Precision in VAV Systems Relies on Differential Pressure Transmitters

Building managers and HVAC professionals often face persistent challenges with variable air volume (VAV) systems. Despite significant investments, achieving accurate airflow control remains elusive, leading to energy waste and comfort issues. The solution may lie in one critical component: the differential pressure transmitter.

Differential pressure transmitters serve as the "airflow scouts" of VAV systems. These devices measure the pressure difference across VAV terminal devices (such as VAV boxes) to determine airflow volume. The DPT-2015 differential pressure transmitter from Johnson Controls converts this pressure differential into precise voltage signals for VAV controllers.

VAV controllers translate these signals into standard airflow measurements (typically cubic feet per minute) and adjust damper positions accordingly. The accuracy and stability of the pressure transmitter directly determine the system's overall performance.

• Precision Engineering: Utilizing advanced capacitive sensor technology, the DPT-2015 delivers exceptional long-term stability and measurement accuracy, ensuring reliable airflow data for optimal control decisions.
• Simplified Installation: The device requires only basic zero-point calibration, typically performed through the VAV controller, significantly reducing setup time and maintenance requirements for large-scale installations.
• Versatile Range Options: With two pressure range selections (0-1.5" WC and 0.5-4.5" WC), the transmitter accommodates diverse VAV terminal requirements and broader HVAC control applications.
• Immediate Operation: The instant-start capability eliminates warm-up periods, allowing immediate system commissioning and airflow control after installation.
• Maintenance-Friendly Design: The integrated pressure transmitter features a dead-end input port design that eliminates the need for additional inline filters, minimizing contamination risks and long-term maintenance.
• Flexible Mounting Options: The transmitter supports standalone installation or integration with M9104/M9106 actuators and Johnson Controls VAV controllers, providing adaptable solutions for various system configurations.
• Backward Compatibility: The 4VDC output range allows seamless replacement of DPT-200-2 transmitters in legacy systems.

• Commercial Buildings: Offices, retail spaces, and hotels benefit from precise airflow regulation that balances comfort with energy efficiency.
• Healthcare Facilities: Hospitals and laboratories require strict air quality control, where the transmitter's reliability ensures compliance with stringent ventilation standards.
• Industrial Settings: Manufacturing plants utilize the device's accurate measurements to maintain safe airborne contaminant levels through dynamic ventilation adjustments.

• Range Capacity: Ensure the selected range covers all operational pressure differentials without compromising measurement resolution.
• Measurement Accuracy: Higher precision directly translates to better airflow control performance.
• Long-Term Stability: Devices with minimal drift reduce calibration frequency and maintenance costs.
• Response Characteristics: Faster response times improve system reactivity to changing ventilation demands.
• Installation Requirements: Verify compatibility with existing system components and mounting configurations.
• Environmental Protection: Select appropriate ingress protection ratings for the installation environment.

Professional consultation with HVAC engineers is recommended to assess specific application requirements and identify optimal solutions. The proper selection of differential pressure transmitters represents a fundamental step in achieving efficient VAV system operation.