{"title":"Ozone (O3) Gas Detectors","description":"\u003c!-- gas-type subcollection: ozone-gas-detectors | smart tag = ozone-detector --\u003e\n\n\u003ch2\u003eWhich ozone (O3) gas detector should you buy in 2026?\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eShort answer:\u003c\/strong\u003e For ozone, use a dedicated O3 monitor such as the \u003ca href=\"\/products\/ato-ozone-gas-detector-o3\" title=\"ATO Ozone Detector\"\u003eATO Ozone Detector\u003c\/a\u003e (0-50 ppm) — for ozone-generator rooms, water treatment and labs, where O3 is a strong oxidant toxic at very low concentrations.\u003c\/p\u003e\n\n\u003cp\u003eOzone (O3) is a strong oxidant that is toxic at very low concentrations and is generated intentionally for disinfection. It is a hazard in ozone-generator and water-treatment rooms, labs and food processing. O3 detection uses sensitive sensors that need periodic verification.\u003c\/p\u003e\n\n\u003cp\u003eThis is a gas-type collection under the \u003ca href=\"\/collections\/gas-detectors\" title=\"Gas Detectors\"\u003eGas Detectors\u003c\/a\u003e hub. Match the gas to the right form factor: \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e for carried checks, \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e for single-worker exposure, \u003ca href=\"\/collections\/fixed-gas-detection-systems\" title=\"Fixed Gas Detection Systems\"\u003eFixed Gas Detection Systems\u003c\/a\u003e for continuous plant monitoring, \u003ca href=\"\/collections\/area-gas-monitors\" title=\"Area \u0026amp; Transportable Gas Monitors\"\u003eArea \u0026amp; Transportable Gas Monitors\u003c\/a\u003e for job-site zones, and \u003ca href=\"\/collections\/gas-leak-detectors\" title=\"Gas Leak Detectors\"\u003eGas Leak Detectors\u003c\/a\u003e to pinpoint a leak source.\u003c\/p\u003e\n\n\u003ch2\u003eDetectors in this collection\u003c\/h2\u003e\n\n\u003cp\u003eThis collection gathers ozone instruments. The \u003ca href=\"\/products\/ato-ozone-gas-detector-o3\" title=\"ATO Ozone Detector\"\u003eATO Ozone Detector\u003c\/a\u003e reads 0-50 ppm on an LCD with alarms, for generator rooms and treatment areas. For the four atmospheric gases alongside ozone, pair it with a unit from \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cblockquote style=\"background:#1a1a1a;border-left:4px solid #ff9800;padding:14px 18px;margin:18px 0;color:#f5e6d3;\"\u003e\n\u003cstrong style=\"color:#ffb74d;\"\u003eEditor’s pick — a handheld ozone monitor\u003c\/strong\u003e\u003cbr\u003eThe \u003ca href=\"\/products\/ato-ozone-gas-detector-o3\" title=\"ATO Ozone Detector\"\u003eATO Ozone Detector\u003c\/a\u003e covers the O3 gap with a 0-50 ppm range and triple alarms — the practical pick for ozone-generator and water-treatment rooms. \u003cspan style=\"display:block;margin-top:6px;font-size:0.82em;color:#bdae9d;\"\u003eAs an Amazon Associate, WC Safety earns from qualifying purchases.\u003c\/span\u003e\u003cp style=\"margin-top:12px;\"\u003e\u003ca href=\"https:\/\/www.amazon.com\/s?k=ozone+gas+detector+o3\u0026amp;tag=wcsafety04-20\" rel=\"sponsored nofollow noopener\" target=\"_blank\" style=\"display:inline-block;background:#FFD814;color:#0F1111;padding:12px 22px;text-decoration:none;font-weight:bold;border-radius:4px;border:1px solid #FCD200;\"\u003eCHECK PRICES ON AMAZON →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\n\u003ch2\u003eHow to choose a ozone detector\u003c\/h2\u003e\n\n\u003ch3\u003eSensitive sensors\u003c\/h3\u003e\u003cp\u003eOzone sensors are sensitive and can drift; verify against a known source periodically and replace per the manufacturer's guidance.\u003c\/p\u003e\u003ch3\u003eRange and alarms\u003c\/h3\u003e\u003cp\u003eOzone is toxic at low ppm, so a low range with clear alarms is important around generators and treatment systems.\u003c\/p\u003e\u003ch3\u003eWhere it is used\u003c\/h3\u003e\u003cp\u003eOzone-generator and disinfection rooms, water and wastewater ozone treatment, labs and food processing.