QBH-US23 Handheld Articulating Borescope (3.9mm / 6.2mm)

Choose the 3.9mm probe when access diameter is the primary constraint — standard spark plug holes (typically 14mm thread, ~10mm bore), diesel glow plug ports, and narrow aircraft inspection ports where a 6mm tool cannot pass. The 3.9mm variant uses 6× 0402 LEDs with a 20–50mm focal range, optimised for close-up inspection of valve seats, piston crowns, and injector tips at short working distances. Choose the 6.2mm probe (8× 0402 LEDs, 30–80mm focal range) when access allows — the larger sensor area and additional LEDs produce brighter, more even illumination in wider cavities such as cylinder bores, turbine inspection ports, and HVAC duct elbows. Both variants share the same ±180° two-way articulation and IP67 waterproof rating on the same 4.5-inch IPS host unit.

The US23 uses mechanical joystick articulation — the technician’s hand movement directly tensions the steering wires with no motor latency, giving immediate tactile feedback when the probe tip contacts a surface inside a cylinder or casting cavity. Motorized systems add response delay and require power even to hold a static angle; the US23’s mechanical linkage holds any angle within the ±180° steering range passively, with no power draw on the 5000mAh battery to maintain position. For automotive borescopes and articulating endoscope use in workshops where inspections are short (under 10 minutes per access point), mechanical articulation is faster to operate and eliminates the failure mode of motor burnout under repeated heavy use.

Yes. The US23 video inspection scope supports optional magnetic and hook attachments that mount at the probe tip for foreign object retrieval alongside visual inspection — a common requirement in articulating automotive borescope work (dropped fasteners in engine bays) and aerospace maintenance (FOD recovery in turbine access ports). The 3.9mm probe diameter allows the attachment to pass through the same narrow access points the camera enters. The 1280×720P / 80° FOV live image on the 4.5-inch IPS screen gives the technician real-time visual guidance during retrieval without a second operator. Contact QBH to confirm attachment compatibility with your specific probe configuration before ordering.

QBH supports OEM/ODM customization of the US23 from 500 units minimum — boot-screen animation is included at no additional fee at this volume. Configurable elements include private-label branding on the 4.5-inch IPS host body, probe diameter SKU selection (3.9mm or 6.2mm), boot animation, system language, and retail packaging. The Type-C fast charging port and 5000mAh battery spec are fixed on the standard configuration; battery capacity variants are available at higher MOQ. Standard unbranded samples ship in 1–3 days; custom-branded samples in 3–7 days. Bulk production runs 25–35 days with 100% pre-shipment inspection covering IP67 seal integrity, articulation steering function, and full optical output verification on every unit.