Schneider Electric (Barber Colman) 2232-053 Humidity Transmitter

The Schneider Electric 2232-053 Humidity Transmitter is a precision-engineered pneumatic room humidity transmitter designed for high-accuracy sensing in commercial HVACR control loops. Operating on a force-balance principle, this one-pipe transmitter utilizes a high-sensitivity hygroscopic nylon element to detect relative humidity between 30% and 80% RH. It converts these readings into a linear 3 to 15 psig output signal, making it a critical component for receiver-controllers and sensitive pressure switches in legacy and modern pneumatic automation systems.

This unit is the direct replacement for Barber Colman 2232-052, 2232-252, and HKS-53 models, ensuring seamless mechanical compatibility without extensive field modifications. It features a 20 psig main air operating pressure and an efficient 29 scim air consumption rate. The 2232-053 is built with corrosion-resistant internal components and an integrated pneumatic filter to prevent orifice clogging and maintain calibration stability in demanding environments. Installation is streamlined via a barbed nipple designed for 3/16" O.D. spring reinforced tubing.

• Precise Direct Acting Control: Proportional 3-15 psig output ensures linear response for accurate humidity regulation.
• Legacy System Compatibility: Serves as a drop-in replacement for HKS-53 and 2232-052, reducing downtime during maintenance.
• Industrial-Grade Build: Features a ball valve for pneumatic feedback and a protected hygroscopic element for long-term drift resistance.
• Simplified Integration: The barbed fitting for 3/16 inch O.D. tubing allows for fast, secure connections in standard pneumatic panels.

Is an external restrictor required for the 2232-053?
Yes, as a one-pipe transmitter, this device requires an external 21 scim restrictor in the supply line to function correctly with receiver-controllers.

Can this transmitter be used in outdoor air applications?
The 2232-053 is specifically designed as a room humidity transmitter. For outdoor air or duct-mounted applications, ensure the ambient temperature remains within the 40 to 140°F operating range and the unit is protected from direct water exposure.

What is the output pressure if the humidity falls below 30% RH?
The output will typically drop toward the 3 psig baseline as the relative humidity decreases below the effective 30% sensing span.

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.