Description
Honeywell XNX-RMSE-NHNNN
Technical Specifications Explosion-proof flameproof enclosure; Supports catalytic bead, electrochemical and infrared sensor modules; 4-20mA analog output with HART 6.0 protocol; Up to 3 programmable relay outputs; Operating temperature -40°C to +70°C; 24 VDC loop power supply; Backlit multilingual LCD display; 5 threaded cable entry ports.
Functional Features Universal sensor interface supports multiple gas types; Non-intrusive magnetic wand operation for configuration and calibration; Local LED status indicators; Built-in event log stores alarm, fault and calibration records; HART remote configuration and diagnostic; Modbus communication optional; Multi-level access password protection; Sensor fault self-diagnosis.
Application Scenarios Offshore oil and gas platform gas safety monitoring; Petrochemical plant hazardous gas detection; Refinery process area gas leak monitoring; LPG storage terminal; Chemical reactor workshop; Waste treatment plant toxic gas monitoring.
Performance Parameters 4-20mA signal accuracy ±1% full scale; HART communication data transmission stable; Relay switching action fast; LCD display visibility maintained under wide temperature range; Electromagnetic interference immunity meets ATEX / IECEx industrial standard.
Material Composition Marine grade coated aluminum alloy explosion-proof housing; Toughened transparent LCD window; Stainless steel cable glands; Multi-layer FR4 control PCB; Backlit LCD module; Magnetic sensor switch; Electronic signal processing chips.
Structural Features Round explosion-proof main housing; Front transparent display window; Multiple threaded cable ports distributed around housing; Internal modular compartment separates sensor chamber and electronic circuit chamber; Magnetic sensing zone on front cover; Rear mounting bracket for wall or pipe installation.
Working Principle Plug-in gas sensor module converts gas concentration into electrical signal. Main PCB circuit samples and processes sensor signal, compensates temperature drift and calculates gas concentration value. Display module shows real-time reading. When gas concentration exceeds set threshold, relay triggers alarm output. HART circuit superimposes digital diagnostic and configuration data onto 4-20mA analog loop signal. Magnetic sensor detects wand operation for parameter setup without opening flameproof cover.
Installation Requirements Mount transmitter on rigid wall or pipe bracket in suitable gas sampling location; Use certified explosion-proof cable glands for cable entry; Connect shielded twisted pair cable for 4-20mA HART loop; Ensure good protective earth connection; Verify hazardous area certification matches site classification; Leave clearance around device for gas diffusion.
Precautions for Use Do not open explosion-proof cover in explosive hazardous atmosphere; Perform regular gas calibration with standard gas; Keep front gas inlet and sensor path unblocked; Check cable gland sealing integrity periodically; Back up configuration parameters before sensor replacement.
