Description
The Honeywell Analytics SPXCDULNRXM is a professional-grade, explosion-proof combustible gas transmitter engineered for reliable methane (CH4) detection in demanding industrial and commercial environments. Utilizing advanced infrared (IR) sensing technology, this transmitter delivers accurate, drift-resistant gas concentration measurements across the full 0–100% LEL (Lower Explosive Limit) range — making it an ideal solution for facilities where combustible gas hazards must be continuously monitored.
Built for harsh-duty applications, the SPXCDULNRXM features a rugged aluminum enclosure rated for explosion-proof installation, providing the mechanical protection and environmental resilience required in oil and gas, utilities, manufacturing, and HVAC plant rooms. The unit outputs a standard 4–20 mA analog signal for seamless integration with building automation systems, PLCs, and safety controllers, while the onboard Modbus communication protocol enables digital data transmission over RS-485 networks for advanced monitoring and diagnostics.
Three onboard relays provide direct alarm and control outputs, allowing the transmitter to trigger ventilation, shutoffs, or alarm panels at user-defined gas concentration thresholds — without requiring additional relay modules.
Key Features
- Infrared (IR) sensing technology for long-term stability and reduced maintenance
- Target gas: Methane (CH4)
- Measurement range: 0–100% LEL
- Analog output: 4–20 mA
- 3 onboard relays for alarm and control outputs
- Modbus RTU communication for digital network integration
- Explosion-proof rated aluminum enclosure for hazardous location installation
- Suitable for industrial, commercial, and utility gas detection applications
Applications
- Natural gas and methane leak detection in mechanical rooms
- Oil and gas processing facilities
- Utility and power generation plants
- Industrial manufacturing environments
- Commercial HVAC and boiler rooms
- Confined space and hazardous area monitoring
Why Choose the SPXCDULNRXM?
IR-based gas detection technology eliminates the sensor poisoning and drift issues common with catalytic bead sensors, resulting in lower total cost of ownership and greater measurement reliability over time. The combination of analog 4–20 mA output, Modbus communications, and three independent relays gives facility managers and engineers maximum flexibility in system design — from simple standalone alarming to fully integrated building management and safety systems. The explosion-proof aluminum housing ensures compliance with hazardous location requirements, providing peace of mind in environments where combustible gas accumulation poses a serious risk.
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