{"product_id":"klein-tools-et120-gas-leak-detector","title":"Klein Tools ET120 Gas Leak Detector — Combustible (18-in Gooseneck, 50-10,000 ppm)","description":"\u003c!-- PRODUCT B074NBJ8XP | tag gas-leak-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 Klein Tools ET120 gas leak detector is one of the instruments we curate in our \u003ca href=\"\/collections\/gas-leak-detectors\" title=\"Gas Leak Detectors\"\u003eGas Leak Detectors\u003c\/a\u003e buyer’s hub. Compare it with the \u003ca href=\"\/products\/forensics-detectors-gas-leak-detector\" title=\"Forensics Gas Leak Detector\"\u003eForensics Gas Leak Detector\u003c\/a\u003e below before you order.\u003c\/div\u003e\n\n\u003ch2 id=\"top\"\u003eKlein Tools ET120 Gas Leak Detector — Combustible Gas Tester\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eKlein Tools ET120 gas leak detector\u003c\/strong\u003e pinpoints combustible gases such as natural gas (methane), propane and butane with an 18-inch gooseneck and adjustable sensitivity — the \u003ca href=\"\/collections\/gas-leak-detectors\" title=\"gas leak detector\"\u003egas leak detector\u003c\/a\u003e trades and facilities reach for to trace a leak to its exact source. It locates the leak; it does not measure whether the air is safe to breathe.\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 Klein Tools ET120 is a handheld combustible gas leak detector with an 18-inch gooseneck probe, a 50-10,000 ppm range and adjustable sensitivity for pinpointing natural-gas and propane leaks.\u003c\/p\u003e\n\n\u003ch3 id=\"features\"\u003eKey features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003ePinpoints combustible-gas leaks from 50 to 10,000 ppm across a wide sensitivity range\u003c\/li\u003e\n\u003cli\u003e18-inch flexible gooseneck reaches behind appliances, under fittings and into tight joints\u003c\/li\u003e\n\u003cli\u003eAdjustable sensitivity to find the area first, then dial in the exact leak point\u003c\/li\u003e\n\u003cli\u003eAudible tick-rate plus visual indication that climbs as you near the source\u003c\/li\u003e\n\u003cli\u003eMost-reviewed leak detector we stock (1,800+ ratings, 4.6 stars)\u003c\/li\u003e\n\u003cli\u003eIncludes a storage pouch and batteries\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\u003eTrusted Klein Tools build\u003c\/li\u003e\n\u003cli\u003eLong 18-inch gooseneck probe\u003c\/li\u003e\n\u003cli\u003eWide 50-10,000 ppm range\u003c\/li\u003e\n\u003cli\u003eAdjustable sensitivity for pinpointing\u003c\/li\u003e\n\u003cli\u003eOutstanding 4.6-star, 1,800+ review record\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\u003eLocates leaks — does not measure whether an atmosphere is safe\u003c\/li\u003e\n\u003cli\u003eCombustible gases only (not refrigerants or toxics)\u003c\/li\u003e\n\u003cli\u003eBattery (not rechargeable)\u003c\/li\u003e\n\u003cli\u003eNot a confined-space entry instrument\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;\"\u003eFinds\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eCombustible gases (natural gas, methane, propane)\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;\"\u003e50–10,000 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;\"\u003eProbe\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003e18-inch flexible gooseneck\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;\"\u003eSensitivity\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003eAdjustable\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 tick-rate + visual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"color:#ffb74d;padding:8px 10px;border:1px solid #3a3a3a;white-space:nowrap;\"\u003eIncluded\u003c\/td\u003e\n\u003ctd style=\"color:#e0e0e0;padding:8px 10px;border:1px solid #3a3a3a;\"\u003ePouch and batteries\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;\"\u003e13 