{"product_id":"honeywell-bw-clip4-4-gas-detector","title":"Honeywell BW Clip4 4 Gas Detector — 2-Year Maintenance-Free (O2, LEL, CO, H2S)","description":"\u003c!-- PRODUCT B072MKBNL1 | 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 BW Clip4 4 gas detector 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\"\u003eHoneywell BW Clip4 4 Gas Detector — 2-Year Maintenance-Free Wearable\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eBW Clip4 4 gas detector\u003c\/strong\u003e brings the BW Clip’s zero-maintenance philosophy to all four confined-space gases — a \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"personal gas detector\"\u003epersonal gas detector\u003c\/a\u003e that runs two years with no charging, sensor swaps or docking. Issue it, use it, replace it at end of life.\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 Honeywell BW Clip4 is a 2-year maintenance-free wearable four-gas detector (O2, LEL, CO, H2S) with hibernate mode and no charging, sensor replacement or docking required.\u003c\/p\u003e\n\n\u003ch3 id=\"features\"\u003eKey features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eReads all four confined-space gases — O2, LEL, CO and H2S — with zero maintenance\u003c\/li\u003e\n\u003cli\u003eRuns 2 years with no charging, no battery swaps and no sensor replacement\u003c\/li\u003e\n\u003cli\u003eHibernate mode pauses the clock between deployments to stretch the 2-year life\u003c\/li\u003e\n\u003cli\u003eAudible, visual and vibrating alarms\u003c\/li\u003e\n\u003cli\u003eCompact, rugged Lexan\/TPE wearable body\u003c\/li\u003e\n\u003cli\u003eThe simplest 4-gas program — issue it, use it, replace at end of life\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\u003e4-gas coverage with zero maintenance\u003c\/li\u003e\n\u003cli\u003eNo charging, sensor swaps or docking required\u003c\/li\u003e\n\u003cli\u003eHibernate mode extends usable life\u003c\/li\u003e\n\u003cli\u003eTriple alarm modes\u003c\/li\u003e\n\u003cli\u003eLowest lifetime admin of any 4-gas\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\u003eHighest upfront price of the wearables\u003c\/li\u003e\n\u003cli\u003eNot serviceable — replace at end of life\u003c\/li\u003e\n\u003cli\u003eDiffusion only (no pump)\u003c\/li\u003e\n\u003cli\u003eNo VOC\/PID coverage; limited datalogging vs MicroClip XL\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;\"\u003eO2, LEL combustibles, CO, H2S\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;\"\u003eService life\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003e2 years continuous, maintenance-free\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, clip-on (4.7\" x 2.7\" x 1.3\")\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;\"\u003eSealed — no charging\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;\"\u003eAudible, visual \u0026amp; vibrating\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;\"\u003eSpecial feature\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eHibernate mode to extend deployment\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;\"\u003eElectrochemical (O2\/CO\/H2S) + catalytic bead (LEL)\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;\"\u003eHousing\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eLexan\/TPE, rugged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003ch3\u003eWhere the Honeywell BW Clip4 fits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eIntermittent confined-space entry\u003c\/li\u003e\n\u003cli\u003eContractors who want zero upkeep\u003c\/li\u003e\n\u003cli\u003eFleet programs avoiding charging logistics\u003c\/li\u003e\n\u003cli\u003eRemote sites without docking infrastructure\u003c\/li\u003e\n\u003cli\u003eBackup 4-gas units kept ready in hibernate\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat the Honeywell BW Clip4 detects (and what it doesn’t)\u003c\/h2\u003e\n\n\u003cp\u003eIt monitors \u003cstrong\u003eO2, LEL combustibles, CO and H2S\u003c\/strong\u003e — not VOCs, CO2 or specific toxics. 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. Compared with the serviceable \u003ca href=\"\/products\/bw-gasalertmicroclip-xl-4-gas-detector\" title=\"GasAlertMicroClip XL\"\u003eGasAlertMicroClip XL\u003c\/a\u003e, the Clip4 trades datalogging depth and rechargeability for zero maintenance. For single-hazard wear, the \u003ca href=\"\/products\/honeywell-bw-clip-h2s-monitor-bwc2-h\" title=\"BW Clip\"\u003eBW Clip\u003c\/a\u003e single-gas family costs far less. Bump-test before use; hibernate it between jobs to preserve the 2-year clock.