\u003c\/p\u003e\n\n\u003ch2\u003eOzone (O3) hazard, exposure limits \u0026amp; placement\u003c\/h2\u003e\n\n\u003cp\u003eThe OSHA Permissible Exposure Limit for ozone is 0.1 ppm as an 8-hour TWA; ACGIH lists action levels by workload. Ozone is slightly heavier than air. Because it is toxic at very low concentrations, low alarm set points and good ventilation around ozone systems are essential. Confirm current limits with \u003ca href=\"https:\/\/www.osha.gov\/annotated-pels\" rel=\"noopener\" target=\"_blank\" style=\"color:#4fc3f7;\"\u003eOSHA's annotated PEL tables\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2 id=\"faq\"\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhat detects ozone gas?\u003c\/h3\u003e\u003cp\u003eA dedicated O3 detector with an ozone-specific sensor — a standard 4-gas monitor does not cover ozone.\u003c\/p\u003e\n\u003ch3\u003eWhat is the OSHA limit for ozone?\u003c\/h3\u003e\u003cp\u003e0.1 ppm as an 8-hour TWA per the \u003ca href=\"https:\/\/www.osha.gov\/annotated-pels\" rel=\"noopener\" target=\"_blank\" style=\"color:#4fc3f7;\"\u003eOSHA PEL\u003c\/a\u003e; ACGIH lists action levels by workload.\u003c\/p\u003e\n\u003ch3\u003eWhere is ozone detection used?\u003c\/h3\u003e\u003cp\u003eOzone-generator and disinfection rooms, water and wastewater ozone treatment, laboratories, clean rooms and food processing.\u003c\/p\u003e\n\u003ch3\u003eWhy monitor ozone?\u003c\/h3\u003e\u003cp\u003eOzone is a strong oxidant, toxic at low concentrations, and is generated intentionally in disinfection — leaks and over-generation must be caught.\u003c\/p\u003e\n\u003ch3\u003eDo ozone sensors drift?\u003c\/h3\u003e\u003cp\u003eYes — ozone sensors are sensitive and can drift; verify against a known source periodically and replace per the manufacturer's guidance.\u003c\/p\u003e\n\u003ch3\u003eIs ozone heavier than air?\u003c\/h3\u003e\u003cp\u003eOzone is slightly heavier than air; place detectors near the breathing zone and around generator and treatment equipment.\u003c\/p\u003e\n\u003ch3\u003eCan I use it for confined-space entry?\u003c\/h3\u003e\u003cp\u003eOzone is one hazard; entry also needs O2, combustible and toxic testing with a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"portable 4-gas instrument\"\u003eportable 4-gas instrument\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003ePortable or fixed ozone detection?\u003c\/h3\u003e\u003cp\u003eHandheld units cover surveys and exposure; fixed ozone monitoring exists for generator and treatment rooms. See \u003ca href=\"\/collections\/fixed-gas-detection-systems\" title=\"Fixed Gas Detection Systems\"\u003eFixed Gas Detection Systems\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat does the ATO Ozone Detector cover?\u003c\/h3\u003e\u003cp\u003eThe \u003ca href=\"\/products\/ato-ozone-gas-detector-o3\" title=\"ATO Ozone Detector\"\u003eATO Ozone Detector\u003c\/a\u003e reads 0-50 ppm O3 on an LCD with audible, visual and vibration alarms.\u003c\/p\u003e\n\u003ch3\u003eHow dangerous is ozone exposure?\u003c\/h3\u003e\u003cp\u003eOzone is toxic at very low concentrations, irritating the respiratory tract, which is why the OSHA limit is just 0.1 ppm.\u003c\/p\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 ozone detector collection?\u003c\/strong\u003e WC Safety is an independent industrial safety-equipment retailer. This collection is curated on detection principle, gas coverage and certification, grounded in published OSHA standards and manufacturer data — not paid placement. Disclosed: we earn Amazon affiliate commissions on outbound links; that does not influence what we recommend.\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;\"\u003eCurated by Steven Eaton, WC Safety Editorial\u003c\/strong\u003e — Industrial safety-equipment desk · atmospheric monitoring and chemical-specific gas detection.\u003cbr\u003e\n\u003cstrong\u003eLast reviewed:\u003c\/strong\u003e \u003ctime datetime=\"2026-06-22\"\u003eJune 22, 2026\u003c\/time\u003e · \u003cstrong\u003eSources:\u003c\/strong\u003e OSHA Annotated PEL tables, OSHA 29 CFR 1910, ACGIH Threshold Limit Values, manufacturer data sheets.\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 (tag wcsafety04-20). Buyer guidance only, not medical, legal or regulatory advice — confirm gas-detection requirements against the applicable OSHA standard and, for commercial programs, a Certified Industrial Hygienist (CIH).