{"product_id":"bently-nevada-350800-01-180-00-hazardous-gas-sensor","title":"Capteur de gaz dangereux Bently Nevada 350800-01-180-00","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 350800-01-180-00\u003c\/strong\u003e is a high-performance \u003cstrong\u003eHazardous Gas Sensor\u003c\/strong\u003e designed for use within the \u003cstrong\u003e3500\/63 Hazardous Gas Detection System\u003c\/strong\u003e. This continuous-diffusion catalytic bead sensor provides critical machinery and personnel protection by continuously monitoring areas for combustible gases, specifically focusing on methane (CH4) and hydrogen (H2).\u003c\/p\u003e\n\u003cp\u003eThe sensor operates via a matched pair of catalytic and reference beads that form a Wheatstone bridge configuration when interfaced with the \u003cstrong\u003e3500\/63\u003c\/strong\u003e monitor module. The catalytic bead is coated with a premium oxidization-promoting catalyst, while the reference bead is specially treated to inhibit oxidization. When combustible gas comes into contact with the sensing surface, the electrical current supplied by the monitor heats the beads, initiating localized oxidation at the catalytic bead. This chemical reaction increases the temperature and internal resistance of the active bead relative to the reference bead, unbalancing the Wheatstone bridge proportionally to the concentration of the target combustible gas up to 100% LEL.\u003c\/p\u003e\n\u003cp\u003eEngineered for extreme reliability, the \u003cstrong\u003eBently Nevada 350800-01-180-00\u003c\/strong\u003e can be threaded directly into standard structural conduit lines or integrated into a dedicated flameproof junction box enclosure to optimize routing and simplify field wiring terminations. The sensor configuration requires a continuous constant current of 300 mA from an external power source regulated directly through the \u003cstrong\u003e3500\/63\u003c\/strong\u003e monitor and input\/output (I\/O) module array.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Bead Wheatstone Bridge Configuration\u003c\/strong\u003e: Combines an active catalytic bead and an oxidation-inhibited reference bead for precise differential tracking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated Gas Target Detection\u003c\/strong\u003e: High sensitivity and specific tuning for methane (CH4) and hydrogen (H2) explosive limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Dynamic Temperature Window\u003c\/strong\u003e: Certified for continuous operational stability in ambient temperature profiles extending from -40 Celsius to 200 Celsius.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Installation Profile\u003c\/strong\u003e: Supports standard industrial conduit direct threading or flameproof enclosure integration for rapid swap field cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Life Horizon\u003c\/strong\u003e: Robust physical construction delivering a minimum operational service window of 2 years and a typical lifecycle up to 5 years under standard operating environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTurbine Enclosure Combustible Gas Monitoring\u003c\/li\u003e\n\u003cli\u003eHydrogen-Cooled Generator Seal Oil Systems\u003c\/li\u003e\n\u003cli\u003eOil and Gas Hydrocarbon Processing Facilities\u003c\/li\u003e\n\u003cli\u003eChemical and Petrochemical Manufacturing Areas\u003c\/li\u003e\n\u003cli\u003eCompressed Gas Storage and Distribution Facilities\u003c\/li\u003e\n\u003cli\u003eCompressor Station Gas Infrastructure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e350800\u003c\/strong\u003e: Hazardous Gas Sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e01\u003c\/strong\u003e: 180 Inch Lead.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e180\u003c\/strong\u003e: 180 Inch Lead.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e00\u003c\/strong\u003e: None Housing Option.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eSpecification Value\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003eBently Nevada (A Baker Hughes Business \/ General Electric Company)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003eUnited States of America\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003e\u003cstrong\u003eSensor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003eFlameproof, continuous diffusion, catalytic bead\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\"\u003e\u003cstrong\u003eTarget Gases\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"5\"\u003eMethane (CH4) and Hydrogen (H2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"6\"\u003e\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"6\"\u003e0% to 100% LEL (Lower Explosive Limit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"7\"\u003e\u003cstrong\u003eConstant Current Drive\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"7\"\u003e300 mA per sensor channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"8\"\u003e\u003cstrong\u003eInitial Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"8\"\u003e\u0026gt; 15 mV \/ % LEL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"9\"\u003e\u003cstrong\u003eMinimum Calibration Threshold\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"9\"\u003e6 mV \/ % LEL (Spent\/poisoned cut-off)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"10\"\u003e\u003cstrong\u003eLong-Term Zero Drift\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"10\"\u003e\u0026lt; ±2.5% LEL per month (at 20 degC, 50% RH, 101 kPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"11\"\u003e\u003cstrong\u003eLong-Term Sensitivity Drift\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"11\"\u003e\u0026lt; 2.5% Signal per month (at 20 degC, 50% RH, 101 kPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"12\"\u003e\u003cstrong\u003eTemperature Zero Shift\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"12\"\u003e≤ ±5% LEL over range -40 Celsius to 200 Celsius\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"13\"\u003e\u003cstrong\u003eStep Response Time (T50)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"13\"\u003e\u0026lt; 10 s to reach 50% LEL reading with 100% LEL gas applied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"14\"\u003e\u003cstrong\u003eStep Response Time (T60)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"14\"\u003e\u0026lt; 12 s to reach 60% LEL reading with 100% LEL gas applied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"15\"\u003e\u003cstrong\u003eManual Calibration Flow Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"15\"\u003e0.5 L \/ min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"16\"\u003e\u003cstrong\u003eRemote Calibration Flow Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"16\"\u003e2.0 L \/ min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"17\"\u003e\u003cstrong\u003eOperating Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"17\"\u003e-40 Celsius to 200 Celsius (-40 Fahrenheit to 392 Fahrenheit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"18\"\u003e\u003cstrong\u003eLead Wire Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"18\"\u003e180 Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"19\"\u003e\u003cstrong\u003eHousing Enclosure Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"19\"\u003eNone (Screws directly into conduit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eConnector Pin \/ Wire Color\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eFunction \/ Signal Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003e\u003cstrong\u003eWhite\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003eVb (Wheatstone Bridge Volts Return Connection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003e\u003cstrong\u003eRed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003eVx (Constant Current Input Line Positive \/ Bridge Excitation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003e\u003cstrong\u003eBlack\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003eReturn (Constant Current Return \/ Negative Signal Line)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Configurations\u003c\/strong\u003e: Always confirm field wire mapping and continuity metrics across all termination blocks prior to powering on the system. Never short any structural active sensor leads directly to the localized system earth ground plane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Cable Optimization\u003c\/strong\u003e: Do not under any circumstances allow extra loop coiling of excess lead length sections inside the sensor junction box or flameproof enclosure spaces. Field engineers must trim and strip all lead paths down to the true required functional run distance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot Swap Sequence\u003c\/strong\u003e: When performing live maintenance or physical replacement of a sensor under active system rack power, ensure the immediate workspace environment is clear of hazardous gas concentrations. During physical removal, disconnect the black reference line last. When engaging the new terminal interface, connect the black lead first.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Degradation Elements\u003c\/strong\u003e: Prevent direct physical contact or exposure of the catalytic bead faces to chemical agents or cross-contaminating substances including silicone-based RTV formulations, wet paints, and surrounding welding plume exhaust vapors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture Exposure Mitigation\u003c\/strong\u003e: Position the face assembly away from locations susceptible to high condensation pools or streaming liquid washdown vectors to prevent water block entry at the sensor diffusion plate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrientation and Flow Mechanics\u003c\/strong\u003e: If installing sensors within structural ventilation paths, ductways, or localized force-draft streams, verify that the active sensing window faces directly into the primary airflow currents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eATEX \/ IECEx Zone 1 Protection\u003c\/strong\u003e: II 2G Ex d IIB+H2 T2 (Flameproof protection classification certified for Zone 1 locations, permissible for methane and hydrogen environments with a maximum temperature class threshold ≤ 300 Celsius).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNorth American Class 1 Div 1 \/ Zone 1 Standards\u003c\/strong\u003e: Class 1, Zone 1, AEx d IIB+H2 T2 (FM 3021960 certified for operation across an ambient window of -40 Celsius ≤ Ta ≤ 200 Celsius).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat gases can be detected with the 350800 sensor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe sensor is designed specifically to detect methane and hydrogen gas concentrations up to their lower explosive limits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the length of the lead wire provided with this model?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis model comes with a factory-integrated 180-inch lead wire.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the minimum warm-up timeline required before attempting a field calibration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe sensor must be powered continuously via the monitoring system for at least 30 minutes to stabilize before beginning calibration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens if the internal sensitivity of the sensor falls below 6 mV\/% LEL?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe sensor will fail system verification checks and cannot be calibrated, indicating it is spent or poisoned.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the excess lead wire be coiled inside the housing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, coiling excess lead wire inside junction boxes can cause interference and is prohibited; leads must be cut to the required installation length.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum operating temperature limit for this sensor head?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe sensor is rated for reliable continuous operation in extreme environments up to 200 Celsius.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the primary operational mechanism behind the sensor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt uses a matched catalytic and reference bead Wheatstone bridge circuit that detects the temperature variance caused by gas oxidation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often does the monitoring system require recalibration of the sensor channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe hazardous gas channel and sensor combination must be calibrated at minimum every 90 days to comply with safety compliance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the primary chemical poisons that damage the catalytic element?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSilicone-based RTV compounds, chlorinated hydrocarbons, metal hydrides, and heavy hydrocarbon vapors will poison or reduce bead sensitivity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat calibration flow rate is required when performing a manual calibration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA regulated flow rate of 0.5 liters per minute must be maintained during a standard manual calibration cycle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this specific model include a flameproof housing enclosure?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the option suffix indicates it is supplied without a housing, allowing direct integration into conduit networks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the expected life expectancy of the sensor in standard industrial service?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe sensor provides a minimum life of 2 years, with an average service lifecycle reaching up to 5 years under normal conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat color-coding standard is utilized for field terminal connection wiring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe sensor connections use a 3-wire format consisting of a White wire for return, a Red wire for excitation, and a Black wire for constant current.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this sensor be deployed in Zone 1 locations?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the sensor is certified flameproof with ATEX\/IEC markings for safe installation inside Zone 1 hazardous environments.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666857685355,"sku":"350800-01-180","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-350800-01-180-hazardous-gas-sensor-pslinv2nmtr_02b13992-be9b-4c2d-ac7b-8b8a91195e57.jpg?v=1765449221","url":"https:\/\/www.plcprotech.com\/fr\/products\/bently-nevada-350800-01-180-00-hazardous-gas-sensor","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}