{"product_id":"xnx-asmsi-rhnnn-honeywell-universal-transmitter","title":"XNX-ASMSI-RHNNN - Honeywell Universal Transmitter","description":"\u003ch2\u003e\u003cstrong\u003eXNX-ASMSI-RHNNN Universal Transmitter by Honeywell\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Honeywell – a global leader in industrial safety and sensing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003eXNX-ASMSI-RHNNN\u003c\/strong\u003e – part of the XNX Universal Transmitter family.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e HART® protocol over 4-20mA analog loop for stable signal transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproval:\u003c\/strong\u003e ATEX\/IEC certified (Approval A) for Zone 1 and Zone 2 hazardous areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure:\u003c\/strong\u003e 316 stainless steel (Material S) with 5 x M25 cable entries (Entry M).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Interface:\u003c\/strong\u003e mV version (Personality V) for milli-Volt sensors like MPD and Sensepoint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Type:\u003c\/strong\u003e Electrochemical H2S sensor (Range RHNNN) for toxic gas detection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptions:\u003c\/strong\u003e No relay (R=No), no local HART (N=No), no additional options (N=No).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 3.0 kg – lightweight for easy handling and mounting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -20°C to +55°C for reliable indoor and outdoor use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range:\u003c\/strong\u003e 0-100 ppm H2S (default) with 0.1 ppm resolution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinearity:\u003c\/strong\u003e ±2% of full scale for accurate and repeatable readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResponse Time:\u003c\/strong\u003e T90 \u0026lt; 25 seconds for rapid toxic gas alerts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMC Immunity:\u003c\/strong\u003e Complies with EN 61000-6-2 and EN 61000-6-4 standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs this transmitter compatible with 3-wire electrochemical sensors?\u003c\/strong\u003e Yes, the mV interface (Personality V) supports standard 3-wire electrochemical sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan I use this transmitter with a different gas sensor?\u003c\/strong\u003e The RHNNN range is factory-set for H2S. For other gases, please contact Honeywell for alternative configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the maximum cable length for the 4-20mA output?\u003c\/strong\u003e With HART®, we recommend up to 1000 meters using shielded twisted-pair cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes this unit include a relay output?\u003c\/strong\u003e No, this model (Option R=No) does not include a relay. Please choose the R option for relay functionality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the ambient humidity tolerance?\u003c\/strong\u003e It operates from 0 to 95% RH non-condensing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow do I perform a zero adjustment for the H2S sensor?\u003c\/strong\u003e Use the magnetic switch or HART® communicator to initiate zero calibration in fresh air.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs this unit SIL rated?\u003c\/strong\u003e The \u003cstrong\u003eXNX-ASMSI-RHNNN\u003c\/strong\u003e meets SIL 2 requirements for functional safety applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 0.9em; color: #555;\"\u003e© 2026 NexAuto Technology Limited. All rights reserved.\u003cbr\u003eOriginal Source: \u003ca href=\"https:\/\/www.nex-auto.com\/\"\u003ehttps:\/\/www.nex-auto.com\/\u003c\/a\u003e\u003cbr\u003eContact: \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e | Phone: \u003ca href=\"https:\/\/wa.me\/8615392429628\"\u003e+86 153 9242 9628\u003c\/a\u003e\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":48371503628546,"sku":"XNX-ASMSI-RHNNN","price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7280\/6146\/files\/XNX-ASMSI-RHNNN.jpg?v=1787539601","url":"https:\/\/www.nex-auto.com\/products\/xnx-asmsi-rhnnn-honeywell-universal-transmitter","provider":"NexAuto Technology Limited","version":"1.0","type":"link"}