PAFS-1004

Overview

The Dwyer Instruments PAFS-1004 is an averaging flow sensor designed for measuring differential pressure in air volume terminal units and ducts. It features a length of 7 21/32 inches (approximately 19.55 cm) and utilizes ABS and polycarbonate materials. The device supports connection sizes of 1/4 inch and 3/8 inch with push-on connection types. It operates at a maximum media temperature of 120 degrees Fahrenheit and has a K factor of 1.46.

Feature Summary

• Designed for sensing velocity pressure in the inlet section of variable air volume terminal units
• Utilizes averaging technology to measure differential pressure accurately
• Constructed from durable ABS and polycarbonate materials

Applications

• Variable air volume (VAV) terminal unit inlet sections
• Fan systems requiring velocity pressure sensing
• Duct airflow measurement applications

Procurement Notes

Verify the specific application requirements against the maximum media temperature limit of 120°F and ensure compatibility with the 1/4 inch or 3/8 inch push-on connection types. Confirm that the installation environment involves air or compatible gases, as specified for this series. Cross-reference the K factor of 1.46 with system calculation needs to ensure accurate flow measurement integration.

Selection Notes

Select the PAFS-1004 when precise differential pressure sensing is required in VAV terminal units. Consider the physical dimensions of 7 21/32 inches for insertion depth compatibility. Evaluate the material composition of ABS and polycarbonate for environmental resistance. Ensure the operating temperature does not exceed 120°F and that the connection type matches the existing system infrastructure.

Part Context

The PAFS-1004 belongs to the Series PAFS-1000 Averaging Flow Sensor line by Dwyer Instruments. This series is engineered specifically for HVAC applications, focusing on reliable airflow monitoring through differential pressure measurement. The product represents a specialized solution for integrating flow data into building management systems without complex instrumentation.

Replacement Considerations

Consult official Dwyer documentation for direct substitutes within the PAFS-1000 series. Verify dimensional compatibility and K factor specifications before replacing existing sensors to maintain measurement accuracy.