\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\"\u003eHoneywell BW wearable 4-gas family compared\u003c\/h2\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;margin:14px 0;\"\u003e\n\u003ccaption style=\"color:#bdae9d;font-size:0.85em;text-align:left;padding:4px 0;\"\u003eHoneywell BW wearable 4-gas family (O2, LEL, CO, H2S)\u003c\/caption\u003e\n\u003cthead\u003e\u003ctr style=\"background:#2a2a2a;\"\u003e\n\u003cth style=\"color:#ffb74d;padding:9px;border:1px solid #3a3a3a;text-align:left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;padding:9px;border:1px solid #3a3a3a;text-align:left;\"\u003eService model\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;padding:9px;border:1px solid #3a3a3a;text-align:left;\"\u003eBump\/cal docking\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;padding:9px;border:1px solid #3a3a3a;text-align:left;\"\u003eNotable\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;padding:9px;border:1px solid #3a3a3a;text-align:left;\"\u003eStreet price\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e\u003ca href=\"\/products\/bw-gasalertmicroclip-xl-4-gas-detector\" title=\"GasAlertMicroClip XL\"\u003eGasAlertMicroClip XL\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eRechargeable, serviceable\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eIntelliDoX \/ MicroDock\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eDatalogging, motion alert\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e~$539\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#2a2520;\"\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e\u003cstrong\u003e\u003ca href=\"\/products\/honeywell-bw-clip4-4-gas-detector\" title=\"BW Clip4\"\u003eBW Clip4\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e2-yr maintenance-free\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eOptional\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eSealed, hibernate mode\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e~$820\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cul\u003e\n\u003cli\u003eChoose the \u003cstrong\u003eBW Clip4\u003c\/strong\u003e for the lowest-upkeep 4-gas wearable — no charging, no sensor swaps for 2 years.\u003c\/li\u003e\n\u003cli\u003ePick the \u003ca href=\"\/products\/bw-gasalertmicroclip-xl-4-gas-detector\" title=\"GasAlertMicroClip XL\"\u003eGasAlertMicroClip XL\u003c\/a\u003e if you need datalogging, rechargeability and docking automation.\u003c\/li\u003e\n\u003cli\u003eOnly one hazard? A single-gas \u003ca href=\"\/products\/honeywell-bw-clip-co-monitor-bwc2-m\" title=\"BW Clip\"\u003eBW Clip\u003c\/a\u003e is far cheaper per worker.\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 BW Clip4 detect?\u003c\/h3\u003e\u003cp\u003eO2, LEL combustibles, CO and H2S — the confined-space four-gas set, with no VOC or CO2 coverage (use a PID for those; see the \u003ca href=\"\/collections\/gas-detectors\" title=\"Gas Detectors\"\u003eGas Detectors\u003c\/a\u003e hub).\u003c\/p\u003e\n\u003ch3\u003eHow long does the BW Clip4 last?\u003c\/h3\u003e\u003cp\u003eTwo years of continuous use with no charging, no battery swaps and no sensor replacement. Hibernate mode pauses the clock between deployments to extend usable life.\u003c\/p\u003e\n\u003ch3\u003eHow is the Clip4 different from the GasAlertMicroClip XL?\u003c\/h3\u003e\u003cp\u003eThe Clip4 is sealed and 2-year maintenance-free; the \u003ca href=\"\/products\/bw-gasalertmicroclip-xl-4-gas-detector\" title=\"MicroClip XL\"\u003eMicroClip XL\u003c\/a\u003e is rechargeable and serviceable with deeper datalogging and docking automation.\u003c\/p\u003e\n\u003ch3\u003eDo I need to charge the BW Clip4?\u003c\/h3\u003e\u003cp\u003eNo — it is sealed with no charging required for its full 2-year life, which removes charging logistics from your program.\u003c\/p\u003e\n\u003ch3\u003eWhat is hibernate mode?\u003c\/h3\u003e\u003cp\u003eHibernate pauses the 2-year service clock when the unit is not in use, so intermittent users get more usable life from the sealed battery.\u003c\/p\u003e\n\u003ch3\u003eDo I still bump-test the Clip4?\u003c\/h3\u003e\u003cp\u003eYes — bump-test before use to confirm sensors and alarms respond, even though no sensor or battery service is needed.\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 needs 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 have a pump?\u003c\/h3\u003e\u003cp\u003eNo — it is diffusion. For remote sample-draw, 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\u003eAudible, visual and vibrating 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\u003eWho should buy the BW Clip4 over a single-gas clip?\u003c\/h3\u003e\u003cp\u003eWorkers facing several gases who want zero upkeep. If only one hazard applies, a single-gas \u003ca href=\"\/products\/honeywell-bw-clip-h2s-monitor-bwc2-h\" title=\"BW Clip\"\u003eBW Clip\u003c\/a\u003e is more economical per worker.\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\u003eBW Clip4 4 gas detector\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\/B072MKBNL1?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 Honeywell BW 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 Honeywell BW Clip4 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\/honeywell-bw-clip4-4-gas-detector#product\", \"name\": \"Honeywell BW Clip4 4 Gas Detector — 2-Year Maintenance-Free (O2, LEL, CO, H2S)\", \"description\": \"BW Clip4 4 gas detector — 2-year maintenance-free wearable O2, LEL, CO \u0026 H2S monitor, no charging or sensor swaps. 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