Cleveland Controls 21122-112 Pressure Probe

The Cleveland Controls 21122-112 is a professional-grade impact pressure probe specifically engineered for high-accuracy air velocity monitoring and fan proofing in HVACR systems. Featuring a 6-inch insertion depth, this total pressure probe is designed for duct mounting to provide reliable input signals for air pressure sensing switches and differential pressure transmitters. The aluminum tube construction ensures long-term durability in high-cycle environments, while the integrated barb fitting simplifies installation by securely accepting 1/8" to 1/4" ID flexible tubing without the need for additional adapters.

For technicians installing this component, the probe uses an angle-cut tip that must be positioned directly into the air stream for total pressure measurement or facing away for vacuum applications. The 4-hole 1.5-inch mounting flange provides a stable, leak-free seat on the duct surface, maintaining the 3/16-inch probe diameter at the optimal perpendicular angle for laminar flow sensing. Whether you are proving draft in gas-fired furnaces or monitoring airflow status across coils and filters, this 21122-112 probe delivers the consistent pneumatic signal required for precise setpoint actuation in industrial and commercial ventilation controls.

• Optimized 6" Reach: Extended insertion length allows for accurate sensing in larger ductwork or beyond the boundary layer for a true total pressure reading.
• Universal Compatibility: Seamlessly integrates with Cleveland Controls AFS series switches and other major brands using standard 1/4" barb connections.
• Rugged Aluminum Build: Corrosion-resistant probe body stands up to harsh AHU environments and combustion by-products.
• Simple 4-Hole Mounting: Pre-drilled flange ensures a secure, vibration-resistant installation for critical safety and proving circuits.

Is this used for static or total pressure?
The 21122-112 is an impact probe designed for total pressure (velocity + static). The angle-cut tip distinguishes it from aspiration probes used strictly for static readings.

What size tubing should I use?
The barbed end is designed to fit standard 1/8" to 1/4" ID flexible vinyl or silicone tubing, ensuring a tight seal for low-pressure pneumatic signals.

Where should the probe be positioned in the duct?
For the most accurate airflow sensing, install the probe at least 5 to 8 duct diameters downstream from elbows or obstructions to ensure a stable, non-turbulent reading.

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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.