MAMAC Systems A-520-2-A-1 Pressure Probe

For veteran technicians and contractors requiring clinical accuracy in air handling systems, the MAMAC Systems A-520-2-A-1 Static Pressure Probe is a field-proven 8-inch pick-up engineered for long-term reliability. Precision-machined from 6061T-6 aluminum alloy, this probe is built to monitor static pressure in demanding duct, plenum, and air handler environments without the drift common in plastic alternatives. It features a technical dual-orifice design where sensing ports are positioned diametrically opposite in a vertical plane; this specific geometry cancels out airflow-induced velocity errors, ensuring stable and repeatable pressure readings even in high-velocity airstreams. The integrated neoprene gasket and 1.5-inch mounting flange create an airtight seal against sheet metal, while the 1/4-inch brass hose barb connection provides a secure, leak-free transition to PVC or copper tubing. With a temperature rating up to 482°F (250°C), this A-520 series probe is a resilient solution for commercial balancing and VAV system optimization.

Key Benefits for the Field:

• Velocity Error Cancellation: The dual orifice static sensor design utilizes the Fechheimer derivative to negate suction effects, providing a pure static pressure value regardless of duct velocity.
• Industrial Build Quality: Constructed from high-grade 6061T-6 aluminum to resist corrosion and structural fatigue in commercial HVAC environments.
• High-Heat Resilience: Rated for operating temperatures up to 482°F (250°C), suitable for extreme air handling applications.
• Streamlined Installation: Features a gasketed mounting flange with pre-drilled holes, designed to significantly reduce labor time during duct deployment.
• Integrity-First Design: The tamper-proof sensing cavity is engineered so it cannot be obstructed or taped over, ensuring data reliability for critical building automation systems.

Common Contractor Questions:

How does the dual-orifice design improve accuracy over single-port probes?
Standard single-orifice probes often experience a low-pressure suction effect as air flows across the opening, creating an error that increases exponentially with air velocity. The MAMAC A-520 uses two opposing orifices; the suction on one is cancelled by the equal and opposite pressure drop on the other, delivering a stable reading across different CFM ranges.

What size hole is required for duct installation?
For the most efficient installation, a 3/8-inch hole should be drilled in the sheet metal to accommodate the 8-inch aluminum probe. Use the flange as a template to secure the assembly with self-tapping screws.

Can this probe be used in corrosive exhaust environments?
While the 6061T-6 aluminum alloy offers excellent resistance for standard HVAC and air handling applications, 304 stainless steel variants are typically recommended for specific industrial exhaust streams where highly corrosive gases are present.

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.