{"product_id":"xnx-amse-rhnnn-honeywell-universal-transmitter-electrochemical-sensor-hart-relay","title":"XNX-AMSE-RHNNN Honeywell Universal Transmitter Electrochemical Sensor HART Relay","description":"\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMSE-RHNNN Honeywell\u003c\/strong\u003e\u003c\/span\u003e Universal Transmitter delivers precision toxic gas monitoring and oxygen depletion detection across high-consequence processing operations. Engineered with a painted 316 stainless steel enclosure, this unit contains an integrated intrinsically safe (IS) barrier and interface adapter tailored for plug-and-play electrochemical (EC) sensor cartridges. Instrumentation specialists gain dual-output safety coverage: analog 4-20mA signal transmission with HART digital protocol, plus three internal electromechanical relays for direct hardware interlocks.\u003c\/p\u003e\n\u003ch3\u003eConfiguration Architecture Breakdown\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHoneywell XNX Series Platform\u003c\/strong\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproval Rating [A]:\u003c\/strong\u003e ATEX \/ IECEx Hazardous Zone Certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Entry [M]:\u003c\/strong\u003e 5 x M25 Threaded Gland Entries\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing Material [S]:\u003c\/strong\u003e Painted 316 Marine-Grade Stainless Steel (6.8 kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePersonality Interface [E]:\u003c\/strong\u003e Electrochemical (EC) Cartridges (Includes IS Barrier \u0026amp; Adaptor)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Hardware Option [R]:\u003c\/strong\u003e 3 x Form \"C\" SPCO Relays Installed (2 Alarm, 1 Fault)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocal Diagnostic Interface [H]:\u003c\/strong\u003e Integrated External Local HART Port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Selection [NNN]:\u003c\/strong\u003e Base Transmitter Frame (Electrochemical Cell Sold Separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications \u0026amp; Operating Boundaries\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eEngineering Parameter\u003c\/th\u003e\n\u003cth\u003eField Specification Detail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHoneywell\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull Order Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMSE-RHNNN\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHoneywell XNX Universal Gas Transmitter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHoneywell XNX Toxic Gas \u0026amp; Oxygen (O2) Electrochemical Cartridges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInternal Safety Circuitry\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBuilt-in Intrinsically Safe (IS) Galvanic Isolation Barrier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrimary Communication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-20mA Analog Current Loop with HART Digital Protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSecondary Contact Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 x SPCO Relays (250 VAC \/ 24 VDC @ 5A Resistive Load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLocal Calibration Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal Intrinsically Safe Local HART Connection Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIngress Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP66 Weatherproof and Dust-Tight Enclosure Rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +65°C (-40°F to +149°F) Base Unit Enclosure Limits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Humidity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 to 99% RH Non-Condensing Operating Window\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Air Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80 kPa to 120 kPa Absolute Pressure Standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit Net Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.8 Kg (Heavy-Duty Stainless Steel Construction)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatible Hardware \u0026amp; Operational Deployments\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Electrochemical Sensing Cartridges:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eHydrogen Sulfide (H2S), Carbon Monoxide (CO), Chlorine (Cl2), Ammonia (NH3), and Hydrogen (H2) Toxic Cells.\u003c\/li\u003e\n\u003cli\u003eOxygen (O2) Depletion and Enrichment Electrochemical Sensors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal Industrial Facilities:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eOffshore oil platforms, FPSOs, and marine chemical transport terminals requiring 316SS corrosion protection.\u003c\/li\u003e\n\u003cli\u003eWastewater treatment plants, sludge digestors, and municipal chemical dosing rooms.\u003c\/li\u003e\n\u003cli\u003eSemiconductor manufacturing sub-fab areas, gas storage vaults, and battery energy storage skids.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDiagnostic \u0026amp; Predictive Self-Monitoring Capabilities\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMSE-RHNNN Honeywell\u003c\/strong\u003e\u003c\/span\u003e transmitter features continuously active self-diagnostic firmware that verifies internal memory integrity, galvanic barrier loop resistance, loop voltage, and sensor cell response baseline. If an electrochemical cell suffers electrolyte dry-out, pin degradation, or signal drift beyond safety limits, the unit automatically drops its 4-20mA loop output to fault status (≤2.0mA) and trips the dedicated internal Fault Relay contact, preventing false-safe readings during critical process excursions.