{"product_id":"xnx-amai-nhcb1-honeywell-xnx-gas-transmitter-local-hart","title":"XNX-AMAI-NHCB1 Honeywell XNX Gas Transmitter Local HART","description":"\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e Honeywell XNX Universal Gas Transmitter Architecture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell \u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e delivers comprehensive, explosion-proof monitoring for flammable hazards across industrial automation infrastructure. Built upon a standardized transmitter architecture, this \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX Universal Transmitter\u003c\/span\u003e\u003c\/strong\u003e platform harmonizes signal wiring, field operations, and control panel integration across diverse gas detection modules. Instrumentation engineers rely on this painted aluminum housing assembly to secure refinery processing units, offshore platforms, and gas distribution hubs against combustible atmospheric gas leaks.\u003c\/p\u003e\n\u003cp\u003eThis specific model integrates a high-sensitivity Catalytic Bead (CB1) sensor cartridge rated for 0-100% LEL flammable gas concentrations. Featuring an infrared multi-purpose personality interface, the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e directly supports remote optical devices such as Honeywell Searchline Excel and Searchpoint Optima alongside third-party 3-wire 4-20mA current loop inputs. Equipped with a factory-installed local HART IS port, field technicians connect HART handheld calibrators directly at the transmitter in hazardous classified locations without compromising enclosure safety integrity.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e Model Configuration Breakdown\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul style=\"list-style-type: none; padding-left: 0;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e[XNX] Platform:\u003c\/strong\u003e Honeywell XNX Universal Transmitter Base Unit\u003c\/li\u003e\n\u003cli\u003e  └── \u003cstrong\u003e[A] Certification:\u003c\/strong\u003e ATEX \/ IECEx Hazardous Area Safety Standard\u003c\/li\u003e\n\u003cli\u003e      └── \u003cstrong\u003e[M] Thread Type:\u003c\/strong\u003e 5 x M25 Metric Conduit Cable Entries\u003c\/li\u003e\n\u003cli\u003e          └── \u003cstrong\u003e[A] Enclosure Material:\u003c\/strong\u003e LM25 Marine-Grade Painted Aluminum\u003c\/li\u003e\n\u003cli\u003e              └── \u003cstrong\u003e[I] Personality Card:\u003c\/strong\u003e Infrared Products (Searchline Excel, Searchpoint Optima \u0026amp; Generic 4-20mA Input)\u003c\/li\u003e\n\u003cli\u003e                  └── \u003cstrong\u003e[N] Option Slot:\u003c\/strong\u003e Standard Core Architecture (No Relay \/ Modbus Card)\u003c\/li\u003e\n\u003cli\u003e                      └── \u003cstrong\u003e[H] Local Port:\u003c\/strong\u003e Built-In Intrinsically Safe Local HART Interface Connection\u003c\/li\u003e\n\u003cli\u003e                          └── \u003cstrong\u003e[CB1] Sensor Module:\u003c\/strong\u003e Catalytic Bead Cell (0 to 100% LEL Combustible Gas Range)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Parameters \u0026amp; Performance Profile\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand Manufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eHoneywell \u003cspan style=\"color: #0056b3;\"\u003eXNX Gas Transmitter Series\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTarget Detection Gas\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCombustible Hydrocarbons \/ Flammable Gases (0-100% LEL Range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensing Module Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCB1 Catalytic Bead Poison-Resistant Sensor Cell\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\u003eExternal Intrinsically Safe (IS) HART Terminal Interface Included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Construction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLM25 Marine-Grade Aluminum with Epoxy Paint Coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConduit Entry Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 x M25 Threaded Entry Ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Signal Protocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3-Wire 4-20mA Analog Output with Superimposed Digital HART\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Linearity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±1% FS Deviation Across Operating Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResponse Time Speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT90 \u0026lt; 15 seconds (Catalytic Bead Target Gas Exposure)\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) continuous operating envelope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIngress \u0026amp; Hazard Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP66 \/ NEMA 4X Protection Class; ATEX\/IECEx Zone 1 \u0026amp; 2 Approved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit Operating Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.0 kg (11.0 lbs net hardware weight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eControl Systems Integration \u0026amp; Diagnostic Capabilities\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell \u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e incorporates an illuminated high-contrast matrix display featuring immediate numerical readings, trend graphs, and intuitive diagnostic status icons. Using non-intrusive magnetic wands through the front window glass, operators complete zero\/span routines without opening the housing shell or requesting hot-work authorization.\u003c\/p\u003e\n\u003cp\u003eIntegrated microprocessors continuously evaluate internal circuit integrity, bridge supply voltages, and sensor balance. The unit transmits active fault parameters via 4-20mA current loop signaling and HART telemetry directly to Distributed Control Systems (DCS) or Safety Instrumented Systems (SIS):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFault 03 (Sensor Drift Fault):\u003c\/strong\u003e Catalytic sensor bridge balance dropped beyond zero calibration envelope limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFault 06 (Supply Voltage Low):\u003c\/strong\u003e Input operating power dropped below 16VDC minimum loop operating requirement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarning 14 (HART Communication Error):\u003c\/strong\u003e Local HART loop noise or improper termination impedance detected at field junction terminals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTarget Equipment \u0026amp; Industrial Application Scenarios\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrocarbon Refining Plants:\u003c\/strong\u003e Distillation towers, cracking units, crude storage manifolds, and pump seal monitoring stations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOffshore Production Platforms:\u003c\/strong\u003e FPSO process decks, natural gas compression modules, and riser landing zones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Turbine Generation Facilities:\u003c\/strong\u003e Fuel gas skids, enclosure purging spaces, and turbine valve control housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Distribution Terminals:\u003c\/strong\u003e Bulk solvent rail loading stations, valve manifold pits, and combustible solvent tank farms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eLogistics, Packaging \u0026amp; Warranty Terms\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Shipment Package:\u003c\/strong\u003e Factory-sealed \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e aluminum unit, CB1 catalytic bead sensor, local HART port assembly, and installation guide.