{"product_id":"toptes-rt-389-refrigerant-leak-detector","title":"TopTes RT-389 Refrigerant Leak Detector — Rechargeable, 3 Sensitivity Modes","description":"\u003c!-- PRODUCT B0DSHTX11Z | 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 TopTes RT-389 refrigerant 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\/klein-tools-et120-gas-leak-detector\" title=\"Klein Tools ET120\"\u003eKlein Tools ET120\u003c\/a\u003e below before you order.\u003c\/div\u003e\n\n\u003ch2 id=\"top\"\u003eTopTes RT-389 Refrigerant Leak Detector — Rechargeable HVAC Sniffer\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eTopTes RT-389 refrigerant leak detector\u003c\/strong\u003e is the affordable, rechargeable way into refrigerant leak detection — a \u003ca href=\"\/collections\/gas-leak-detectors\" title=\"gas leak detector\"\u003egas leak detector\u003c\/a\u003e with three sensitivity modes and three alarm types covering halogenated refrigerants (CFCs, HCFCs, HFCs, HFOs and HC blends). It pinpoints the leak; it does not measure whether a space is safe.\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 TopTes RT-389 is a rechargeable refrigerant leak detector with three sensitivity modes and three alarm types that detects CFC, HCFC, HFC, HFO and HC refrigerants.\u003c\/p\u003e\n\n\u003ch3 id=\"features\"\u003eKey features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eRechargeable refrigerant sniffer covering CFC, HCFC, HFC, HFO and HC blends\u003c\/li\u003e\n\u003cli\u003eThree selectable sensitivity modes to locate then pinpoint the leak\u003c\/li\u003e\n\u003cli\u003eThree alarm types — audible, visual and vibration\u003c\/li\u003e\n\u003cli\u003eAffordable entry into refrigerant leak detection\u003c\/li\u003e\n\u003cli\u003eRechargeable — no disposable cells to manage\u003c\/li\u003e\n\u003cli\u003eCompact, lightweight body for coil and fitting access\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\u003eAffordable refrigerant detection\u003c\/li\u003e\n\u003cli\u003eThree sensitivity modes\u003c\/li\u003e\n\u003cli\u003eThree alarm types\u003c\/li\u003e\n\u003cli\u003eRechargeable\u003c\/li\u003e\n\u003cli\u003eBroad refrigerant coverage incl. HFOs\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\u003eLess sensitive\/durable than pro heated-diode or infrared tools\u003c\/li\u003e\n\u003cli\u003eRefrigerants only\u003c\/li\u003e\n\u003cli\u003eNewer model with a smaller review base\u003c\/li\u003e\n\u003cli\u003eNot an atmosphere safety monitor\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;\"\u003eRefrigerants — CFCs, HCFCs, HFCs, HFOs, HC blends\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;\"\u003e3 selectable modes\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;\"\u003e3 types (audible, visual, 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;\"\u003eRechargeable\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;\"\u003eHVAC, A\/C, automotive\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;\"\u003e~271 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003ch3\u003eWhere the TopTes RT-389 fits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eEntry-level HVAC\/R leak checks\u003c\/li\u003e\n\u003cli\u003eDIY and light-trade A\/C service\u003c\/li\u003e\n\u003cli\u003eAutomotive A\/C diagnostics\u003c\/li\u003e\n\u003cli\u003eBackup refrigerant sniffer\u003c\/li\u003e\n\u003cli\u003eOccasional leak-repair verification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat the TopTes RT-389 detects (and what it doesn’t)\u003c\/h2\u003e\n\n\u003cp\u003eIt detects halogenated refrigerants (CFCs, HCFCs, HFCs, HFOs and HC blends) — not combustibles, CO or oxygen. For natural-gas or propane leaks use a combustible sniffer such as the \u003ca href=\"\/products\/toptes-pt520a-gas-leak-detector\" title=\"TopTes PT520A\"\u003eTopTes PT520A\u003c\/a\u003e; for CO see the \u003ca href=\"\/collections\/carbon-monoxide-alarms-detectors\" title=\"Carbon Monoxide Alarms \u0026amp; Detectors\"\u003eCarbon Monoxide Alarms \u0026amp; Detectors\u003c\/a\u003e range. As a leak locator it finds the source, not atmosphere safety — use a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e monitor for occupied-space decisions. Use the three sensitivity modes to 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\/klein-tools-et120-gas-leak-detector\" title=\"Klein Tools ET120\"\u003eKlein Tools ET120\u003c\/a\u003e, \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. 