{"product_id":"forensics-4-gas-pump-monitor-datalogging","title":"Forensics 4 Gas Pump Monitor — Datalogging, Color Display (O2, CO, H2S, LEL)","description":"\u003c!-- PRODUCT B07WKC4FTV | 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 pump 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-data-logger-monitor\" title=\"Forensics 4 Gas Data Logger\"\u003eForensics 4 Gas Data Logger\u003c\/a\u003e below before you order.\u003c\/div\u003e\n\n\u003ch2 id=\"top\"\u003eForensics 4 Gas Pump Monitor — Transportable Continuous Monitoring\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eForensics 4 gas pump monitor\u003c\/strong\u003e is a transportable continuous monitor with a built-in pump, color graphing and datalogging — an \u003ca href=\"\/collections\/area-gas-monitors\" title=\"area and transportable gas monitor\"\u003earea and transportable gas monitor\u003c\/a\u003e you set down at the hazard to watch oxygen (O2), combustible gas (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S) for the length of a job, or carry for pre-entry checks.\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 Pump Monitor is a transportable, NIST-calibrated continuous monitor for O2, CO, H2S and LEL with a built-in sample-draw pump, color graphing display and computer datalogging.\u003c\/p\u003e\n\n\u003ch3 id=\"features\"\u003eKey features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eMonitors oxygen (O2), combustible gas (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S) continuously with a built-in sample-draw pump\u003c\/li\u003e\n\u003cli\u003eColor display with live graphing to watch trends as you monitor a zone\u003c\/li\u003e\n\u003cli\u003eOn-board datalogging with computer download for records\u003c\/li\u003e\n\u003cli\u003eUSA NIST-traceable calibration\u003c\/li\u003e\n\u003cli\u003eSet it down at the hazard for continuous job-site monitoring, or carry it for pre-entry checks\u003c\/li\u003e\n\u003cli\u003eAudible, visual and vibration 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\u003eBuilt-in pump + datalogging\u003c\/li\u003e\n\u003cli\u003eColor live-graphing display\u003c\/li\u003e\n\u003cli\u003eNIST-traceable calibration\u003c\/li\u003e\n\u003cli\u003eDoubles as placed continuous monitor and portable\u003c\/li\u003e\n\u003cli\u003eComputer data download 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\u003eNot a wireless-mesh area monitor (single unit)\u003c\/li\u003e\n\u003cli\u003eNo networked multi-zone base station\u003c\/li\u003e\n\u003cli\u003eElectrochemical sensors need periodic replacement\u003c\/li\u003e\n\u003cli\u003ePump and probe need maintenance\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;\"\u003eYes — computer download\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;\"\u003eSensor\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eElectrochemical\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;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003e14.4 oz\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; vibration\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 Pump Monitor fits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003ePlaced continuous monitoring during a job\u003c\/li\u003e\n\u003cli\u003eConfined-space hole watch at the entry\u003c\/li\u003e\n\u003cli\u003eHot-work and turnaround monitoring\u003c\/li\u003e\n\u003cli\u003ePre-entry sampling (pump)\u003c\/li\u003e\n\u003cli\u003eDatalogged exposure records for a task\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat the Forensics 4 Gas Pump Monitor 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 logs the data — ideal for placing at a worksite for continuous coverage during a job, or carrying for pre-entry sampling. It is a single unit, \u003cstrong\u003enot\u003c\/strong\u003e a wireless-mesh area monitor: for a networked multi-zone perimeter (AreaRAE\/Radius class), distributor sourcing is required. It does not read VOCs or specific toxics. For permanent unattended 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 carried handheld 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-data-logger-monitor\" title=\"Forensics 4 Gas Data Logger\"\u003eForensics 4 Gas Data Logger\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 this \u003cstrong\u003e4 Gas Pump Monitor\u003c\/strong\u003e for placed continuous monitoring with color graphing and datalogging at a mid price.\u003c\/li\u003e\n\u003cli\u003eStep up to the \u003ca href=\"\/products\/forensics-4-gas-data-logger-monitor\" title=\"4 Gas Data Logger\"\u003e4 Gas Data Logger\u003c\/a\u003e for a larger transportable unit with extended computer datalogging.\u003c\/li\u003e\n\u003cli\u003eFor a lighter pre-entry-focused pump unit, the \u003ca href=\"\/products\/forensics-detectors-4-gas-monitor-with-pump\" title=\"4 Gas Monitor + Pump\"\u003e4 Gas Monitor + Pump\u003c\/a\u003e costs less.\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 pump monitor an area monitor?\u003c\/h3\u003e\u003cp\u003eIt is a transportable continuous monitor you place at a hazard for a job — an area-monitoring use. It is not a wireless-mesh networked area monitor; for that class, distributor-sourced units like AreaRAE are needed. See the \u003ca href=\"\/collections\/area-gas-monitors\" title=\"Area \u0026amp; Transportable Gas Monitors\"\u003eArea \u0026amp; Transportable Gas Monitors\u003c\/a\u003e hub note.\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 like chlorine.\u003c\/p\u003e\n\u003ch3\u003eDoes it log data?\u003c\/h3\u003e\u003cp\u003eYes — it has on-board datalogging with computer download and a color display with live graphing, so you can record and review a job's exposure trend.\u003c\/p\u003e\n\u003ch3\u003eCan I use it for confined-space hole watch?\u003c\/h3\u003e\u003cp\u003eYes — placed at the entry it provides continuous monitoring during entry, alongside the entrant's \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e clip and pre-entry testing with a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e instrument.