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003ch3\u003eWhere the Klein Tools ET120 fits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eNatural-gas line and appliance leak checks\u003c\/li\u003e\n\u003cli\u003ePropane and LP system service\u003c\/li\u003e\n\u003cli\u003ePost-repair pressure-test verification\u003c\/li\u003e\n\u003cli\u003ePlumbing and HVAC gas work\u003c\/li\u003e\n\u003cli\u003eFacilities maintenance leak surveys\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat the Klein Tools ET120 detects (and what it doesn’t)\u003c\/h2\u003e\n\n\u003cp\u003eThe ET120 finds combustible gases such as natural gas (methane), propane and butane — it does \u003cstrong\u003enot\u003c\/strong\u003e detect refrigerants, carbon monoxide, oxygen levels or specific toxics. For refrigerant work choose a \u003ca href=\"\/products\/fieldpiece-dr58-refrigerant-leak-detector\" title=\"Fieldpiece DR58\"\u003eFieldpiece DR58\u003c\/a\u003e or \u003ca href=\"\/products\/elitech-ild-200-refrigerant-leak-detector\" title=\"Elitech ILD-200\"\u003eElitech ILD-200\u003c\/a\u003e; for CO use the \u003ca href=\"\/collections\/carbon-monoxide-alarms-detectors\" title=\"Carbon Monoxide Alarms \u0026amp; Detectors\"\u003eCarbon Monoxide Alarms \u0026amp; Detectors\u003c\/a\u003e range. Crucially, a leak detector tells you \u003cem\u003ewhere\u003c\/em\u003e gas escapes, not whether a space is safe to enter — for that, use a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e monitor or a \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e clip. Adjustable sensitivity lets you locate the area, then pinpoint the joint.\u003c\/p\u003e\n\n\u003cp\u003eCross-shopping? This unit sits in our \u003ca href=\"\/collections\/gas-leak-detectors\" title=\"Gas Leak Detectors\"\u003eGas Leak Detectors\u003c\/a\u003e hub alongside \u003ca href=\"\/products\/forensics-detectors-gas-leak-detector\" title=\"Forensics Gas Leak Detector\"\u003eForensics Gas Leak Detector\u003c\/a\u003e, \u003ca href=\"\/products\/toptes-pt-830s-gas-leak-detector\" title=\"TopTes PT-830S\"\u003eTopTes PT-830S\u003c\/a\u003e, \u003ca href=\"\/products\/toptes-pt520a-gas-leak-detector\" title=\"TopTes PT520A\"\u003eTopTes PT520A\u003c\/a\u003e, \u003ca href=\"\/products\/toptes-pt210s-gas-leak-detector\" title=\"TopTes PT210S\"\u003eTopTes PT210S\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\"\u003eHow the Klein ET120 compares\u003c\/h2\u003e\n\n\u003cp\u003eThe ET120 is a premium combustible leak detector with a long 18-inch gooseneck and a deep review record. For lower-cost combustible sniffers, compare the \u003ca href=\"\/products\/toptes-pt520a-gas-leak-detector\" title=\"TopTes PT520A\"\u003eTopTes PT520A\u003c\/a\u003e (17-in gooseneck) and \u003ca href=\"\/products\/toptes-pt210s-gas-leak-detector\" title=\"TopTes PT210S\"\u003eTopTes PT210S\u003c\/a\u003e; for a rechargeable color-display option, the \u003ca href=\"\/products\/toptes-pt-830s-gas-leak-detector\" title=\"TopTes PT-830S\"\u003eTopTes PT-830S\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eChoose the \u003cstrong\u003eKlein ET120\u003c\/strong\u003e for a trusted-brand combustible sniffer with a long gooseneck and the deepest review record.\u003c\/li\u003e\n\u003cli\u003eSave money with the \u003ca href=\"\/products\/toptes-pt520a-gas-leak-detector\" title=\"TopTes PT520A\"\u003eTopTes PT520A\u003c\/a\u003e or \u003ca href=\"\/products\/toptes-pt210s-gas-leak-detector\" title=\"TopTes PT210S\"\u003eTopTes PT210S\u003c\/a\u003e combustible detectors.\u003c\/li\u003e\n\u003cli\u003eNeed refrigerant detection instead? See the \u003ca href=\"\/products\/fieldpiece-dr58-refrigerant-leak-detector\" title=\"Fieldpiece DR58\"\u003eFieldpiece DR58\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 Klein Tools ET120 detect?