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 TopTes RT-389 compares\u003c\/h2\u003e\n\n\u003cp\u003eThe RT-389 is the budget rechargeable refrigerant option. For higher peak sensitivity, the \u003ca href=\"\/products\/fieldpiece-dr58-refrigerant-leak-detector\" title=\"Fieldpiece DR58\"\u003eFieldpiece DR58\u003c\/a\u003e (heated diode) is the pro pick; the \u003ca href=\"\/products\/elitech-ild-200-refrigerant-leak-detector\" title=\"Elitech ILD-200\"\u003eElitech ILD-200\u003c\/a\u003e offers a long-life infrared sensor for lower lifetime cost.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eChoose the \u003cstrong\u003eTopTes RT-389\u003c\/strong\u003e for affordable, rechargeable refrigerant detection with selectable sensitivity.\u003c\/li\u003e\n\u003cli\u003eStep up to the \u003ca href=\"\/products\/elitech-ild-200-refrigerant-leak-detector\" title=\"Elitech ILD-200\"\u003eElitech ILD-200\u003c\/a\u003e for a long-life infrared sensor.\u003c\/li\u003e\n\u003cli\u003eChoose the \u003ca href=\"\/products\/fieldpiece-dr58-refrigerant-leak-detector\" title=\"Fieldpiece DR58\"\u003eFieldpiece DR58\u003c\/a\u003e for pro-grade heated-diode sensitivity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 id=\"faq\"\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat refrigerants does the TopTes RT-389 detect?\u003c\/h3\u003e\u003cp\u003eIt detects halogenated refrigerants (CFCs, HCFCs, HFCs, HFOs and HC blends) — including newer HFO and HC blends. It does not detect combustibles or CO.\u003c\/p\u003e\n\u003ch3\u003eIs the RT-389 rechargeable?\u003c\/h3\u003e\u003cp\u003eYes — it uses a rechargeable battery, so there are no disposable cells to manage between service calls.\u003c\/p\u003e\n\u003ch3\u003eWhat are the three sensitivity modes for?\u003c\/h3\u003e\u003cp\u003eThey let you start on high sensitivity to find the leak area, then step down to pinpoint the exact joint without constant false triggering.\u003c\/p\u003e\n\u003ch3\u003eHow does it compare to the Fieldpiece DR58 and Elitech ILD-200?\u003c\/h3\u003e\u003cp\u003eThe RT-389 is the budget rechargeable option; the \u003ca href=\"\/products\/fieldpiece-dr58-refrigerant-leak-detector\" title=\"Fieldpiece DR58\"\u003eFieldpiece DR58\u003c\/a\u003e is a pro heated-diode tool with higher peak sensitivity, and the \u003ca href=\"\/products\/elitech-ild-200-refrigerant-leak-detector\" title=\"Elitech ILD-200\"\u003eElitech ILD-200\u003c\/a\u003e uses a long-life infrared sensor.\u003c\/p\u003e\n\u003ch3\u003eCan it tell me if a space is safe to enter?\u003c\/h3\u003e\u003cp\u003eNo — it locates refrigerant leaks only. For occupied-space safety use a \u003ca href=\"\/collections\/portable-gas-detectors\" title=\"Portable Gas Detectors\"\u003ePortable Gas Detectors\u003c\/a\u003e monitor.\u003c\/p\u003e\n\u003ch3\u003eDoes it detect natural gas or propane?\u003c\/h3\u003e\u003cp\u003eNo — it is refrigerant-specific. For combustibles use a sniffer like the \u003ca href=\"\/products\/toptes-pt520a-gas-leak-detector\" title=\"TopTes PT520A\"\u003eTopTes PT520A\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat alarm types does it have?\u003c\/h3\u003e\u003cp\u003eThree — audible, visual and vibration — so you get clear feedback in noisy or bright environments.\u003c\/p\u003e\n\u003ch3\u003eIs it good for automotive A\/C work?\u003c\/h3\u003e\u003cp\u003eYes — it suits automotive A\/C diagnostics as well as light HVAC\/R service, at an entry price.