Honeywell Analytics S301-IRF-R123 Gas Sensor

The Honeywell Analytics S301-IRF-R123 is an industrial-grade R123 refrigerant gas sensor designed for integration with the 301C controller. Engineering for precision in mechanical rooms and chiller plants, this infrared-based transmitter replaces legacy models including the 301-IRFS-R123, M-505413, and VA301IRFSR123. Utilizing non-dispersive infrared (NDIR) technology, the S301-IRFS provides high-selectivity detection of R123, minimizing cross-sensitivity to other gases or humidity fluctuations. This refrigerant leak detection system ensures compliance with ASHRAE 15 and local safety codes by providing rapid response times in high-occupancy commercial environments. The unit features a Modbus RS-485 digital output for seamless communication, allowing for real-time monitoring of leak concentrations. Its rugged housing is built to withstand atmospheric variations typically found in heavy-duty HVACR applications, ensuring stable calibration and consistent signal output for long-term monitoring of low-pressure centrifugal chillers.

• Precision NDIR Sensing: Utilizes advanced infrared technology for high-accuracy R123 detection without the sensor drift common in electrochemical alternatives.
• Legacy Compatibility: Direct drop-in replacement for 301-IRFS series sensors and part numbers M-505413 and VA301IRFSR123.
• Digital Integration: Features Modbus communication protocols for easy networking with Honeywell 301C controllers and building automation systems.
• ASHRAE Compliance: Engineered to meet safety standards for mechanical room monitoring and personnel protection.
• Low Maintenance: The infrared cell design offers a longer service life and reduced calibration frequency compared to standard MOS sensors.

Common Questions

Is the S301-IRF-R123 compatible with older 301C controllers?
Yes, this sensor is specifically designed to communicate with the Honeywell 301C controller series. It functions as a remote transmitter to provide localized R123 concentration data back to the central monitoring hub.

What is the typical detection range for this refrigerant sensor?
This transmitter is generally configured for a 0-1000 ppm range, providing the sensitivity required to detect minor leaks before they reach hazardous levels or cause significant loss of refrigerant charge.

Does this unit require a separate power supply?
The unit typically draws power directly from the 301C controller via the communication bus, simplifying wiring for multi-point detection networks in large chiller rooms.

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.