{"product_id":"forensics-4-gas-data-logger-monitor","title":"Forensics 4 Gas Data Logger Monitor — Built-in Pump, Graphing (O2, CO, H2S, LEL)","description":"\u003c!-- PRODUCT B0DM712D9P | tag area-gas-monitor | 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 Forensics 4 gas data logger monitor is one of the instruments we curate in our \u003ca href=\"\/collections\/area-gas-monitors\" title=\"Area \u0026amp; Transportable Gas Monitors\"\u003eArea \u0026amp; Transportable Gas Monitors\u003c\/a\u003e buyer’s hub. Compare it with the \u003ca href=\"\/products\/forensics-4-gas-pump-monitor-datalogging\" title=\"Forensics 4 Gas Pump Monitor\"\u003eForensics 4 Gas Pump Monitor\u003c\/a\u003e below before you order.\u003c\/div\u003e\n\n\u003ch2 id=\"top\"\u003eForensics 4 Gas Data Logger Monitor — Transportable Job-Site Monitoring\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eForensics 4 gas data logger monitor\u003c\/strong\u003e is the larger, datalogging-focused transportable in the family — an \u003ca href=\"\/collections\/area-gas-monitors\" title=\"area and transportable gas monitor\"\u003earea and transportable gas monitor\u003c\/a\u003e you place at a worksite to monitor oxygen (O2), combustible gas (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S) continuously with full computer datalogging for the record.\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 Forensics 4 Gas Data Logger Monitor is a larger transportable, NIST-calibrated continuous monitor for O2, CO, H2S and LEL with a built-in pump, color graphing display and full computer datalogging.\u003c\/p\u003e\n\n\u003ch3 id=\"features\"\u003eKey features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eLarger transportable unit monitoring oxygen (O2), combustible gas (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S) continuously with a built-in pump\u003c\/li\u003e\n\u003cli\u003eColor display with live graphing for trend visibility during a job\u003c\/li\u003e\n\u003cli\u003eFull computer datalogging for detailed exposure records\u003c\/li\u003e\n\u003cli\u003eUSA NIST-traceable calibration\u003c\/li\u003e\n\u003cli\u003eBuilt for extended placed monitoring of a worksite zone\u003c\/li\u003e\n\u003cli\u003eAudible and visual alarms\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\u003eExtended computer datalogging\u003c\/li\u003e\n\u003cli\u003eLarger transportable form for job-site placement\u003c\/li\u003e\n\u003cli\u003eBuilt-in pump + color graphing\u003c\/li\u003e\n\u003cli\u003eNIST-traceable calibration\u003c\/li\u003e\n\u003cli\u003eDetailed records for compliance\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 price in the transportable family\u003c\/li\u003e\n\u003cli\u003eNot a wireless-mesh networked area monitor\u003c\/li\u003e\n\u003cli\u003eHeavier (3.1 lb)\u003c\/li\u003e\n\u003cli\u003eElectrochemical sensors and pump need upkeep\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, CO, H2S, LEL combustibles\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;\"\u003eSampling\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eBuilt-in pump (sample-draw)\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;\"\u003eDisplay\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eColor with live graphing\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;\"\u003eComputer datalogging\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;\"\u003eUSA NIST-traceable\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\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eLarger transportable unit\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;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003e3.1 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003ch3\u003eWhere the Forensics 4 Gas Data Logger fits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eExtended turnaround and shutdown monitoring\u003c\/li\u003e\n\u003cli\u003ePlaced continuous job-site coverage\u003c\/li\u003e\n\u003cli\u003eDatalogged compliance records for a task\u003c\/li\u003e\n\u003cli\u003eConfined-space attendant monitoring\u003c\/li\u003e\n\u003cli\u003eEnvironmental\/spill response logging\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat the Forensics 4 Gas Data Logger detects (and what it doesn’t)\u003c\/h2\u003e\n\n\u003cp\u003eIt monitors oxygen (O2), combustible gas (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S) with a built-in pump and full computer datalogging — built for extended placed monitoring of a zone with detailed records. Like the rest of the family it is a single transportable unit, \u003cstrong\u003enot\u003c\/strong\u003e a wireless-mesh networked area monitor; for a multi-zone perimeter (AreaRAE\/Radius class) distributor sourcing is required. It does not read VOCs or specific toxics. For permanent coverage use a \u003ca href=\"\/collections\/fixed-gas-detection-systems\" title=\"Fixed Gas Detection Systems\"\u003eFixed Gas Detection Systems\u003c\/a\u003e system; for per-worker wear a \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e clip; for a lighter carried unit see \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e.