{"product_id":"rki-gx3r-4-gas-monitor","title":"RKI GX3R 4 Gas Monitor — LEL, O2, H2S, CO (Factory Calibrated)","description":"\u003c!-- PRODUCT B0FP5TCPHS | tag personal-gas-detector | TODO: add matching Product Review + best-of guide links when those silo layers exist --\u003e\n\n\u003cdiv style=\"background:#1a1a1a;border-left:4px solid #ff9800;padding:14px 18px;margin:0 0 18px 0;color:#f5e6d3;font-size:0.95em;\"\u003e\n\u003cstrong style=\"color:#ffb74d;\"\u003eEditor’s note:\u003c\/strong\u003e the RKI GX3R 4 gas monitor is one of the instruments we curate in our \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e buyer’s hub. Compare it with the \u003ca href=\"\/products\/honeywell-bw-clip-h2s-monitor-bwc2-h\" title=\"Honeywell BW Clip H2S\"\u003eHoneywell BW Clip H2S\u003c\/a\u003e below before you order.\u003c\/div\u003e\n\n\u003ch2 id=\"top\"\u003eRKI GX3R 4 Gas Monitor — Compact Wearable LEL, O2, H2S \u0026amp; CO\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eRKI GX3R 4 gas monitor\u003c\/strong\u003e is one of the smallest wearable four-gas instruments available — a \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"personal gas detector\"\u003epersonal gas detector\u003c\/a\u003e reading LEL, O2, H2S and CO that ships factory-calibrated with a certificate, for workers who want full coverage in the lightest possible body.\u003c\/p\u003e\n\n\u003cp style=\"font-size:0.9em;color:#bdae9d;margin:10px 0 18px 0;\"\u003eJump to: \u003ca href=\"#features\" style=\"color:#ffb74d;\"\u003eFeatures\u003c\/a\u003e · \u003ca href=\"#specs\" style=\"color:#ffb74d;\"\u003eSpecs\u003c\/a\u003e · \u003ca href=\"#compatibility\" style=\"color:#ffb74d;\"\u003eWhat it detects\u003c\/a\u003e · \u003ca href=\"#comparison\" style=\"color:#ffb74d;\"\u003eComparison\u003c\/a\u003e · \u003ca href=\"#faq\" style=\"color:#ffb74d;\"\u003eFAQ\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe RKI GX3R is a compact, rechargeable wearable four-gas monitor (LEL, O2, H2S, CO) that ships factory-calibrated with a calibration certificate and includes datalogging.\u003c\/p\u003e\n\n\u003ch3 id=\"features\"\u003eKey features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eCompact, lightweight wearable reading LEL, O2, H2S and CO — one of the smallest 4-gas monitors\u003c\/li\u003e\n\u003cli\u003eShips factory-calibrated with a calibration certificate\u003c\/li\u003e\n\u003cli\u003eRechargeable Li-ion battery for full-shift use\u003c\/li\u003e\n\u003cli\u003eVisual, audible and vibration alarms\u003c\/li\u003e\n\u003cli\u003eIncludes a carry bag and certificate out of the box\u003c\/li\u003e\n\u003cli\u003eRKI Instruments build with warranty support\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"display:flex;gap:14px;flex-wrap:wrap;margin:18px 0;\"\u003e\n\u003cdiv style=\"flex:1;min-width:240px;background:#1b3a2a;border:1px solid #4caf50;border-radius:6px;padding:14px 18px;\"\u003e\n\u003cstrong style=\"color:#81c784;\"\u003ePros\u003c\/strong\u003e\u003cul style=\"margin:8px 0 0 0;\"\u003e\n\u003cli\u003eVery compact and light for all-day wear\u003c\/li\u003e\n\u003cli\u003eFactory-calibrated with certificate included\u003c\/li\u003e\n\u003cli\u003eRechargeable Li-ion\u003c\/li\u003e\n\u003cli\u003eTriple alarm modes\u003c\/li\u003e\n\u003cli\u003eDatalogging for records\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:240px;background:#3a1e1e;border:1px solid #ef5350;border-radius:6px;padding:14px 18px;\"\u003e\n\u003cstrong style=\"color:#e57373;\"\u003eCons\u003c\/strong\u003e\u003cul style=\"margin:8px 0 0 0;\"\u003e\n\u003cli\u003ePremium price\u003c\/li\u003e\n\u003cli\u003eNewer listing with limited public review history\u003c\/li\u003e\n\u003cli\u003eDiffusion only (no pump)\u003c\/li\u003e\n\u003cli\u003eNo VOC\/PID coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 id=\"specs\"\u003eSpecifications\u003c\/h3\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;margin:14px 0;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#2a2a2a;\"\u003e\n\u003cth