\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n \"@context\": \"https:\/\/schema.org\",\n \"@graph\": [\n  {\n   \"@type\": \"CollectionPage\",\n   \"@id\": \"https:\/\/wcsafety.com\/collections\/ozone-gas-detectors#collection\",\n   \"name\": \"Ozone (O3) Gas Detectors\",\n   \"description\": \"Shop ozone (O3) gas detectors for ozone generators, water treatment and labs. Handheld O3 monitors for a strong oxidant. Compare and choose.\",\n   \"url\": \"https:\/\/wcsafety.com\/collections\/ozone-gas-detectors\",\n   \"isPartOf\": {\n    \"@type\": \"WebSite\",\n    \"name\": \"WC Safety\",\n    \"url\": \"https:\/\/wcsafety.com\"\n   },\n   \"breadcrumb\": {\n    \"@id\": \"https:\/\/wcsafety.com\/collections\/ozone-gas-detectors#breadcrumb\"\n   }\n  },\n  {\n   \"@type\": \"FAQPage\",\n   \"mainEntity\": [\n    {\n     \"@type\": \"Question\",\n     \"name\": \"What detects ozone gas?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"A dedicated O3 detector with an ozone-specific sensor — a standard 4-gas monitor does not cover ozone.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"What is the OSHA limit for ozone?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"0.1 ppm as an 8-hour TWA per the OSHA PEL; ACGIH lists action levels by workload.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"Where is ozone detection used?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Ozone-generator and disinfection rooms, water and wastewater ozone treatment, laboratories, clean rooms and food processing.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"Why monitor ozone?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Ozone is a strong oxidant, toxic at low concentrations, and is generated intentionally in disinfection — leaks and over-generation must be caught.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"Do ozone sensors drift?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Yes — ozone sensors are sensitive and can drift; verify against a known source periodically and replace per the manufacturer's guidance.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"Is ozone heavier than air?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Ozone is slightly heavier than air; place detectors near the breathing zone and around generator and treatment equipment.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"Can I use it for confined-space entry?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Ozone is one hazard; entry also needs O2, combustible and toxic testing with a portable 4-gas instrument.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"Portable or fixed ozone detection?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Handheld units cover surveys and exposure; fixed ozone monitoring exists for generator and treatment rooms. See Fixed Gas Detection Systems.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"What does the ATO Ozone Detector cover?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"The ATO Ozone Detector reads 0-50 ppm O3 on an LCD with audible, visual and vibration alarms.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"How dangerous is ozone exposure?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Ozone is toxic at very low concentrations, irritating the respiratory tract, which is why the OSHA limit is just 0.1 ppm.\"\n     }\n    }\n   ]\n  },\n  {\n   \"@type\": \"BreadcrumbList\",\n   \"@id\": \"https:\/\/wcsafety.com\/collections\/ozone-gas-detectors#breadcrumb\",\n   \"itemListElement\": [\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 1,\n     \"name\": \"Home\",\n     \"item\": \"https:\/\/wcsafety.com\/\"\n    },\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 2,\n     \"name\": \"Gas Detectors\",\n     \"item\": \"https:\/\/wcsafety.com\/collections\/gas-detectors\"\n    },\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 3,\n     \"name\": \"Ozone (O3) Gas Detectors\"\n    }\n   ]\n  }\n ]\n}\n\u003c\/script\u003e","products":[{"product_id":"ato-ozone-gas-detector-o3","title":"ATO Ozone Gas Detector — O3 Handheld Monitor (0-50 ppm)","description":"\u003c!-- PRODUCT B08BC7DV8Q | tag portable-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 ATO ozone gas detector is one of the instruments we curate in our \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e buyer’s hub. Compare it with the \u003ca href=\"\/products\/forensics-voc-detector\" title=\"Forensics VOC Detector\"\u003eForensics VOC Detector\u003c\/a\u003e below before you order.