Honeywell S301-IRF-R22 Sensor

As an updated direct replacement for the 301-IRFS-R22, the Honeywell S301-IRF-R22 is a professional-grade R-22 refrigerant gas sensor engineered for critical leak detection in chiller rooms and mechanical spaces. Utilizing advanced infrared sensing technology, this unit provides high-accuracy monitoring of R-22 levels without the cross-sensitivity issues common in lower-end electrochemical sensors. It is designed for seamless integration with the Honeywell 301EM-20 controller, ensuring your facility remains compliant with ASHRAE 15 and B-52 safety codes. The low-profile ABS-polycarbonate housing allows for mounting at low levels—where heavy refrigerant gases typically accumulate—providing early notification of leaks to protect personnel and expensive equipment. This 12 VDC powered Honeywell gas detector features a standard 4-20mA signal output and supports RS-485 Modbus communication, making it a reliable choice for modern building automation systems requiring precise refrigerant leak detection and robust performance in demanding environments.

• Direct Replacement: Purpose-built to upgrade and replace legacy 301-IRFS-R22 sensors with improved stability.
• Code Compliance: Facilitates meeting ASHRAE 15 mechanical standards for refrigeration mechanical rooms.
• Minimal Maintenance: The dual infrared sensor technology reduces the frequency of calibration compared to standard sensors.
• Rugged Construction: NEMA 1 rated housing protects internal gas sensing components from dust and mechanical room debris.
• Flexible Integration: Works via Modbus communication or analog 4-20mA to interface with various HVACR monitoring systems.

Is the S301-IRF-R22 compatible with my existing 301EM controller?
Yes, this sensor is specifically designed to function as the remote sensing head for the 301EM mechanical room controller series, including the 301EM-20.

Where is the recommended mounting height for R-22 detection?
Because R-22 is heavier than air, the S301-IRF-R22 should be mounted approximately 12 inches (30 cm) from the floor, ideally near the chiller pad or potential leak points.

Does this sensor detect gases other than R-22?
While calibrated specifically for R-22 refrigerant, infrared sensors in this family may show a response to other refrigerants like R-11 or R-410A; always verify cross-sensitivity data if multiple gases are present.

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.