style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;text-align:left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003eGases detected\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eLEL combustibles, O2, H2S, CO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003eForm factor\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eCompact wearable (one of the smallest 4-gas)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eRechargeable Li-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003eAlarms\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eVisual, audible \u0026amp; vibration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003eCalibration\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eFactory-calibrated; calibration certificate included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003eIncluded\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eCarry bag \u0026amp; certificate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003eSensors\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eCatalytic LEL + electrochemical O2\/H2S\/CO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003eDatalogging\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003ch3\u003eWhere the RKI GX3R fits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eConfined-space entry\u003c\/li\u003e\n\u003cli\u003eUtilities and field service\u003c\/li\u003e\n\u003cli\u003eOil-and-gas spot monitoring\u003c\/li\u003e\n\u003cli\u003eIndustrial maintenance\u003c\/li\u003e\n\u003cli\u003eCrews wanting the smallest wearable 4-gas\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat the RKI GX3R detects (and what it doesn’t)\u003c\/h2\u003e\n\n\u003cp\u003eIt detects \u003cstrong\u003eLEL combustibles, O2, H2S and CO\u003c\/strong\u003e — the confined-space set. It does not read VOCs, CO2 or specific toxics; those need a PID or dedicated sensor. It is diffusion, so pre-entry sampling needs a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e pump instrument. Among wearables, compare it with the serviceable \u003ca href=\"\/products\/bw-gasalertmicroclip-xl-4-gas-detector\" title=\"BW GasAlertMicroClip XL\"\u003eBW GasAlertMicroClip XL\u003c\/a\u003e and the sealed \u003ca href=\"\/products\/honeywell-bw-clip4-4-gas-detector\" title=\"BW Clip4\"\u003eBW Clip4\u003c\/a\u003e. It ships factory-calibrated; bump-test before use and recalibrate on schedule.\u003c\/p\u003e\n\n\u003cp\u003eCross-shopping? This unit sits in our \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e hub alongside \u003ca href=\"\/products\/honeywell-bw-clip-h2s-monitor-bwc2-h\" title=\"Honeywell BW Clip H2S\"\u003eHoneywell BW Clip H2S\u003c\/a\u003e, \u003ca href=\"\/products\/honeywell-bw-clip-co-monitor-bwc2-m\" title=\"Honeywell BW Clip CO\"\u003eHoneywell BW Clip CO\u003c\/a\u003e, \u003ca href=\"\/products\/honeywell-bw-clip-o2-monitor-bwc2-x\" title=\"Honeywell BW Clip O2\"\u003eHoneywell BW Clip O2\u003c\/a\u003e, \u003ca href=\"\/products\/toptes-ct-580-co-detector\" title=\"TopTes CT-580 CO\"\u003eTopTes CT-580 CO\u003c\/a\u003e. For other gas-detection form factors see \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e, \u003ca href=\"\/collections\/fixed-gas-detection-systems\" title=\"Fixed Gas Detection Systems\"\u003eFixed Gas Detection Systems\u003c\/a\u003e, \u003ca href=\"\/collections\/area-gas-monitors\" title=\"Area \u0026amp; Transportable Gas Monitors\"\u003eArea \u0026amp; Transportable Gas Monitors\u003c\/a\u003e, or browse the full \u003ca href=\"\/collections\/gas-detectors\" title=\"Gas Detectors\"\u003eGas Detectors\u003c\/a\u003e range.\u003c\/p\u003e\n\n\u003ch2 id=\"comparison\"\u003eWhere the RKI GX3R fits among wearable 4-gas monitors\u003c\/h2\u003e\n\n\u003cp\u003eThe GX3R is RKI’s ultra-compact wearable four-gas, shipped factory-calibrated with a certificate. Against the Honeywell BW wearables, it emphasises small size; the \u003ca href=\"\/products\/bw-gasalertmicroclip-xl-4-gas-detector\" title=\"GasAlertMicroClip XL\"\u003eGasAlertMicroClip XL\u003c\/a\u003e emphasises datalogging and docking automation, while the \u003ca href=\"\/products\/honeywell-bw-clip4-4-gas-detector\" title=\"BW Clip4\"\u003eBW Clip4\u003c\/a\u003e is sealed and 2-year maintenance-free.