\u003c\/div\u003e\n\n\u003ch2 id=\"top\"\u003eATO Ozone Gas Detector — Handheld O3 Monitor\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eATO ozone gas detector\u003c\/strong\u003e measures O3 from 0-50 ppm on a clear LCD — the \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"portable gas detector\"\u003eportable gas detector\u003c\/a\u003e for ozone-generator rooms, water treatment and labs, covering a strong oxidant the four-gas set doesn’t detect.\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 ATO Ozone Gas Detector is a handheld O3 monitor (0-50 ppm) with an LCD display and audible, visual and vibration alarms for ozone generators, water treatment and laboratories.\u003c\/p\u003e\n\n\u003ch3 id=\"features\"\u003eKey features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eMeasures ozone (O3) from 0-50 ppm — a strong oxidant outside the 4-gas set\u003c\/li\u003e\n\u003cli\u003eDigital LCD display for clear ppm readout\u003c\/li\u003e\n\u003cli\u003eAudible, visual and vibration alarms\u003c\/li\u003e\n\u003cli\u003eHandheld for ozone-generator rooms, water treatment and labs\u003c\/li\u003e\n\u003cli\u003eCovers the O3 hazard a four-gas monitor doesn't detect\u003c\/li\u003e\n\u003cli\u003eFrom ATO, an industrial instrument brand\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\u003eDedicated ozone detection\u003c\/li\u003e\n\u003cli\u003e0-50 ppm range\u003c\/li\u003e\n\u003cli\u003eTriple alarm modes\u003c\/li\u003e\n\u003cli\u003eClear LCD readout\u003c\/li\u003e\n\u003cli\u003eIndustrial ATO brand\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\u003eOzone only\u003c\/li\u003e\n\u003cli\u003ePremium price for the category\u003c\/li\u003e\n\u003cli\u003eOzone sensors drift and need verification\u003c\/li\u003e\n\u003cli\u003eNot explosion-rated\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;\"\u003eGas detected\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eOzone (O3)\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;\"\u003eRange\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003e0-50 ppm\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;\"\u003eLCD digital\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;\"\u003eAlarm\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\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;\"\u003eBattery \/ rechargeable\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;\"\u003e300 g\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;\"\u003eUse\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eOzone generators, water treatment, labs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003ch3\u003eWhere the ATO Ozone Detector fits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eOzone generator and disinfection rooms\u003c\/li\u003e\n\u003cli\u003eWater and wastewater ozone treatment\u003c\/li\u003e\n\u003cli\u003eLaboratories and clean rooms\u003c\/li\u003e\n\u003cli\u003eFood processing ozone systems\u003c\/li\u003e\n\u003cli\u003eLeak checks around O3 equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat the ATO Ozone Detector detects (and what it doesn’t)\u003c\/h2\u003e\n\n\u003cp\u003eIt detects \u003cstrong\u003eozone (O3) only\u003c\/strong\u003e — not O2, combustibles, CO or H2S. For the four atmospheric gases use a \u003ca href=\"\/products\/forensics-detectors-4-gas-meter-confined-space\" title=\"Forensics 4 Gas Meter\"\u003eForensics 4 Gas Meter\u003c\/a\u003e; for other single toxics see the \u003ca href=\"\/products\/forensics-chlorine-analyzer-cl2\" title=\"Chlorine\"\u003eChlorine\u003c\/a\u003e or \u003ca href=\"\/products\/forensics-sulfur-dioxide-analyzer-so2\" title=\"SO2\"\u003eSO2\u003c\/a\u003e analyzers. Ozone sensors drift over time, so verify against a known source periodically. It is a toxic-gas monitor, not explosion-rated.