Dwyer Instruments A-303 Pressure Tip

The Dwyer Instruments A-303 Pressure Tip is an essential diagnostic component for HVACR professionals requiring precision static pressure measurement in ductwork and air handling systems. Engineered with a 4-inch insertion depth, this portable static pressure tip is optimized to bypass boundary layer turbulence, ensuring accurate readings from the core of the airstream. The probe features four radially drilled .040-inch sensing holes, a design specifically intended to minimize the effects of air velocity and impingement, providing reliable data for HVAC system balancing and performance verification.

This magnetic static pressure tip includes an integrated high-strength magnet, allowing for hands-free operation during field diagnostics. It is fully compatible with 3/16" I.D. rubber or plastic tubing, facilitating a secure connection to manometers, Magnehelic gauges, and differential pressure switches. Whether you are conducting a static pressure drop test across industrial air filters, evaporative coils, or monitoring blower discharge pressures, the A-303 provides the consistency required for high-stakes technical troubleshooting and system commissioning.

• Enhanced Accuracy: Radially drilled sensing ports eliminate velocity pressure errors for true static readings.
• Magnetic Stability: Integrated magnet secures the tip to metal ductwork, freeing up your hands for gauge adjustment.
• Broad Compatibility: Standard 3/16" barb fits most HVAC test hoses and portable digital manometers.
• Durable Construction: Built to withstand the rigors of service bag storage and frequent field use in light commercial and residential environments.

What size duct hole is required for insertion?
Technicians typically use a 3/8" or 1/2" hole to accommodate the 4-inch angled probe effectively.

Can this be used for permanent monitoring?
While the A-303 is designed for portability due to its magnetic mount, it can be utilized in semi-permanent setups; however, the A-301 or A-302 series are preferred for fixed bolt-on installations.

Is the tip sensitive to high air velocities?
It is rated for accurate sensing in smooth airflow up to 1,500 FPM, making it ideal for standard commercial duct velocities.

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.