\u003c\/p\u003e\n\u003ch3\u003eModel Selection Comparison \u0026amp; Engineering Recommendation\u003c\/h3\u003e\n\u003cp\u003eEvaluating mechanical casing materials, sensor input types, and internal hardware options ensures proper safety loop deployment. Below is a side-by-side engineering comparison between the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMSE-RHNNN\u003c\/strong\u003e\u003c\/span\u003e transmitter and the alternative \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/xnx-amav-nhnnn-honeywell-aluminum-transmitter-best-price\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMAV-NHNNN\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e model configuration:\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSelection Specification\u003c\/th\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMSE-RHNNN\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.plcsparehub.com\/products\/xnx-amav-nhnnn-honeywell-aluminum-transmitter-best-price\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMAV-NHNNN\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Personality Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e'E' Personality (Electrochemical Toxic \/ O2 with IS Barrier)\u003c\/td\u003e\n\u003ctd\u003e'V' Personality (mV Bridge for Catalytic Bead \/ MPD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Construction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePainted 316 Stainless Steel Housing (6.8 kg)\u003c\/td\u003e\n\u003ctd\u003ePainted LM25 Marine-Grade Aluminum (2.8 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInternal Relay Option\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 x SPCO Mechanical Relays Included\u003c\/td\u003e\n\u003ctd\u003eNo Relays Installed (Loop-Powered \/ Signal Only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLocal HART Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated External Local HART Port Included\u003c\/td\u003e\n\u003ctd\u003eIntegrated External Local HART Port Included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEntry Thread Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 x M25 Metric Entry Ports\u003c\/td\u003e\n\u003ctd\u003e5 x M25 Metric Entry Ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eEngineering Advice:\u003c\/strong\u003e Specify the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMSE-RHNNN\u003c\/strong\u003e\u003c\/span\u003e for toxic gas or oxygen monitoring applications situated in highly corrosive salt-mist environments where direct local alarm relay tripping (horns, exhaust fans, valve actuators) is required. Select the \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/xnx-amav-nhnnn-honeywell-aluminum-transmitter-best-price\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMAV-NHNNN\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e when measuring flammable hydrocarbon gases via catalytic bead sensors, where weight constraints favour aluminum enclosures, and all alarm logic is processed centrally by a DCS or Safety PLC system.\u003c\/p\u003e\n\u003ch3\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eOn a recent offshore wastewater skid retrofitting project, maintenance personnel reported frequent transducer corrosion and ground loop interference when installing standard toxic gas sensors. Upgrading the system to the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eXNX-AMSE-RHNNN Honeywell\u003c\/strong\u003e\u003c\/span\u003e resolved both challenges. The 316SS housing eliminated salt spray degradation, while the built-in IS barrier permitted safe hot-swapping of H2S electrochemical cartridges. Utilizing the external local HART port allowed field technicians to perform routine zero calibrations using handheld calibrators without unsealing the flameproof enclosure or acquiring a hot-work permit.\u003c\/p\u003e\n\u003ch3\u003eWarranty Terms, Logistics \u0026amp; Shipping\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Condition:\u003c\/strong\u003e 100% Brand New Original Factory Supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Guarantee:\u003c\/strong\u003e Standard 12-Month Quality Warranty from dispatch date\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder Processing Time:\u003c\/strong\u003e Rapid turnaround, shipping within 24 to 48 hours post-payment verification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Logistics Express:\u003c\/strong\u003e Express door-to-door delivery via FedEx, UPS, and DHL Express networks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Selection \u0026amp; Application FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the function of the internal IS barrier built into the 'E' personality model?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe integrated intrinsically safe barrier restricts electrical energy going to the electrochemical cell socket, allowing field operators to replace toxic gas sensor cartridges safely under power without opening the main enclosure or de-classifying the hazardous area.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install an infrared or catalytic bead sensor into this 'E' personality transmitter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The internal personality board on this model is calibrated specifically for electrochemical toxic and oxygen cells. Infrared or millivolt catalytic sensors require different transmitter personality configurations such as 'I' or 'V'.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the local external HART port facilitate field servicing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe external HART connection on the bottom of the enclosure allows technicians to plug in an intrinsically safe HART communicator directly in hazardous zones, enabling rapid diagnostic checks without disturbing internal terminal wiring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the 316 stainless steel casing recommended for offshore toxic gas detection?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eToxic gases like H2S combined with marine salt mist quickly pit and degrade standard aluminum housings over time. Heavy-duty 316 stainless steel prevents structural degradation, preserving the explosion-proof boundary for years of continuous service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the three internal SPCO relays independently configurable for different alarm thresholds?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Through the magnetic wand menu interface or HART protocol, engineers can independently program alarm 1, alarm 2, and fault relay trigger points, energize\/de-energize states, and latching modes to drive custom local emergency shutdown sequences.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/XNX_2.png?v=1787714324\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":45384032321718,"sku":"XNX-AMSE-RHNNN","price":119.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/XNX-AMAI-RNNNN_b1769607-73fb-4422-80b9-0ebb7b3dabb1.jpg?v=1787716348","url":"https:\/\/www.plcsparehub.com\/ar\/products\/xnx-amse-rhnnn-honeywell-universal-transmitter-electrochemical-sensor-hart-relay","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}