Dongfeng xinjiang truck parts Gas leakage alarm sensor assembly 3638520-T5WF02Y

Built as a critical safety component for gas-powered trucks, this sensor assembly delivers ultra-sensitive detection of LNG/CNG leaks with industry-leading response performance. It adopts a catalytic combustion sensing element that detects methane (main component of natural gas) concentrations ranging from 0-100% LEL (Lower Explosive Limit). The detection threshold is set to 10% LEL—triggering an alarm within 1 second of gas leakage, far faster than the 3-second industry average. The sensor’s signal-to-noise ratio (SNR) ≥80dB ensures no false alarms from environmental interference (e.g., exhaust fumes, dust). It maintains consistent sensitivity even in temperature fluctuations (-40℃ to 85℃), ensuring reliable warning in extreme cold (northeast China) and high-temperature (Xinjiang desert) conditions, effectively preventing fire and explosion risks

Beyond leak detection, the assembly features a multi-channel alarm system that integrates with the truck’s safety infrastructure for layered protection. When a leak is detected, it simultaneously outputs three signals: a 5V digital signal to the GCU (triggering automatic gas valve shutdown), an analog signal to the cab instrument panel (activating a red LED indicator), and an acoustic signal via the built-in 85dB buzzer. The GCU linkage function closes the main gas valve within 0.5 seconds, cutting off the gas supply to prevent further leakage. The cab alarm includes a “TEST” button for daily self-check, allowing drivers to verify sensor functionality before departure. This multi-dimensional alarm design ensures drivers, fleet managers, and the vehicle’s safety system all receive timely warnings, maximizing accident prevention

Engineered for the hazardous environment of gas-powered trucks, the sensor assembly meets IP67 waterproof/dustproof and Ex d IIB T4 Ga explosion-proof ratings. The housing is made of die-cast aluminum alloy (ADC12) with a flameproof seal, preventing gas ignition inside the sensor. The sensing element is encapsulated in a stainless steel mesh filter that blocks dust and liquid while allowing gas to pass. The outer surface undergoes electrophoretic coating (80μm thickness) and powder coating, resisting corrosion from road salt, gas impurities, and industrial contaminants—passing 1500-hour salt spray testing (ASTM B117). The wiring harness uses oil-resistant, flame-retardant PVC insulation with a braided stainless steel shield, ensuring no electrical short circuits even in wet or dusty conditions

Optimized for fleet safety management and maintenance efficiency, the sensor assembly features a user-friendly design. The 4-pin waterproof connector uses a plug-and-play mechanism that mates with the GCU wiring harness in 3 seconds, while 4 M5×10 stainless steel bolts secure the sensor to the original bracket—requiring only a torque wrench (8-10N·m) for installation. A single technician can complete replacement in 20 minutes. The sensor’s self-calibration function (activated during engine startup) eliminates the need for regular manual calibration, reducing maintenance workload by 80%. With a service life of ≥200,000km and a 2-year warranty, it minimizes replacement frequency and safety-related downtime. Clear laser-etched markings (part number, detection direction) prevent installation errors, ensuring every unit functions as intended from day one