PAFS-1003

Overview

The Dwyer Instruments PAFS-1003 is an averaging flow sensor designed for measuring air and compatible gases. It features a lightweight construction with two sensing points to ensure accurate velocity pressure measurement. The unit has an insertion length of 5-13/32 inches (13.73 cm) and utilizes a ¼ inch internal diameter process connection. Operating temperature limits range from 40°F to 120°F (4°C to 49°C), while storage temperatures extend from -40°F to 140°F (-40°C to 60°C).

Feature Summary

• Dual sensing points provide averaged flow data for improved accuracy in ductwork applications.
• Lightweight design facilitates easy installation and handling within HVAC systems.
• Integrated averaging tube structure ensures representative velocity pressure readings.

Applications

• Variable Air Volume (VAV) terminal units inlet sections
• HVAC system ductwork monitoring
• Air flow stations and switches

Procurement Notes

Verify the specific model suffix against official Dwyer documentation to confirm exact insertion length and connection specifications. Ensure the application medium is strictly air or compatible gases, as the sensor is not rated for other fluids. Confirm operating temperature requirements fall within the specified 40°F to 120°F range before procurement. Check for RoHS compliance status if required by project specifications.

Selection Notes

Select this model when precise averaging of airflow is required in ductwork environments. The dual-sensing point design offers better accuracy than single-point sensors. Consider the 5-13/32 inch insertion length for compatibility with standard duct sizes. Ensure the gas type is compatible with the sensor materials. This sensor is suitable for VAV terminals where consistent flow monitoring is critical.

Part Context

The PAFS-1003 belongs to the PAFS-1000 series of averaging flow sensors manufactured by Dwyer Instruments. This series is engineered specifically for HVAC applications requiring reliable airflow measurement. The product line focuses on providing accurate differential pressure sensing in air streams. Dwyer Instruments specializes in instrumentation for pressure, temperature, and flow measurement.

Replacement Considerations

Consult official Dwyer cross-reference guides for direct replacements. Verify that any substitute part matches the 5-13/32 inch insertion length and dual-sensing configuration. Ensure the replacement supports the same ¼ inch ID process connection. Confirm compatibility with the intended HVAC application environment.