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eChoose the \u003cstrong\u003eRKI GX3R\u003c\/strong\u003e for the smallest, lightest wearable 4-gas with a calibration certificate in the box.\u003c\/li\u003e\n\u003cli\u003ePick the \u003ca href=\"\/products\/bw-gasalertmicroclip-xl-4-gas-detector\" title=\"GasAlertMicroClip XL\"\u003eGasAlertMicroClip XL\u003c\/a\u003e for datalogging and docking automation.\u003c\/li\u003e\n\u003cli\u003ePick the \u003ca href=\"\/products\/honeywell-bw-clip4-4-gas-detector\" title=\"BW Clip4\"\u003eBW Clip4\u003c\/a\u003e for sealed 2-year zero-maintenance operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"faq\"\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat gases does the RKI GX3R detect?\u003c\/h3\u003e\u003cp\u003eLEL combustibles, O2, H2S and CO — the confined-space four-gas set. For VOCs you need a PID; see the \u003ca href=\"\/collections\/gas-detectors\" title=\"Gas Detectors\"\u003eGas Detectors\u003c\/a\u003e range.\u003c\/p\u003e\n\u003ch3\u003eDoes the GX3R come calibrated?\u003c\/h3\u003e\u003cp\u003eYes — it ships factory-calibrated with a calibration certificate, plus a carry bag. Bump-test before use and recalibrate on schedule.\u003c\/p\u003e\n\u003ch3\u003eWhy choose the GX3R over other wearables?\u003c\/h3\u003e\u003cp\u003eSize — it is one of the smallest and lightest four-gas monitors, which makes all-day wear more comfortable while still covering all four gases.\u003c\/p\u003e\n\u003ch3\u003eIs the RKI GX3R rechargeable?\u003c\/h3\u003e\u003cp\u003eYes — it uses a rechargeable Li-ion battery sized for full-shift use; recharge between shifts.\u003c\/p\u003e\n\u003ch3\u003eHow does it compare to the BW GasAlertMicroClip XL?\u003c\/h3\u003e\u003cp\u003eBoth are serviceable rechargeable 4-gas wearables; the GX3R is smaller, while the \u003ca href=\"\/products\/bw-gasalertmicroclip-xl-4-gas-detector\" title=\"MicroClip XL\"\u003eMicroClip XL\u003c\/a\u003e is a longer-established platform with broad docking support.\u003c\/p\u003e\n\u003ch3\u003eIs it good for confined-space entry?\u003c\/h3\u003e\u003cp\u003eYes for personal monitoring. Pre-entry sampling of a sealed space still requires a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e pump instrument.\u003c\/p\u003e\n\u003ch3\u003eDoes it log data?\u003c\/h3\u003e\u003cp\u003eYes — it includes datalogging for compliance records, downloadable per RKI's software\/dock.\u003c\/p\u003e\n\u003ch3\u003eDoes it have a pump?\u003c\/h3\u003e\u003cp\u003eThis is the diffusion model. For remote sample-draw before entry, use a pump-equipped \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e monitor.\u003c\/p\u003e\n\u003ch3\u003eWhat alarms does it have?\u003c\/h3\u003e\u003cp\u003eVisual, audible and vibration alarms trigger when any of the four gases exceeds its set point.\u003c\/p\u003e\n\u003ch3\u003eWhat does it not detect?\u003c\/h3\u003e\u003cp\u003eVOCs, CO2 and specific toxics like chlorine or ammonia are outside its range; use a PID or dedicated sensor for those.\u003c\/p\u003e\n\u003ch3\u003eIs it in stock and how does it ship?\u003c\/h3\u003e\u003cp\u003eUse the Amazon buy button for live availability and delivery timing through our fulfillment partner.\u003c\/p\u003e\n\u003ch3\u003eDoes it include a warranty?\u003c\/h3\u003e\u003cp\u003eThe listing notes factory calibration and warranty support from RKI; confirm current warranty terms with the manufacturer for your purchase.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#1a1a1a;border:1px solid #3a3a3a;border-radius:6px;padding:16px 18px;margin:22px 0;\"\u003e\n\u003cp style=\"margin:0 0 10px 0;color:#f5e6d3;\"\u003eReady to order the \u003cstrong\u003eRKI GX3R 4 gas monitor\u003c\/strong\u003e? Add it to your cart above, or check the current Amazon price below. Compare it against the rest of our \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e lineup before you buy.