Dwyer Instruments DHC-003 Pressure Switch
The Dwyer DHC-003 is a high-precision differential pressure controller designed for sensing and controlling low-pressure air and non-combustible gases. This unit features a sensing range of 0 to 0.5 inches water column, making it an essential component for monitoring filter status, duct static pressure, and fan proving in critical HVAC applications. Built with a solid-state sensor and an integrated SPDT relay, the DHC-003 delivers superior repeatability and reliability compared to traditional mechanical switches. The 3-digit LED display provides immediate local visual indication of process values, while the internal deadband adjustment allows technicians to fine-tune the setpoint to prevent short-cycling in turbulent airflow environments. The NEMA 4X (IP66) housing ensures the electronics remain protected in washdown or outdoor installations. Whether managing cleanroom pressurization or variable volume system (VAV) components, this controller provides the technical accuracy required for complex building automation integrations.
Key Benefits for Field Application- Digital Accuracy: Eliminates the drift and friction errors common in diaphragm-style mechanical switches, ensuring precise pressure setpoints.
- Versatile Mounting: Fits standard industry-standard cutouts and allows for easy surface or flush mounting in control panels.
- Enhanced Durability: The corrosion-resistant enclosure maintains 1% full-scale accuracy even in demanding commercial or industrial environments.
- Simplified Calibration: Field-programmable menu allows for quick field adjustments without removing the unit from the pneumatic tubing.
How do I reduce relay chatter in high-turbulence ducts?
Utilize the adjustable hysteresis (deadband) feature within the DHC-003 programming menu. Increasing the deadband ensures the relay stays engaged until the pressure drops significantly below the setpoint, protecting your blower motor starters.
Can this switch be used for liquid flow applications?
No, this unit is engineered specifically for air and non-combustible gases. For liquid media, a wet-to-wet differential pressure transmitter would be required to prevent damage to the internal sensing element.
What is the proper orientation for accurate sensing?
Unlike mechanical switches that are gravity-sensitive, the solid-state DHC series can be mounted in any orientation without affecting the differential pressure calibration.
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: $535.91
-65%$535.91
$187.57Dwyer Instruments DHC-003 Pressure Switch
The Dwyer DHC-003 is a high-precision differential pressure controller designed for sensing and controlling low-pressure air and non-combustible gases. This unit features a sensing range of 0 to 0.5 inches water column, making it an essential component for monitoring filter status, duct static pressure, and fan proving in critical HVAC applications. Built with a solid-state sensor and an integrated SPDT relay, the DHC-003 delivers superior repeatability and reliability compared to traditional mechanical switches. The 3-digit LED display provides immediate local visual indication of process values, while the internal deadband adjustment allows technicians to fine-tune the setpoint to prevent short-cycling in turbulent airflow environments. The NEMA 4X (IP66) housing ensures the electronics remain protected in washdown or outdoor installations. Whether managing cleanroom pressurization or variable volume system (VAV) components, this controller provides the technical accuracy required for complex building automation integrations.
Key Benefits for Field Application- Digital Accuracy: Eliminates the drift and friction errors common in diaphragm-style mechanical switches, ensuring precise pressure setpoints.
- Versatile Mounting: Fits standard industry-standard cutouts and allows for easy surface or flush mounting in control panels.
- Enhanced Durability: The corrosion-resistant enclosure maintains 1% full-scale accuracy even in demanding commercial or industrial environments.
- Simplified Calibration: Field-programmable menu allows for quick field adjustments without removing the unit from the pneumatic tubing.
How do I reduce relay chatter in high-turbulence ducts?
Utilize the adjustable hysteresis (deadband) feature within the DHC-003 programming menu. Increasing the deadband ensures the relay stays engaged until the pressure drops significantly below the setpoint, protecting your blower motor starters.
Can this switch be used for liquid flow applications?
No, this unit is engineered specifically for air and non-combustible gases. For liquid media, a wet-to-wet differential pressure transmitter would be required to prevent damage to the internal sensing element.
What is the proper orientation for accurate sensing?
Unlike mechanical switches that are gravity-sensitive, the solid-state DHC series can be mounted in any orientation without affecting the differential pressure calibration.
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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Description
The Dwyer DHC-003 is a high-precision differential pressure controller designed for sensing and controlling low-pressure air and non-combustible gases. This unit features a sensing range of 0 to 0.5 inches water column, making it an essential component for monitoring filter status, duct static pressure, and fan proving in critical HVAC applications. Built with a solid-state sensor and an integrated SPDT relay, the DHC-003 delivers superior repeatability and reliability compared to traditional mechanical switches. The 3-digit LED display provides immediate local visual indication of process values, while the internal deadband adjustment allows technicians to fine-tune the setpoint to prevent short-cycling in turbulent airflow environments. The NEMA 4X (IP66) housing ensures the electronics remain protected in washdown or outdoor installations. Whether managing cleanroom pressurization or variable volume system (VAV) components, this controller provides the technical accuracy required for complex building automation integrations.
Key Benefits for Field Application- Digital Accuracy: Eliminates the drift and friction errors common in diaphragm-style mechanical switches, ensuring precise pressure setpoints.
- Versatile Mounting: Fits standard industry-standard cutouts and allows for easy surface or flush mounting in control panels.
- Enhanced Durability: The corrosion-resistant enclosure maintains 1% full-scale accuracy even in demanding commercial or industrial environments.
- Simplified Calibration: Field-programmable menu allows for quick field adjustments without removing the unit from the pneumatic tubing.
How do I reduce relay chatter in high-turbulence ducts?
Utilize the adjustable hysteresis (deadband) feature within the DHC-003 programming menu. Increasing the deadband ensures the relay stays engaged until the pressure drops significantly below the setpoint, protecting your blower motor starters.
Can this switch be used for liquid flow applications?
No, this unit is engineered specifically for air and non-combustible gases. For liquid media, a wet-to-wet differential pressure transmitter would be required to prevent damage to the internal sensing element.
What is the proper orientation for accurate sensing?
Unlike mechanical switches that are gravity-sensitive, the solid-state DHC series can be mounted in any orientation without affecting the differential pressure calibration.
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.