\u003c\/p\u003e\u003cp style=\"background:#1a2733;border-left:4px solid #4fc3f7;padding:12px 16px;color:#cfd8dc;font-size:0.92em;\"\u003e\u003cstrong style=\"color:#4fc3f7;\"\u003eNote on wireless area monitors:\u003c\/strong\u003e true wireless-mesh area monitors (the AreaRAE, Industrial Scientific Radius and RAE MeshGuard class) are sold through industrial distributors, not retail. The instruments here are transportable continuous monitors you place at the hazard for the length of a job — for a networked multi-zone perimeter, contact us about distributor-sourced wireless area monitors.\u003c\/p\u003e\n\n\u003cp\u003eCross-shopping? This unit sits in our \u003ca href=\"\/collections\/area-gas-monitors\" title=\"Area \u0026amp; Transportable Gas Monitors\"\u003eArea \u0026amp; Transportable Gas Monitors\u003c\/a\u003e hub alongside \u003ca href=\"\/products\/forensics-4-gas-pump-monitor-datalogging\" title=\"Forensics 4 Gas Pump Monitor\"\u003eForensics 4 Gas Pump Monitor\u003c\/a\u003e, \u003ca href=\"\/products\/forensics-detectors-4-gas-monitor-with-pump\" title=\"Forensics 4 Gas Monitor + Pump\"\u003eForensics 4 Gas Monitor + Pump\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\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e, \u003ca href=\"\/collections\/fixed-gas-detection-systems\" title=\"Fixed Gas Detection Systems\"\u003eFixed Gas Detection Systems\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\"\u003eForensics transportable continuous-monitoring 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;\"\u003eForensics transportable continuous-monitoring family (O2, CO, H2S, LEL, NIST-calibrated)\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;\"\u003eForm\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;padding:9px;border:1px solid #3a3a3a;text-align:left;\"\u003eDatalogging\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;padding:9px;border:1px solid #3a3a3a;text-align:left;\"\u003eBest for\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\/forensics-detectors-4-gas-monitor-with-pump\" title=\"4 Gas + Pump\"\u003e4 Gas + Pump\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eHandheld pump\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eEvent log\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003ePre-entry + spot continuous\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e~$299\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e\u003ca href=\"\/products\/forensics-4-gas-pump-monitor-datalogging\" title=\"4 Gas Pump + Datalogging\"\u003e4 Gas Pump + Datalogging\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eHandheld pump\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eColor graphing log\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003ePlaced continuous monitoring\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e~$595\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\/forensics-4-gas-data-logger-monitor\" title=\"4 Gas Data Logger\"\u003e4 Gas Data Logger\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eLarger transportable\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eComputer datalogging\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003eExtended job-site monitoring\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:9px;border:1px solid #3a3a3a;\"\u003e~$1,399\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\u003e4 Gas Data Logger\u003c\/strong\u003e for extended placed monitoring with full computer datalogging and a larger transportable body.\u003c\/li\u003e\n\u003cli\u003eFor a lighter, lower-cost continuous monitor, the \u003ca href=\"\/products\/forensics-4-gas-pump-monitor-datalogging\" title=\"4 Gas Pump Monitor\"\u003e4 Gas Pump Monitor\u003c\/a\u003e covers most jobs.\u003c\/li\u003e\n\u003cli\u003eFor pre-entry-focused use, the \u003ca href=\"\/products\/forensics-detectors-4-gas-monitor-with-pump\" title=\"4 Gas Monitor + Pump\"\u003e4 Gas Monitor + Pump\u003c\/a\u003e is the value pump option.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"faq\"\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eIs the Forensics 4 gas data logger an area monitor?