\u003c\/p\u003e\n\u003cp style=\"display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:0;\"\u003e\u003ca href=\"https:\/\/www.amazon.com\/dp\/B0FP5TCPHS?tag=wcsafety04-20\" rel=\"sponsored nofollow noopener\" target=\"_blank\" style=\"display:inline-block;background:#FFD814;color:#0F1111;padding:13px 26px;text-decoration:none;font-weight:bold;border-radius:4px;border:1px solid #FCD200;\"\u003eCHECK PRICE ON AMAZON →\u003c\/a\u003e\u003cspan style=\"font-size:0.8em;color:#bdae9d;\"\u003eAs an Amazon Associate, WC Safety earns from qualifying purchases.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background:#1a2733;border:1px dashed #4fc3f7;padding:16px 20px;margin:30px 0 18px 0;color:#cfd8dc;font-size:0.92em;\"\u003e\n  \u003cstrong style=\"color:#4fc3f7;\"\u003eWhy trust this RKI Instruments page?\u003c\/strong\u003e WC Safety is an independent industrial safety-equipment retailer serving safety managers, procurement teams and field supervisors. The specifications here are taken from the manufacturer’s published listing for RKI GX3R and framed against \u003ca href=\"https:\/\/www.osha.gov\/laws-regs\/regulations\/standardnumber\/1910\/1910.146\" rel=\"noopener\" target=\"_blank\" style=\"color:#4fc3f7;\"\u003eOSHA 29 CFR 1910.146\u003c\/a\u003e and \u003ca href=\"https:\/\/www.osha.gov\/annotated-pels\" rel=\"noopener\" target=\"_blank\" style=\"color:#4fc3f7;\"\u003eOSHA Permissible Exposure Limits\u003c\/a\u003e. Disclosed: WC Safety earns Amazon affiliate commissions on outbound clicks; that does not influence the specs shown or our lineup.\n\u003c\/div\u003e\n\u003cdiv style=\"background:#1a2733;border-left:4px solid #4fc3f7;padding:18px 22px;margin:18px 0;color:#cfd8dc;font-size:0.92em;\"\u003e\n  \u003cstrong style=\"color:#4fc3f7;\"\u003eBy Steven Eaton, WC Safety Editorial\u003c\/strong\u003e — Industrial safety-equipment desk · specialization: atmospheric monitoring, gas detection and instrument selection.\u003cbr\u003e\n  \u003cstrong\u003eLast updated:\u003c\/strong\u003e \u003ctime datetime=\"2026-06-22\"\u003eJune 22, 2026\u003c\/time\u003e · \u003cstrong\u003eSources reviewed:\u003c\/strong\u003e manufacturer product listing \u0026amp; specifications, OSHA 29 CFR 1910.146, OSHA Annotated PEL tables, ACGIH Threshold Limit Values.\u003cbr\u003e\n  \u003cstrong\u003eEditorial standard:\u003c\/strong\u003e \u003cem\u003eZero sponsored listings. No manufacturer input. Specs verified against the manufacturer’s published data.\u003c\/em\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#1a2733;border-left:4px solid #4fc3f7;padding:16px 20px;margin:18px 0;color:#cfd8dc;font-size:0.92em;\"\u003e\n  \u003cstrong style=\"color:#4fc3f7;\"\u003eHow this page is maintained.\u003c\/strong\u003e Specifications and pricing are reviewed against the manufacturer’s current listing and re-checked whenever the lineup changes. Gas-detection guidance follows \u003ca href=\"https:\/\/www.osha.gov\/laws-regs\/regulations\/standardnumber\/1910\/1910.146\" rel=\"noopener\" target=\"_blank\" style=\"color:#4fc3f7;\"\u003eOSHA 1910.146\u003c\/a\u003e and \u003ca href=\"https:\/\/www.osha.gov\/annotated-pels\" rel=\"noopener\" target=\"_blank\" style=\"color:#4fc3f7;\"\u003eOSHA PELs\u003c\/a\u003e, cross-referenced with ACGIH TLVs.\n\u003c\/div\u003e\n\u003cdiv style=\"background:#2a2520;border-left:4px solid #ff9800;padding:16px 20px;margin:18px 0;color:#f5e6d3;font-size:0.92em;\"\u003e\n  \u003cstrong style=\"color:#ffb74d;\"\u003eDisclosure.\u003c\/strong\u003e WC Safety participates in the Amazon Associates Program and earns commissions on qualifying purchases through outbound links on this page (tag wcsafety04-20). We are not sponsored by any instrument manufacturer. This page is buyer guidance, not medical, legal or regulatory advice — confirm gas-detection requirements for your site against the applicable OSHA standard and, for commercial monitoring programs, a Certified Industrial Hygienist (CIH).