\u003c\/p\u003e\n\n\u003cp\u003eCross-shopping? This unit sits in our \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e hub alongside \u003ca href=\"\/products\/forensics-voc-detector\" title=\"Forensics VOC Detector\"\u003eForensics VOC Detector\u003c\/a\u003e, \u003ca href=\"\/products\/amprobe-co2-100-carbon-dioxide-meter\" title=\"Amprobe CO2-100\"\u003eAmprobe CO2-100\u003c\/a\u003e, \u003ca href=\"\/products\/forensics-ammonia-detector-nh3\" title=\"Forensics Ammonia Detector\"\u003eForensics Ammonia Detector\u003c\/a\u003e, \u003ca href=\"\/products\/forensics-chlorine-analyzer-cl2\" title=\"Forensics Chlorine Analyzer\"\u003eForensics Chlorine Analyzer\u003c\/a\u003e. For other gas-detection form factors see \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, \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 ATO ozone detector fits\u003c\/h2\u003e\n\n\u003cp\u003eThe ATO O3 detector covers ozone, a gap separate from the four-gas set and the other specialty toxics. For chlorine or SO2, see the \u003ca href=\"\/products\/forensics-chlorine-analyzer-cl2\" title=\"Forensics Chlorine\"\u003eForensics Chlorine\u003c\/a\u003e and \u003ca href=\"\/products\/forensics-sulfur-dioxide-analyzer-so2\" title=\"SO2\"\u003eSO2\u003c\/a\u003e analyzers; for the four atmospheric gases a \u003ca href=\"\/products\/forensics-detectors-4-gas-meter-confined-space\" title=\"4 Gas Meter\"\u003e4 Gas Meter\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eChoose the \u003cstrong\u003eATO Ozone Detector\u003c\/strong\u003e for ozone-generator rooms, water treatment and labs.\u003c\/li\u003e\n\u003cli\u003eFor chlorine or SO2, use the \u003ca href=\"\/products\/forensics-chlorine-analyzer-cl2\" title=\"Chlorine\"\u003eChlorine\u003c\/a\u003e and \u003ca href=\"\/products\/forensics-sulfur-dioxide-analyzer-so2\" title=\"SO2\"\u003eSO2\u003c\/a\u003e analyzers.\u003c\/li\u003e\n\u003cli\u003eFor O2\/LEL\/CO\/H2S, use a \u003ca href=\"\/products\/forensics-detectors-4-gas-meter-confined-space\" title=\"4 Gas Meter\"\u003e4 Gas Meter\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"faq\"\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat does the ATO ozone gas detector measure?\u003c\/h3\u003e\u003cp\u003eOzone (O3) from 0-50 ppm. It does not measure O2, LEL, CO or H2S — use a \u003ca href=\"\/products\/forensics-detectors-4-gas-meter-confined-space\" title=\"4 gas meter\"\u003e4 gas meter\u003c\/a\u003e for those.\u003c\/p\u003e\n\u003ch3\u003eWhere is an ozone detector used?\u003c\/h3\u003e\u003cp\u003eOzone-generator and disinfection rooms, water and wastewater ozone treatment, laboratories, clean rooms and food-processing ozone systems.\u003c\/p\u003e\n\u003ch3\u003eWhy monitor ozone?\u003c\/h3\u003e\u003cp\u003eOzone is a strong oxidant that is toxic at low concentrations and is generated intentionally in many disinfection processes, so leaks and over-generation must be caught.\u003c\/p\u003e\n\u003ch3\u003eWhat alarms does it have?\u003c\/h3\u003e\u003cp\u003eAudible, visual and vibration alarms trigger when O3 exceeds the set point, shown on a digital LCD.\u003c\/p\u003e\n\u003ch3\u003eDo ozone sensors drift?\u003c\/h3\u003e\u003cp\u003eYes — ozone sensors are sensitive and can drift; verify against a known source periodically and replace per the manufacturer's guidance.\u003c\/p\u003e\n\u003ch3\u003eHow is it powered?\u003c\/h3\u003e\u003cp\u003eIt uses a battery\/rechargeable supply sized for field use; keep it charged for survey work.\u003c\/p\u003e\n\u003ch3\u003eCan it detect other gases?\u003c\/h3\u003e\u003cp\u003eNo — ozone only. For chlorine use the \u003ca href=\"\/products\/forensics-chlorine-analyzer-cl2\" title=\"Chlorine Analyzer\"\u003eChlorine Analyzer\u003c\/a\u003e; for SO2 the \u003ca href=\"\/products\/forensics-sulfur-dioxide-analyzer-so2\" title=\"SO2 Analyzer\"\u003eSO2 Analyzer\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eIs it explosion-rated?\u003c\/h3\u003e\u003cp\u003eNo — it is a toxic-gas monitor. For flammable atmospheres use a rated \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e or \u003ca href=\"\/collections\/fixed-gas-detection-systems\" title=\"Fixed Gas Detection Systems\"\u003eFixed Gas Detection Systems\u003c\/a\u003e instrument.\u003c\/p\u003e\n\u003ch3\u003eWhat are the ozone exposure limits?\u003c\/h3\u003e\u003cp\u003eSet alarms to the applicable OSHA PEL and ACGIH TLV for ozone; confirm current values for your program.\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\u003eIs ATO a reputable brand?