A-491

Overview

The Dwyer Instruments A-491 is a 6-inch straight stainless steel static pressure tip designed for accurate airflow monitoring. It features a mounting flange with an integral 1/4-inch hose barb, allowing direct connection to differential pressure switches, transmitters, manometers, and Magnehelic gages. The unit provides a 6-inch insertion depth for measuring static pressures within ducts or rooms.

Feature Summary

• Constructed from stainless steel for durability in static pressure measurement applications
• Includes a mounting flange with an integral 1/4-inch hose barb for secure tubing attachment
• Features a 6-inch straight design for consistent insertion depth into ductwork

Applications

• Measuring static pressures in HVAC ducts
• Monitoring room static pressures
• Connecting to differential pressure switches and transmitters
• Integration with manometers and Magnehelic gages

Procurement Notes

Verify the specific configuration matches the required insertion depth and tubing size. Confirm the presence of the mounting flange and 1/4-inch hose barb as standard for this part number. Ensure compatibility with existing manifold systems before procurement.

Selection Notes

Select this model when a fixed 6-inch insertion depth is required for static pressure sampling. The integrated flange simplifies installation compared to bare probes. Ensure the connected instrumentation supports the 1/4-inch hose barb interface for proper sealing and connection.

Part Context

This component belongs to the Dwyer Static Pressure Tips series. It serves as a specialized probe for air handling systems, distinct from general-purpose pressure sensors by its mechanical design for duct penetration and direct gauge connection.

Replacement Considerations

Check for compatible static pressure tips with identical 6-inch length and 1/4-inch barb specifications. Verify that substitute models include a mounting flange if wall or duct surface mounting is required.