\u003c\/p\u003e\n\u003ch3\u003eDoes it have a pump for 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 job.\u003c\/p\u003e\n\u003ch3\u003eHow is it different from the larger Data Logger model?\u003c\/h3\u003e\u003cp\u003eThe \u003ca href=\"\/products\/forensics-4-gas-data-logger-monitor\" title=\"4 Gas Data Logger\"\u003e4 Gas Data Logger\u003c\/a\u003e is a larger, higher-tier transportable unit with extended computer datalogging; this model is the lighter, lower-cost continuous monitor.\u003c\/p\u003e\n\u003ch3\u003eIs it NIST calibrated?\u003c\/h3\u003e\u003cp\u003eYes — it ships with USA NIST-traceable calibration; bump-test before use and recalibrate on schedule.\u003c\/p\u003e\n\u003ch3\u003eCan it cover a whole perimeter?\u003c\/h3\u003e\u003cp\u003eOne unit covers the zone where it sits. For a multi-zone perimeter you place several monitors or use a distributor-sourced wireless-mesh system; 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.\u003c\/p\u003e\n\u003ch3\u003eWhat alarms does it have?\u003c\/h3\u003e\u003cp\u003eAudible, visual 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. For VOC monitoring a PID is required; see the \u003ca href=\"\/collections\/gas-detectors\" title=\"Gas Detectors\"\u003eGas Detectors\u003c\/a\u003e hub for instrument types.\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 the pump need maintenance?\u003c\/h3\u003e\u003cp\u003eYes — keep the pump path and probe clean and check flow per the instructions so samples draw correctly during continuous monitoring.\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 pump 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\/B07WKC4FTV?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 Pump Monitor 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-pump-monitor-datalogging#product\", \"name\": \"Forensics 4 Gas Pump Monitor — Datalogging, Color Display (O2, CO, H2S, LEL)\", \"description\": \"Forensics 4 gas pump monitor — transportable continuous O2, CO, H2S \u0026 LEL monitor with built-in pump, color graphing and datalogging. NIST-calibrated.\", \"sku\": \"B07WKC4FTV\", \"mpn\": \"FD-4GP-DL\", \"image\": [\"https:\/\/wcsafety.com\/cdn\/shop\/products\/forensics-4-gas-pump-monitor-datalogging.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 Data Logger Monitor\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-4-gas-data-logger-monitor\"}, {\"@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-pump-monitor-datalogging\", \"priceCurrency\": \"USD\", \"price\": \"595.45\", \"availability\": \"https:\/\/schema.org\/InStock\", \"seller\": {\"@type\": \"Organization\", \"name\": \"WC Safety\"}}}, {\"@type\": \"BreadcrumbList\", \"@id\": \"https:\/\/wcsafety.com\/products\/forensics-4-gas-pump-monitor-datalogging#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 Pump Monitor — Datalogging, Color Display (O2, CO, H2S, LEL)\"}]}, {\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the Forensics 4 gas pump monitor an area monitor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It is a transportable continuous monitor you place at a hazard for a job — an area-monitoring use. It is not a wireless-mesh networked area monitor; for that class, distributor-sourced units like AreaRAE are needed. See the Area \u0026 Transportable Gas Monitors hub note.\"}}, {\"@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 like chlorine.\"}}, {\"@type\": \"Question\", \"name\": \"Does it log data?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — it has on-board datalogging with computer download and a color display with live graphing, so you can record and review a job's exposure trend.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use it for confined-space hole watch?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — placed at the entry it provides continuous monitoring during entry, alongside the entrant's Personal \u0026 Wearable Gas Detectors clip and pre-entry testing with a Portable Gas Detectors instrument.\"}}, {\"@type\": \"Question\", \"name\": \"Does it have a pump for 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 job.\"}}, {\"@type\": \"Question\", \"name\": \"How is it different from the larger Data Logger model?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 4 Gas Data Logger is a larger, higher-tier transportable unit with extended computer datalogging; this model is the lighter, lower-cost continuous monitor.\"}}, {\"@type\": \"Question\", \"name\": \"Is it NIST calibrated?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — it ships with USA NIST-traceable calibration; bump-test before use and recalibrate on schedule.\"}}, {\"@type\": \"Question\", \"name\": \"Can it cover a whole perimeter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"One unit covers the zone where it sits. For a multi-zone perimeter you place several monitors or use a distributor-sourced wireless-mesh system; for permanent coverage use a Fixed Gas Detection Systems system.\"}}, {\"@type\": \"Question\", \"name\": \"What alarms does it have?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Audible, visual and vibration 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. For VOC monitoring a PID is required; see the Gas Detectors hub for instrument types.\"}}, {\"@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 the pump need maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — keep the pump path and probe clean and check flow per the instructions so samples draw correctly during continuous monitoring.\"}}]}, {\"@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":44266505633880,"sku":"B07WKC4FTV","price":595.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/1900\/0920\/files\/71rtlJMgoPL._AC_SL1500.jpg?v=1782123129","url":"https:\/\/wcsafety.com\/products\/forensics-4-gas-pump-monitor-datalogging","provider":"WC Safety","version":"1.0","type":"link"}