\u003c\/h3\u003e\u003cp\u003eATO is an industrial instrument supplier; this O3 detector is its dedicated ozone monitor for generator and treatment applications.\u003c\/p\u003e\n\u003ch3\u003eCan I use it for confined-space entry?\u003c\/h3\u003e\u003cp\u003eOzone is one hazard; entry also needs O2, combustible and toxic testing. Use a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e 4-gas instrument for pre-entry plus this for the ozone component.\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\u003eATO ozone 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\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable 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\/B08BC7DV8Q?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 ATO 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 ATO Ozone Detector 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\/ato-ozone-gas-detector-o3#product\", \"name\": \"ATO Ozone Gas Detector — O3 Handheld Monitor (0-50 ppm)\", \"description\": \"ATO ozone gas detector — handheld O3 monitor, 0-50 ppm with LCD display and alarms for ozone generators, water treatment and labs. Order at WC Safety.\", \"sku\": \"B08BC7DV8Q\", \"mpn\": \"ATO-O3\", \"image\": [\"https:\/\/wcsafety.com\/cdn\/shop\/products\/ato-ozone-gas-detector-o3.jpg\"], \"brand\": {\"@type\": \"Brand\", \"name\": \"ATO\"}, \"category\": \"Portable Gas Detector\", \"isPartOf\": {\"@type\": \"CollectionPage\", \"@id\": \"https:\/\/wcsafety.com\/collections\/portable-gas-detectors#collection\", \"name\": \"Portable Gas Detectors\", \"url\": \"https:\/\/wcsafety.com\/collections\/portable-gas-detectors\"}, \"isRelatedTo\": [{\"@type\": \"Product\", \"name\": \"Forensics VOC Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-voc-detector\"}, {\"@type\": \"Product\", \"name\": \"Amprobe CO2-100 Carbon Dioxide Meter\", \"url\": \"https:\/\/wcsafety.com\/products\/amprobe-co2-100-carbon-dioxide-meter\"}, {\"@type\": \"Product\", \"name\": \"Forensics Ammonia (NH3) Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-ammonia-detector-nh3\"}, {\"@type\": \"Product\", \"name\": \"Forensics Chlorine (Cl2) Analyzer\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-chlorine-analyzer-cl2\"}, {\"@type\": \"Product\", \"name\": \"Forensics Sulfur Dioxide (SO2) Analyzer\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-sulfur-dioxide-analyzer-so2\"}, {\"@type\": \"Product\", \"name\": \"ATO Handheld 4 Gas Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/ato-handheld-4-gas-detector\"}, {\"@type\": \"Product\", \"name\": \"Forensics Mini 4 Gas Monitor\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-mini-4-gas-monitor\"}, {\"@type\": \"Product\", \"name\": \"Forensics Detectors 4 Gas Meter\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-detectors-4-gas-meter-confined-space\"}, {\"@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\/ato-ozone-gas-detector-o3\", \"priceCurrency\": \"USD\", \"price\": \"814.99\", \"availability\": \"https:\/\/schema.org\/InStock\", \"seller\": {\"@type\": \"Organization\", \"name\": \"WC Safety\"}}}, {\"@type\": \"BreadcrumbList\", \"@id\": \"https:\/\/wcsafety.com\/products\/ato-ozone-gas-detector-o3#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\": \"Portable Gas Detectors\", \"item\": \"https:\/\/wcsafety.com\/collections\/portable-gas-detectors\"}, {\"@type\": \"ListItem\", \"position\": 4, \"name\": \"ATO Ozone Gas Detector — O3 Handheld Monitor (0-50 ppm)\"}]}, {\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the ATO ozone gas detector measure?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Ozone (O3) from 0-50 ppm. 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Use a Portable Gas Detectors 4-gas instrument for pre-entry plus this for the ozone component.\"}}]}, {\"@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\": \"ATO\"}]}\n\u003c\/script\u003e","brand":"ATO","offers":[{"title":"Default Title","offer_id":44266961436760,"sku":"B08BC7DV8Q","price":814.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/1900\/0920\/files\/71_rYz4isUL._AC_SL1500_9b9ec505-4a8f-4a74-98b8-99878b1a6ef8.jpg?v=1782133096"}],"url":"https:\/\/wcsafety.com\/collections\/ozone-gas-detectors.oembed","provider":"WC Safety","version":"1.0","type":"link"}