Ultraminiature probe / Ultrathin probe for Ultrasonic flow detection

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

last updated：Dec 26, 2025

検査技術研究所

Official site

A small but reliable 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 angled inspections, you can choose from ultra-compact angled 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.

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.