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  5. Flaw detection testing
  6. Ultraminiature probe / Ultrathin probe for Ultrasonic flow detection. Ultrasonic testing of narrow sections, small-diameter rods, and small components.

Ultraminiature probe / Ultrathin probe for Ultrasonic flow detection. Ultrasonic testing of narrow sections, small-diameter rods, and small components.

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"Chibita-kun," "Pechako-san," and others.

last updated:Feb 10, 2026

検査技術研究所
検査技術研究所
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Small in size, maximum capability. Ultra-compact probe, ultra-thin probe.

In 1988, KGK developed the world's smallest ultrasonic probes: the ultra-compact probe “Chibita-kun” and the ultra-thin probe “Pechako-san.” Since then, KGK has offered a standard lineup of ultra-compact probes designed for ultrasonic testing in narrow and extremely small areas. Despite their small size, these reliable probes provide solid quality and performance. For vertical inspection and immersion testing, you can use the world’s smallest probes, “Chibita-kun” and “Pechako-san,” and for angle beam ultrasonic testing, you can choose from ultra-compact angle beam probes such as the UX, UM, and UA series, depending on your application. ● Ideal for testing in narrow spaces, etc. ● Ultra-small probes can scan surfaces that cannot be scanned with standard probes. ● ChibiTa-kun has φ2×3mmL (minimum) ● PechaKo-san has a thickness of 1mm ● We also welcome inquiries regarding size dimensions.

    Testing Equipment and DevicesFlaw detection testing
超小型探触子.jpg

Ultraminiature probe / Ultrathin probe for Ultrasonic flow detection. Ultrasonic testing of narrow sections, small-diameter rods, and small components.

超小型探触子.jpg
超小型探触子.jpg
  • Related Link - https://www.probe-kgk.com/products/

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basic information

Type   Model    Transducer Size(mm) Frequency (MHz) Refraction Angle Remarks Vertical Probe  MM      1or.2    5or10or15 - Chibita-kun    PN      2or3    5or10or15 - Pechako-san Immersible Probe MI      1or2    5or10or15or20 - Chibita-kun    PI       2or3   10or15or20 - Pechako-san Oblique Probe   UX      3×3    5or10 35~70°(*) -    UM       5×5    5or10 35~70° (*) -    UA       5×5    5or10 35~70° (*) - Special Probe Small Insertion Probe    1~     5 - Actual Value *:Choose from this value

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Applications/Examples of results

Utilizing the small size and thinness of the probe, it can be combined with fixtures to perform ultrasonic testing in narrow spaces, etc. Inspection for angle beam method of small-diameter rods, etc.

Detailed information

  • DSC_1145.JPG

    Ultra-small angled probe

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Company information

検査技術研究所

検査技術研究所

Testing, Analysis and Measurement

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KGK Co., Ltd., a specialized manufacturer of ultrasonic probes, supports your safety management through the production of ultrasonic probes. As a manufacturing group, KGK is committed to meeting your needs and also accepts orders for custom-designed probes in addition to standard probes. If you have any issues regarding ultrasonic probes, please feel free to consult with KGK.

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