Schneider Electric (Barber Colman) 2252-701 Transmitter

The Schneider Electric 2252-701 is a precision-engineered pneumatic temperature transmitter designed for high-accuracy sensing in commercial HVAC ductwork. This Barber Colman averaging transmitter utilizes a 20-foot capillary element to provide an integrated temperature signal across a large cross-sectional area, effectively mitigating the risk of stratified air readings in mixed air or discharge air applications. Operating within a 50 to 150 degree temperature range with a fixed 100-degree span, the unit converts thermal energy into a proportional pneumatic output for seamless integration with legacy building automation systems. The thermal element is rated for a 266 degree maximum temperature, ensuring durability within high-limit environments. This duct mount temperature sensor is essential for precise HVAC pneumatic control, providing reliable performance for air handling units. Its rugged construction and averaging element technology make it a staple for contractors maintaining large-scale environmental control systems where thermal stratification is a concern.

• 20-foot averaging element eliminates inaccuracies caused by air pockets or stratification in large ducts.
• 100-degree span calibrated for standard 50°F to 150°F ranges, ideal for discharge and return air monitoring.
• Duct mounting configuration ensures secure installation and long-term chemical resistance to bypass air.
• Pneumatic signal reliability supports legacy Barber Colman and Schneider Electric control loops without the need for electronic conversion.
• High thermal element tolerance prevents damage during high-temperature system flushes or extreme environmental conditions.

Common Installation and Application Questions:

How do I ensure accurate readings with a 20' averaging element? To maintain signal integrity, snake the capillary across the entire duct cross-section using mounting clips, ensuring it does not touch the duct walls or heating/cooling coils directly.

What is the maximum pressure rating for the 2252-701 transmitter? Standard pneumatic control systems typically supply 20 psi to these units; always verify your supply air is clean, dry, and regulated to prevent contamination of the internal nozzle-and-flapper assembly.

Can this transmitter be used in outdoor air intakes? Yes, provided the sensing range falls within the 50°F to 150°F parameters and the housing is protected from direct moisture infiltration.

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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.