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpress Global Dispatch:\u003c\/strong\u003e Confirmed orders ship within 24 to 48 hours via fast express carriers (FedEx, UPS, DHL).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Protection:\u003c\/strong\u003e Fully covered by a comprehensive 12-month operational replacement warranty starting from dispatch date.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB Field Engineering Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn our field commissioning experience across offshore oil platforms, configuring gas transmitters with a local HART interface like the \u003cstrong\u003eHoneywell \u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e yields massive labor savings during routine calibration cycles. On a recent offshore platform audit, field technicians previously had to remove explosion-proof housing covers to hook up HART handheld communicators, requiring hot-work permits, platform area isolation, and continuous portable gas sniffer monitoring.\u003c\/p\u003e\n\u003cp\u003eThe local HART port on the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e eliminates hot-work overhead by allowing direct IS-certified communicator plug-in right at the unit base. However, our engineering team advises field crews to verify that the protective rubber dust cap remains tightly sealed when the port is not in use. Salt fog accumulation inside an unsealed local HART port causes pin oxidation, leading to intermittent signal dropouts during diagnostic checks.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSelection Guide \u0026amp; Hardware Comparison\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSelecting the optimal configuration within the \u003cstrong\u003eHoneywell \u003cspan style=\"color: #0056b3;\"\u003eXNX Series\u003c\/span\u003e\u003c\/strong\u003e depends on target gas properties, environmental hazards, and site communication standards. Review the engineering comparison between this catalytic bead model and an optical infrared alternative below:\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth\u003e\u003cstrong\u003eParameter \/ Specification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e (Combustible LEL Model)\u003c\/th\u003e\n\u003cth\u003e\n\u003ca href=\"https:\/\/www.plcsparehub.com\/products\/xnx-amai-nnic1-honeywell-xnx-universal-transmitter-gas-detector-ir-co2\" target=\"_blank\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NNIC1\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e (Infrared CO2 Variant)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrimary Sensing Technology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCB1 Catalytic Bead Sensor Element\u003c\/td\u003e\n\u003ctd\u003eIC1 Infrared Absorption Cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTarget Atmospheric Gas\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFlammable Hydrocarbons (0-100% LEL Range)\u003c\/td\u003e\n\u003ctd\u003eCarbon Dioxide (0-5% Vol. Concentration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLocal HART Connection Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eH (Factory Installed Local IS HART Interface)\u003c\/td\u003e\n\u003ctd\u003eN (Standard Enclosure \/ No External Port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOxygen Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRequires \u0026gt;10% Ambient Oxygen to Detect Gas\u003c\/td\u003e\n\u003ctd\u003eOperates Independently of Ambient Oxygen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePoisoning Susceptibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVulnerable to Silicone Vapors \u0026amp; Sulfur Vapors\u003c\/td\u003e\n\u003ctd\u003eImmune to Silicone \u0026amp; Chemical Poisoning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eEngineering Selection Advice:\u003c\/strong\u003e For general combustible gas hazard protection across processing areas where local HART handheld diagnostic access is required, specify the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e\u003c\/strong\u003e. If your process loop requires monitoring toxic carbon dioxide accumulation or operates in completely oxygen-free inert gas blankets, select the infrared \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/xnx-amai-nnic1-honeywell-xnx-universal-transmitter-gas-detector-ir-co2\" target=\"_blank\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NNIC1\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e transmitter instead.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions \u0026amp; Practical Field Advice\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What key advantage does the \"H\" local HART option offer on the Honeywell \u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e during field commissioning?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The local HART interface provides an external Intrinsically Safe connection point on the enclosure exterior. Commissioning crews plug HART communicators directly into the unit to perform setup, zero adjustment, and diagnostic reads without opening the explosion-proof housing or obtaining hot-work permits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does catalytic bead poisoning occur on the CB1 sensor, and how can engineers prevent it?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Catalytic bead poisoning happens when silicone vapors, lead compounds, or sulfur species coat the active platinum bead, permanently degrading catalytic activity. Install hydrophobic\/silicone filter accessories or switch to optical IR transmitters in environments with known airborne silicone contaminants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the M25 cable entry ports on the \u003cspan style=\"color: #0056b3;\"\u003eXNX-AMAI-NHCB1\u003c\/span\u003e accept standard 3\/4 inch NPT conduit fittings?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No. M25 threads use metric spacing and cannot accept NPT fittings directly. Attempting to force NPT fittings strips casing threads and destroys the explosion-proof flame-path seal. Always use certified ATEX\/IECEx M25-to-NPT thread adapters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What cable loop resistance limit applies when driving 4-20mA signals with active HART telemetry?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Ensure total loop resistance stays between 250 Ohms and 600 Ohms. A minimum of 250 Ohms is strictly required for HART modem signal extraction, while exceeding 600 Ohms starves the transmitter voltage drive when loop current reaches 20mA full scale.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the recommended field testing routine for validating catalytic bead sensor responsiveness?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Perform a bump test every 3 months using a certified test gas cylinder (typically 50% LEL Methane in Air) fitted with a calibration flow housing adapter. Conduct full span recalibrations annually or whenever bump test response strays by more than 10% of target gas value.\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":45385357754550,"sku":"XNX-AMAI-NHCB1","price":163.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/XNX-AMSE-NHNNN_4_f7a04900-cfed-40a2-a6b2-0aa74612368c.jpg?v=1787803483","url":"https:\/\/www.plcsparehub.com\/es\/products\/xnx-amai-nhcb1-honeywell-xnx-gas-transmitter-local-hart","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}