Schneider Electric (Barber Colman) 2252-250 Temperature Transmitter

The Schneider Electric (Barber Colman) 2252-250 Temperature Transmitter is a precision-engineered pneumatic temperature transmitter designed for direct-acting proportional control in commercial HVACR environments. This high-stability unit measures air or fluid temperatures and converts them into a standardized 3 to 15 psig output signal. With a calibrated 0 to 100 degree temperature range and a corresponding 100-degree span, it provides a reliable interface for receiver-controllers and pneumatic building automation systems. The hardware features a rugged 1/4 inch x 9 3/8 inch rigid sensing element constructed with a liquid-filled copper bulb and a beryllium copper feedback bellows to ensure linear response and minimize hysteresis. Suitable for duct mounting or immersion mounting in a well, the unit includes a cast aluminum base and a field-accessible zero adjustment to fine-tune the signal at the job site. Designed as a one-pipe device, it operates optimally on a 20 psig supply through a 1.0 scfh restrictor.

Key Benefits

• Versatile Installation: Supports both duct insertion and immersion well mounting for air handling units or fluid piping.
• Industrial Durability: Features a zinc-plated steel cover and cast aluminum base for field resilience.
• Precise Calibration: The beryllium copper feedback bellows ensures high linearity and long-term signal stability.
• Flexible Integration: Provides a standard 3 to 15 psig output compatible with most pneumatic receiver-controllers.
• User Adjustable: Includes a field-accessible zero adjustment screw to calibrate the transmitter to specific site conditions.

Common Questions

The thermal element is rated for a maximum temperature of 216 degrees Fahrenheit. Exceeding this limit may damage the liquid-filled copper bulb and affect calibration accuracy.

Yes, the rigid element is designed for immersion mounting; however, a compatible immersion well (such as the 20-778 or AT-201 series) is typically required for pressurized liquid lines.

The Schneider 2252-250 features a 1/8 inch FNPT air connection. For proper operation, ensure the supply air is clean, dry, and oil-free, delivered through a 1.0 scfh restrictor.

This item is not eligible for free shipping.

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.