{"product_id":"oblique-probe-4mhz-8x9mm-60-degree-weld-flaw-detector-steel","title":"Oblique Probe 4MHz 8x9mm 60° Ultrasonic Weld Flaw Detector","description":"\n\u003ch2\u003eOblique Probe 4MHz 8x9mm 60° | Ultrasonic Weld Inspection for Steel Structures\u003c\/h2\u003e\n\u003cp\u003eAchieve precise, reliable weld inspections with this professional-grade \u003cstrong\u003eOblique Probe (4MHz, 8x9mm, 60°)\u003c\/strong\u003e. Designed for ultrasonic flaw detection on steel structures, this angled transducer probe is engineered to locate internal discontinuities, inclusions, and subsurface anomalies in welded joints — delivering accurate results in industrial, fabrication, and quality-control environments.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 4MHz — optimized for high-resolution detection in steel welds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCrystal Size:\u003c\/strong\u003e 8x9mm — compact footprint for access in tight inspection zones\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBeam Angle:\u003c\/strong\u003e 60° oblique angle ideal for weld root and fusion zone scanning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible:\u003c\/strong\u003e Works with most standard ultrasonic flaw detector units\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSteel-Optimized:\u003c\/strong\u003e Tuned specifically for use on carbon steel and structural steel weld testing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Robust casing built to withstand demanding workshop and field conditions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable Signal:\u003c\/strong\u003e High sensitivity transducer for clear, repeatable echo responses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Oblique Probe (4MHz, 8x9mm, 60°)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSteel structure weld quality inspection\u003c\/li\u003e\n  \u003cli\u003eFabrication and manufacturing QA\/QC\u003c\/li\u003e\n  \u003cli\u003ePipeline and pressure vessel weld checks\u003c\/li\u003e\n  \u003cli\u003eStructural engineering inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003cp\u003eFor professional guidance on non-destructive testing (NDT) standards and ultrasonic inspection procedures, refer to the OSHA Non-Destructive Testing resource.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-60mpa-pressure-gauge-s60h-diesel-injector-nozzle-tester-8000psi\"\u003e0-60MPa Pressure Gauge for S60H Diesel Injector Nozzle Tester\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-4-3-8-to-m4-m5-m6-m8-m10-thread-conversion-screw-mount-adapter-tripod-projector\"\u003e1\/4\" \u0026amp; 3\/8\" to M4–M10 Thread Conversion Screw Mount Adapter\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/hex-shank-wire-twister-drill-attachment-rebar-tie-wire-tool\"\u003e1\/4\" Hex Wire Twister Drill Attachment – Rebar Tie Wire Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Magnetic_flux_leakage\" target=\"_blank\" rel=\"noopener\"\u003eMagnetic flux leakage\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is an oblique probe and how is it used in weld flaw detection?\u003c\/h4\u003e\n\u003cp\u003eA: An oblique (angled) probe emits ultrasonic waves at a set angle — in this case 60° — into the test material. This angled beam is essential for inspecting weld joints, as it allows the sound waves to travel along the weld fusion zone and reflect off any internal flaws such as cracks, porosity, or lack-of-fusion defects, which a straight-beam probe would miss. It is a standard tool in ultrasonic non-destructive testing (NDT) of steel structures.\u003c\/p\u003e\n\u003ch4\u003eQ: What flaw detector units is this probe compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This 4MHz oblique probe uses a standard connector interface compatible with most common ultrasonic flaw detector instruments. Always check the connector type of your specific flaw detector before ordering to ensure a direct fit or appropriate adapter is available.\u003c\/p\u003e\n\u003ch4\u003eQ: Why is a 4MHz frequency and 60° angle used for steel weld inspection?\u003c\/h4\u003e\n\u003cp\u003eA: A 4MHz frequency provides a good balance between penetration depth and resolution in steel, making it well-suited for detecting smaller defects in medium-thickness steel welds. The 60° refraction angle is one of the most widely used angles in weld inspection because it efficiently targets the weld root area and side-wall fusion zones — the regions most prone to critical weld defects.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this probe suitable for use on materials other than steel?\u003c\/h4\u003e\n\u003cp\u003eA: This probe is optimized and calibrated for use on steel structures. While ultrasonic probes can physically contact other metals, the beam angle and frequency characteristics are specifically suited to steel's acoustic properties. For other materials (aluminum, stainless steel, etc.), verify compatibility with your flaw detector manufacturer or NDT specialist.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is an oblique probe and how is it used in weld flaw detection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"An oblique (angled) probe emits ultrasonic waves at a set angle — in this case 60° — into the test material. This angled beam is essential for inspecting weld joints, as it allows the sound waves to travel along the weld fusion zone and reflect off any internal flaws such as cracks, porosity, or lack-of-fusion defects, which a straight-beam probe would miss. 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For other materials (aluminum, stainless steel, etc.), verify compatibility with your flaw detector manufacturer or NDT specialist.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Sewing \u0026 Hand Tools\", \"item\": \"https:\/\/oasis-select.com\/collections\/sewing-hand-tools\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Oblique Probe 4MHz 8x9mm 60° Ultrasonic Weld Flaw Detector\", \"item\": \"https:\/\/oasis-select.com\/products\/oblique-probe-4mhz-8x9mm-60-degree-weld-flaw-detector-steel\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"5MHz8x9 45","offer_id":47745141342313,"sku":"14:350853#5MHz8x9 45","price":112.71,"currency_code":"USD","in_stock":true},{"title":"5MHz8x9 60","offer_id":47745141375081,"sku":"14:10#5MHz8x9 60","price":112.71,"currency_code":"USD","in_stock":true},{"title":"5MHz8x9 70","offer_id":47745141407849,"sku":"14:29#5MHz8x9 70","price":112.71,"currency_code":"USD","in_stock":true},{"title":"4MHz8x9 45","offer_id":47745141440617,"sku":"14:350686#4MHz8x9 45","price":112.71,"currency_code":"USD","in_stock":true},{"title":"4MHz8x9 70","offer_id":47745141473385,"sku":"14:350850#4MHz8x9 70","price":112.71,"currency_code":"USD","in_stock":true},{"title":"4MHz8x9 60","offer_id":47745141506153,"sku":"14:350852#4MHz8x9 60","price":112.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S970162a528ab4e70875fdfcda4ae7dfeN.webp?v=1783030556","url":"https:\/\/oasis-select.com\/products\/oblique-probe-4mhz-8x9mm-60-degree-weld-flaw-detector-steel","provider":"Oasis Select","version":"1.0","type":"link"}