Johnson Controls DP1400X5B21D Transducer

The Johnson Controls DP1400X5B21D is a high-precision low differential pressure transducer designed for critical HVAC monitoring and building automation systems. Engineered as a bidirectional pressure sensor, it handles a range of plus/minus 0.5"wc, making it ideal for cleanrooms, hospital isolation zones, and VAV box control. This unit serves as the direct replacement for DPT2641-0R5B, ensuring a seamless field upgrade without recalibration of the controller's input scaling. The 4-20mA output signal provides robust noise immunity over long cable runs, while the IP67-rated housing protects internal electronics from moisture and particulate ingress in demanding mechanical rooms. With a plus/minus 0.5% accuracy rating, the DP1400X5B21D ensures reliable static pressure readings. Installation is streamlined via the 1/4" push-on barb fitting process connections, which maintain a secure seal under varying pneumatic loads. For technicians troubleshooting airflow tracking or building envelope pressurization, this transducer offers the thermal stability and long-term signal integrity required for precise environmental control.

Key Benefits for Contractors

• Field Interchangeability: Direct drop-in replacement for the legacy Setra/Johnson Controls DPT2641-0R5B series.
• Environmental Protection: IP67-rated enclosure allows for installation in wash-down environments or high-humidity mechanical spaces.
• High Signal Integrity: The 4-20mA loop-powered output minimizes electromagnetic interference (EMI) issues in dense electrical panels.
• Precision Sensing: Capacitive sensing technology delivers 0.5% full-scale accuracy for tight tolerance pressure monitoring.
• Simplified Plumbing: Standard 1/4" barb fittings allow for fast connection to common clear vinyl or FRPE tubing.

Common Questions

Is the DP1400X5B21D compatible with older DPT-264 systems?
Yes, this unit is the engineered successor to the DPT2641-0R5B. It maintains the identical footprint, electrical specifications, and low differential pressure range for easy retrofitting.

How do I wire this transducer to a building automation controller?
This is a standard 2-wire, 4-20mA device. Connect the positive terminal to your 24VDC power supply and the signal terminal to your analog input, ensuring the loop is properly grounded per local electrical codes.

Can this sensor handle bidirectional airflow?
Specifically designed as a bidirectional pressure sensor, it monitors both positive and negative pressure relative to the reference port within the +/- 0.5"wc range.

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.