\u003c\/h3\u003e\u003cp\u003eIt detects combustible gases such as natural gas (methane), propane and butane from 50 to 10,000 ppm. It does not detect refrigerants, CO or oxygen — for those, use the matching instrument from the \u003ca href=\"\/collections\/gas-detectors\" title=\"Gas Detectors\"\u003eGas Detectors\u003c\/a\u003e hub.\u003c\/p\u003e\n\u003ch3\u003eHow long is the ET120 probe?\u003c\/h3\u003e\u003cp\u003eIt has an 18-inch flexible gooseneck that holds its shape, so you can reach behind appliances, under fittings and into tight joints.\u003c\/p\u003e\n\u003ch3\u003eCan the ET120 tell me if a space is safe to enter?\u003c\/h3\u003e\u003cp\u003eNo — it locates leaks, it does not measure concentration or oxygen. For entry safety use a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e gas monitor or a \u003ca href=\"\/collections\/personal-gas-detectors\" title=\"Personal \u0026amp; Wearable Gas Detectors\"\u003ePersonal \u0026amp; Wearable Gas Detectors\u003c\/a\u003e clip.\u003c\/p\u003e\n\u003ch3\u003eHow do I pinpoint a leak with adjustable sensitivity?\u003c\/h3\u003e\u003cp\u003eStart on high sensitivity to find the general area, then lower the sensitivity to zero in on the exact joint where the tick-rate peaks.\u003c\/p\u003e\n\u003ch3\u003eIs the ET120 rechargeable?\u003c\/h3\u003e\u003cp\u003eNo — it runs on batteries, which are included along with a storage pouch. Keep spares for long survey jobs.\u003c\/p\u003e\n\u003ch3\u003eWhat is the detection range?\u003c\/h3\u003e\u003cp\u003e50 to 10,000 ppm of combustible gas, which covers everything from a faint trace to a substantial leak as you sweep a line.\u003c\/p\u003e\n\u003ch3\u003eWill the ET120 find a propane leak?\u003c\/h3\u003e\u003cp\u003eYes — it detects propane and other combustible gases including natural gas and methane, making it suitable for LP system service.\u003c\/p\u003e\n\u003ch3\u003eHow does it signal a leak?\u003c\/h3\u003e\u003cp\u003eAn audible tick-rate and visual indication increase as gas concentration rises, guiding you to the source.\u003c\/p\u003e\n\u003ch3\u003eDoes the ET120 detect refrigerant or CO?\u003c\/h3\u003e\u003cp\u003eNo — it is combustible-gas only. For refrigerant use the \u003ca href=\"\/products\/fieldpiece-dr58-refrigerant-leak-detector\" title=\"Fieldpiece DR58\"\u003eFieldpiece DR58\u003c\/a\u003e; for carbon monoxide see the \u003ca href=\"\/collections\/carbon-monoxide-alarms-detectors\" title=\"Carbon Monoxide Alarms \u0026amp; Detectors\"\u003eCarbon Monoxide Alarms \u0026amp; Detectors\u003c\/a\u003e range.\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\u003eDo I need to calibrate the ET120?\u003c\/h3\u003e\u003cp\u003eCombustible leak detectors are not field-calibrated like monitors; verify response against a known small gas source periodically so you trust the readings.\u003c\/p\u003e\n\u003ch3\u003eHow does the ET120 compare to the TopTes combustible detectors?\u003c\/h3\u003e\u003cp\u003eThe ET120 is a premium Klein-brand unit with an 18-inch gooseneck; the \u003ca href=\"\/products\/toptes-pt520a-gas-leak-detector\" title=\"TopTes PT520A\"\u003eTopTes PT520A\u003c\/a\u003e and \u003ca href=\"\/products\/toptes-pt210s-gas-leak-detector\" title=\"PT210S\"\u003ePT210S\u003c\/a\u003e are lower-cost alternatives.\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\u003eKlein Tools ET120 gas leak 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\/gas-leak-detectors\" title=\"Gas Leak Detectors\"\u003eGas Leak 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\/B074NBJ8XP?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 Klein Tools 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 Klein Tools ET120 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\/klein-tools-et120-gas-leak-detector#product\", \"name\": \"Klein Tools ET120 Gas Leak Detector — Combustible (18-in Gooseneck, 50-10,000 ppm)\", \"description\": \"Klein Tools ET120 gas leak detector — combustible gas tester with 18-in gooseneck, 50-10,000 ppm range and adjustable sensitivity. Order at WC Safety.