Schneider Electric (Barber Colman) 2323-503 Pressure Transmitter

The Schneider Electric 2323-503 Pressure Transmitter is a precision pneumatic differential pressure sensor engineered for low-pressure HVAC automation and VAV box control. This Barber Colman legacy series transmitter provides a linear 3 to 15 psi pneumatic signal proportional to the sensed static pressure or differential pressure, operating within a bipolar range of -0.5 to +0.5 inches Water Column (W.C.). Designed for high-reliability air-handling systems, it features a low 29 scim air consumption rate, ensuring minimal impact on the main pneumatic header. The unit utilizes specialized porting, requiring 1/4 inch O.D. tubing for standard connections, while the dedicated HI and LO sensing ports are sized for 3/8 inch O.D. tubing to maintain signaling integrity. This industrial pressure transducer is essential for precise duct static pressure monitoring and airflow measurement in commercial pneumatic control loops.

Key Benefits for Technicians

• High Sensitivity: The 1.0 inch W.C. total span allows for granular control in low-velocity airflow applications.
• Standardized Integration: Output signal integrates seamlessly into existing 3-15 psi pneumatic control sequences.
• Reduced Energy Waste: Low scim consumption prevents unnecessary compressor cycling in large-scale pneumatic architectures.
• Durable Construction: Built for long-term stability in mechanical rooms and plenum environments.

Common Questions & Technical Support

How do I calibrate the zero point on the 2323-503?
Zero adjustment should be performed with both HI and LO ports open to atmosphere. Verify the output signal is exactly 9 psi (the midpoint of the 3-15 psi range) given the -0.5 to +0.5" W.C. span.

Why does this transmitter require different tubing sizes?
The use of 3/8" O.D. tubing on the sensing ports reduces the risk of pressure drop or signal lag across the sensing lines, while 1/4" tubing is retained for the standard supply and output air to match typical pneumatic infrastructure.

Can this be used for water pressure applications?
No, this is a dry-air media transmitter only. Utilizing liquids will damage the internal sensing diaphragm and pneumatic circuitry.

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.