\u003c\/h3\u003e\u003cp\u003eIt is a larger transportable continuous monitor for placed job-site monitoring — an area-monitoring use. It is not a wireless-mesh networked monitor; for that class see the distributor note in the \u003ca href=\"\/collections\/area-gas-monitors\" title=\"Area \u0026amp; Transportable Gas Monitors\"\u003eArea \u0026amp; Transportable Gas Monitors\u003c\/a\u003e hub.\u003c\/p\u003e\n\u003ch3\u003eWhat gases does it monitor?\u003c\/h3\u003e\u003cp\u003eIt monitors oxygen (O2), combustible gas (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S) with a built-in pump. It does not read VOCs, CO2 or specific toxics.\u003c\/p\u003e\n\u003ch3\u003eWhat datalogging does it offer?\u003c\/h3\u003e\u003cp\u003eFull computer datalogging plus a color display with live graphing, giving you detailed records of a job's exposure over time for compliance.\u003c\/p\u003e\n\u003ch3\u003eHow is it different from the standard pump monitor?\u003c\/h3\u003e\u003cp\u003eIt is a larger, higher-tier transportable unit focused on extended datalogging; the \u003ca href=\"\/products\/forensics-4-gas-pump-monitor-datalogging\" title=\"4 Gas Pump Monitor\"\u003e4 Gas Pump Monitor\u003c\/a\u003e is lighter and lower cost for most jobs.\u003c\/p\u003e\n\u003ch3\u003eCan it do pre-entry sampling?\u003c\/h3\u003e\u003cp\u003eYes — the built-in sample-draw pump lets you test a space before entry as well as monitor continuously during the work.\u003c\/p\u003e\n\u003ch3\u003eIs it good for turnarounds and shutdowns?\u003c\/h3\u003e\u003cp\u003eYes — its extended datalogging and transportable form suit long placed-monitoring tasks like turnarounds, with a record of the whole job.\u003c\/p\u003e\n\u003ch3\u003eIs it NIST calibrated?\u003c\/h3\u003e\u003cp\u003eYes — USA NIST-traceable calibration; bump-test before use and recalibrate on schedule.\u003c\/p\u003e\n\u003ch3\u003eCan it monitor a whole perimeter alone?\u003c\/h3\u003e\u003cp\u003eOne unit covers its zone. For a networked multi-zone perimeter use several units or a distributor-sourced wireless-mesh system; for permanent coverage a \u003ca href=\"\/collections\/fixed-gas-detection-systems\" title=\"Fixed Gas Detection Systems\"\u003eFixed Gas Detection Systems\u003c\/a\u003e system.\u003c\/p\u003e\n\u003ch3\u003eWhat alarms does it have?\u003c\/h3\u003e\u003cp\u003eAudible and visual 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. For VOC monitoring use a PID; see the \u003ca href=\"\/collections\/gas-detectors\" title=\"Gas Detectors\"\u003eGas Detectors\u003c\/a\u003e hub.\u003c\/p\u003e\n\u003ch3\u003eIs it in stock and how does it ship?\u003c\/h3\u003e\u003cp\u003eUse the Amazon buy button for current availability and delivery timing through our fulfillment partner.\u003c\/p\u003e\n\u003ch3\u003eDoes it require maintenance?\u003c\/h3\u003e\u003cp\u003eYes — keep the pump and probe clean, replace electrochemical sensors periodically, and recalibrate on schedule to keep readings and logs accurate.\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\u003eForensics 4 gas data logger 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\/area-gas-monitors\" title=\"Area \u0026amp; Transportable Gas Monitors\"\u003eArea \u0026amp; Transportable Gas Monitors\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\/B0DM712D9P?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 Forensics Detectors 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 Forensics 4 Gas Data Logger 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\/forensics-4-gas-data-logger-monitor#product\", \"name\": \"Forensics 4 Gas Data Logger Monitor — Built-in Pump, Graphing (O2, CO, H2S, LEL)\", \"description\": \"Forensics 4 gas data logger monitor — larger transportable O2, CO, H2S \u0026 LEL monitor with built-in pump, color graphing and datalogging. NIST-calibrated.\", \"sku\": \"B0DM712D9P\", \"mpn\": \"FD-4GDL\", \"image\": [\"https:\/\/wcsafety.com\/cdn\/shop\/products\/forensics-4-gas-data-logger-monitor.jpg\"], \"brand\": {\"@type\": \"Brand\", \"name\": \"Forensics Detectors\"}, \"category\": \"Area Gas Monitor\", \"isPartOf\": {\"@type\": \"CollectionPage\", \"@id\": \"https:\/\/wcsafety.com\/collections\/area-gas-monitors#collection\", \"name\": \"Area \u0026 Transportable Gas Monitors\", \"url\": \"https:\/\/wcsafety.com\/collections\/area-gas-monitors\"}, \"isRelatedTo\": [{\"@type\": \"Product\", \"name\": \"Forensics 4 Gas Monitor with Pump \u0026 Datalogging\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-4-gas-pump-monitor-datalogging\"}, {\"@type\": \"Product\", \"name\": \"Forensics Detectors 4 Gas Monitor with Pump\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-detectors-4-gas-monitor-with-pump\"}], \"offers\": {\"@type\": \"Offer\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-4-gas-data-logger-monitor\", \"priceCurrency\": \"USD\", \"price\": \"1399.00\", \"availability\": \"https:\/\/schema.org\/InStock\", \"seller\": {\"@type\": \"Organization\", \"name\": \"WC