\", \"sku\": \"B074NBJ8XP\", \"mpn\": \"ET120\", \"image\": [\"https:\/\/wcsafety.com\/cdn\/shop\/products\/klein-tools-et120-gas-leak-detector.jpg\"], \"brand\": {\"@type\": \"Brand\", \"name\": \"Klein Tools\"}, \"category\": \"Gas Leak Detector\", \"isPartOf\": {\"@type\": \"CollectionPage\", \"@id\": \"https:\/\/wcsafety.com\/collections\/gas-leak-detectors#collection\", \"name\": \"Gas Leak Detectors\", \"url\": \"https:\/\/wcsafety.com\/collections\/gas-leak-detectors\"}, \"isRelatedTo\": [{\"@type\": \"Product\", \"name\": \"Forensics Detectors Gas Leak Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/forensics-detectors-gas-leak-detector\"}, {\"@type\": \"Product\", \"name\": \"TopTes PT-830S Gas Leak Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/toptes-pt-830s-gas-leak-detector\"}, {\"@type\": \"Product\", \"name\": \"TopTes PT520A Gas Leak Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/toptes-pt520a-gas-leak-detector\"}, {\"@type\": \"Product\", \"name\": \"TopTes PT210S Gas Leak Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/toptes-pt210s-gas-leak-detector\"}, {\"@type\": \"Product\", \"name\": \"Fieldpiece DR58 Refrigerant Leak Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/fieldpiece-dr58-refrigerant-leak-detector\"}, {\"@type\": \"Product\", \"name\": \"Elitech ILD-200 Refrigerant Leak Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/elitech-ild-200-refrigerant-leak-detector\"}, {\"@type\": \"Product\", \"name\": \"TopTes RT-389 Refrigerant Leak Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/toptes-rt-389-refrigerant-leak-detector\"}], \"offers\": {\"@type\": \"Offer\", \"url\": \"https:\/\/wcsafety.com\/products\/klein-tools-et120-gas-leak-detector\", \"priceCurrency\": \"USD\", \"price\": \"129.97\", \"availability\": \"https:\/\/schema.org\/InStock\", \"seller\": {\"@type\": \"Organization\", \"name\": \"WC Safety\"}}}, {\"@type\": \"BreadcrumbList\", \"@id\": \"https:\/\/wcsafety.com\/products\/klein-tools-et120-gas-leak-detector#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\": \"Gas Leak Detectors\", \"item\": \"https:\/\/wcsafety.com\/collections\/gas-leak-detectors\"}, {\"@type\": \"ListItem\", \"position\": 4, \"name\": \"Klein Tools ET120 Gas Leak Detector — Combustible (18-in Gooseneck, 50-10,000 ppm)\"}]}, {\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the Klein Tools ET120 detect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It detects combustible gases such as natural gas (methane), propane and butane from 50 to 10,000 ppm. It does not detect refrigerants, CO or oxygen — for those, use the matching instrument from the Gas Detectors hub.\"}}, {\"@type\": \"Question\", \"name\": \"How long is the ET120 probe?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It has an 18-inch flexible gooseneck that holds its shape, so you can reach behind appliances, under fittings and into tight joints.\"}}, {\"@type\": \"Question\", \"name\": \"Can the ET120 tell me if a space is safe to enter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — it locates leaks, it does not measure concentration or oxygen. For entry safety use a Portable Gas Detectors gas monitor or a Personal \u0026 Wearable Gas Detectors clip.\"}}, {\"@type\": \"Question\", \"name\": \"How do I pinpoint a leak with adjustable sensitivity?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Start on high sensitivity to find the general area, then lower the sensitivity to zero in on the exact joint where the tick-rate peaks.\"}}, {\"@type\": \"Question\", \"name\": \"Is the ET120 rechargeable?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — it runs on batteries, which are included along with a storage pouch. 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