal mounting may shift the set point due to the weight of the diaphragm.
Is this switch compatible with corrosive gases?
No, this model is specifically rated for air and non-combustible, non-corrosive gases. Exposure to aggressive chemicals will degrade the silicone diaphragm.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