Safety\"}}}, {\"@type\": \"BreadcrumbList\", \"@id\": \"https:\/\/wcsafety.com\/products\/forensics-4-gas-data-logger-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\": \"Area \u0026 Transportable Gas Monitors\", \"item\": \"https:\/\/wcsafety.com\/collections\/area-gas-monitors\"}, {\"@type\": \"ListItem\", \"position\": 4, \"name\": \"Forensics 4 Gas Data Logger Monitor — Built-in Pump, Graphing (O2, CO, H2S, LEL)\"}]}, {\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the Forensics 4 gas data logger an area monitor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It is a larger transportable continuous monitor for placed job-site monitoring — an area-monitoring use. It is not a wireless-mesh networked monitor; for that class see the distributor note in the Area \u0026 Transportable Gas Monitors hub.\"}}, {\"@type\": \"Question\", \"name\": \"What gases does it monitor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It monitors oxygen (O2), combustible gas (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S) with a built-in pump. It does not read VOCs, CO2 or specific toxics.\"}}, {\"@type\": \"Question\", \"name\": \"What datalogging does it offer?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Full computer datalogging plus a color display with live graphing, giving you detailed records of a job's exposure over time for compliance.\"}}, {\"@type\": \"Question\", \"name\": \"How is it different from the standard pump monitor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It is a larger, higher-tier transportable unit focused on extended datalogging; the 4 Gas Pump Monitor is lighter and lower cost for most jobs.\"}}, {\"@type\": \"Question\", \"name\": \"Can it do pre-entry sampling?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — the built-in sample-draw pump lets you test a space before entry as well as monitor continuously during the work.\"}}, {\"@type\": \"Question\", \"name\": \"Is it good for turnarounds and shutdowns?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — its extended datalogging and transportable form suit long placed-monitoring tasks like turnarounds, with a record of the whole job.\"}}, {\"@type\": \"Question\", \"name\": \"Is it NIST calibrated?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — USA NIST-traceable calibration; bump-test before use and recalibrate on schedule.\"}}, {\"@type\": \"Question\", \"name\": \"Can it monitor a whole perimeter alone?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"One unit covers its zone. For a networked multi-zone perimeter use several units or a distributor-sourced wireless-mesh system; for permanent coverage a Fixed Gas Detection Systems system.\"}}, {\"@type\": \"Question\", \"name\": \"What alarms does it have?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Audible and visual alarms trigger when any of the four gases exceeds its set point.\"}}, {\"@type\": \"Question\", \"name\": \"What does it not detect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"VOCs, CO2 and specific toxics like chlorine or ammonia. For VOC monitoring use a PID; see the Gas Detectors hub.\"}}, {\"@type\": \"Question\", \"name\": \"Is it in stock and how does it ship?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use the Amazon buy button for current availability and delivery timing through our fulfillment partner.\"}}, {\"@type\": \"Question\", \"name\": \"Does it require maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — keep the pump and probe clean, replace electrochemical sensors periodically, and recalibrate on schedule to keep readings and logs accurate.\"}}]}, {\"@type\": \"Organization\", \"@id\": \"https:\/\/wcsafety.com\/#org\", \"name\": \"WC Safety\", \"url\": \"https:\/\/wcsafety.com\", \"logo\": \"https:\/\/wcsafety.com\/cdn\/shop\/files\/logo.png\"}, {\"@type\": \"Person\", \"@id\": \"https:\/\/wcsafety.com\/#editor\", \"name\": \"Steven Eaton\", \"jobTitle\": \"Editorial Lead\", \"worksFor\": {\"@id\": \"https:\/\/wcsafety.com\/#org\"}, \"knowsAbout\": [\"industrial gas detection\", \"atmospheric monitoring\", \"personal protective equipment\"]}, {\"@type\": \"Brand\", \"name\": \"Forensics Detectors\"}]}\n\u003c\/script\u003e","brand":"Forensics Detectors","offers":[{"title":"Default Title","offer_id":44266505764952,"sku":"B0DM712D9P","price":1399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/1900\/0920\/files\/81GpANeoJfL._AC_SL1500.jpg?v=1782123133","url":"https:\/\/wcsafety.com\/products\/forensics-4-gas-data-logger-monitor","provider":"WC Safety","version":"1.0","type":"link"}