\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"Product\", \"@id\": \"https:\/\/wcsafety.com\/products\/rki-gx3r-4-gas-monitor#product\", \"name\": \"RKI GX3R 4 Gas Monitor — LEL, O2, H2S, CO (Factory Calibrated)\", \"description\": \"RKI GX3R 4 gas monitor — compact wearable LEL, O2, H2S \u0026 CO detector, factory-calibrated with certificate, rechargeable. Order at WC Safety.\", \"sku\": \"B0FP5TCPHS\", \"mpn\": \"GX3R\", \"image\": [\"https:\/\/wcsafety.com\/cdn\/shop\/products\/rki-gx3r-4-gas-monitor.jpg\"], \"brand\": {\"@type\": \"Brand\", \"name\": \"RKI Instruments\"}, \"category\": \"Personal Gas Detector\", \"isPartOf\": {\"@type\": \"CollectionPage\", \"@id\": \"https:\/\/wcsafety.com\/collections\/personal-gas-detectors#collection\", \"name\": \"Personal \u0026 Wearable Gas Detectors\", \"url\": \"https:\/\/wcsafety.com\/collections\/personal-gas-detectors\"}, \"isRelatedTo\": [{\"@type\": \"Product\", \"name\": \"Honeywell BW Clip H2S Monitor (BWC2-H)\", \"url\": \"https:\/\/wcsafety.com\/products\/honeywell-bw-clip-h2s-monitor-bwc2-h\"}, {\"@type\": \"Product\", \"name\": \"Honeywell BW Clip CO Monitor (BWC2-M)\", \"url\": \"https:\/\/wcsafety.com\/products\/honeywell-bw-clip-co-monitor-bwc2-m\"}, {\"@type\": \"Product\", \"name\": \"Honeywell BW Clip O2 Monitor (BWC2-X)\", \"url\": \"https:\/\/wcsafety.com\/products\/honeywell-bw-clip-o2-monitor-bwc2-x\"}, {\"@type\": \"Product\", \"name\": \"TopTes CT-580 CO Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/toptes-ct-580-co-detector\"}, {\"@type\": \"Product\", \"name\": \"BW GasAlertMicroClip XL 4 Gas Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/bw-gasalertmicroclip-xl-4-gas-detector\"}, {\"@type\": \"Product\", \"name\": \"Honeywell BW Clip4 4 Gas Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/honeywell-bw-clip4-4-gas-detector\"}], \"offers\": {\"@type\": \"Offer\", \"url\": \"https:\/\/wcsafety.com\/products\/rki-gx3r-4-gas-monitor\", \"priceCurrency\": \"USD\", \"price\": \"640.00\", \"availability\": \"https:\/\/schema.org\/InStock\", \"seller\": {\"@type\": \"Organization\", \"name\": \"WC Safety\"}}}, {\"@type\": \"BreadcrumbList\", \"@id\": \"https:\/\/wcsafety.com\/products\/rki-gx3r-4-gas-monitor#breadcrumb\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/wcsafety.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Gas Detectors\", \"item\": \"https:\/\/wcsafety.com\/collections\/gas-detectors\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Personal \u0026 Wearable Gas Detectors\", \"item\": \"https:\/\/wcsafety.com\/collections\/personal-gas-detectors\"}, {\"@type\": \"ListItem\", \"position\": 4, \"name\": \"RKI GX3R 4 Gas Monitor — LEL, O2, H2S, CO (Factory Calibrated)\"}]}, {\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What gases does the RKI GX3R detect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"LEL combustibles, O2, H2S and CO — the confined-space four-gas set. For VOCs you need a PID; see the Gas Detectors range.\"}}, {\"@type\": \"Question\", \"name\": \"Does the GX3R come calibrated?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — it ships factory-calibrated with a calibration certificate, plus a carry bag. Bump-test before use and recalibrate on schedule.\"}}, {\"@type\": \"Question\", \"name\": \"Why choose the GX3R over other wearables?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Size — it is one of the smallest and lightest four-gas monitors, which makes all-day wear more comfortable while still covering all four gases.\"}}, {\"@type\": \"Question\", \"name\": \"Is the RKI GX3R rechargeable?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — it uses a rechargeable Li-ion battery sized for full-shift use; recharge between shifts.\"}}, {\"@type\": \"Question\", \"name\": \"How does it compare to the BW GasAlertMicroClip XL?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Both are serviceable rechargeable 4-gas wearables; the GX3R is smaller, while the MicroClip XL is a longer-established platform with broad docking support.\"}}, {\"@type\": \"Question\", \"name\": \"Is it good for confined-space entry?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes for personal monitoring. 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