\u003c\/p\u003e\n\u003ch3\u003eHow do I pinpoint a leak?\u003c\/h3\u003e\u003cp\u003eSet a higher sensitivity to find the area, then lower it and sweep slowly along joints and coils to isolate the exact leak.\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 the RT-389 sensitive enough for small leaks?\u003c\/h3\u003e\u003cp\u003eIt handles typical leaks well; for the smallest losses, the pro \u003ca href=\"\/products\/fieldpiece-dr58-refrigerant-leak-detector\" title=\"Fieldpiece DR58\"\u003eFieldpiece DR58\u003c\/a\u003e or long-life \u003ca href=\"\/products\/elitech-ild-200-refrigerant-leak-detector\" title=\"Elitech ILD-200\"\u003eElitech ILD-200\u003c\/a\u003e are more sensitive.\u003c\/p\u003e\n\u003ch3\u003eDoes the sensor need replacing?\u003c\/h3\u003e\u003cp\u003eVerify performance against a known refrigerant source periodically; budget refrigerant sensors have a shorter service life than infrared units.\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\u003eTopTes RT-389 refrigerant 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\/B0DSHTX11Z?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 TopTes 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 TopTes RT-389 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\/toptes-rt-389-refrigerant-leak-detector#product\", \"name\": \"TopTes RT-389 Refrigerant Leak Detector — Rechargeable, 3 Sensitivity Modes\", \"description\": \"TopTes RT-389 refrigerant leak detector — rechargeable HVAC freon sniffer with 3 sensitivity modes for CFCs, HCFCs, HFCs and HFOs. Order at WC Safety.\", \"sku\": \"B0DSHTX11Z\", \"mpn\": \"RT-389\", \"image\": [\"https:\/\/wcsafety.com\/cdn\/shop\/products\/toptes-rt-389-refrigerant-leak-detector.jpg\"], \"brand\": {\"@type\": \"Brand\", \"name\": \"TopTes\"}, \"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\": \"Klein Tools ET120 Combustible Gas Leak Detector\", \"url\": \"https:\/\/wcsafety.com\/products\/klein-tools-et120-gas-leak-detector\"}, {\"@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\"}], \"offers\": {\"@type\": \"Offer\", \"url\": \"https:\/\/wcsafety.com\/products\/toptes-rt-389-refrigerant-leak-detector\", \"priceCurrency\": \"USD\", \"price\": \"129.99\", \"availability\": \"https:\/\/schema.org\/InStock\", \"seller\": {\"@type\": \"Organization\", \"name\": \"WC Safety\"}}}, {\"@type\": \"BreadcrumbList\", \"@id\": \"https:\/\/wcsafety.com\/products\/toptes-rt-389-refrigerant-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\": \"TopTes RT-389 Refrigerant Leak Detector — Rechargeable, 3 Sensitivity Modes\"}]}, {\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What refrigerants does the TopTes RT-389 detect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It detects halogenated refrigerants (CFCs, HCFCs, HFCs, HFOs and HC blends) — including newer HFO and HC blends. It does not detect combustibles or CO.\"}}, {\"@type\": \"Question\", \"name\": \"Is the RT-389 rechargeable?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — it uses a rechargeable battery, so there are no disposable cells to manage between service calls.\"}}, {\"@type\": \"Question\", \"name\": \"What are the three sensitivity modes for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They let you start on high sensitivity to find the leak area, then step down to pinpoint the exact joint without constant false triggering.\"}}, {\"@type\": \"Question\", \"name\": \"How does it compare to the Fieldpiece DR58 and Elitech ILD-200?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The RT-389 is the budget rechargeable option; the Fieldpiece DR58 is a pro heated-diode tool with higher peak sensitivity, and the Elitech ILD-200 uses a long-life infrared sensor.\"}}, {\"@type\": \"Question\", \"name\": \"Can it tell me if a space is safe to enter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — it locates refrigerant leaks only. 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