8.4mm Large-Diameter HD Videoscope with High-Lumen Illumination for Wide-Bore Industrial Inspection

Product Overview

The Sugia OmniScope A4 occupies the large-diameter, maximum-image-quality segment of the A-Series. With an 8.4 mm probe diameter — the largest in the Sugia lineup — the A4 accommodates a 1/3-inch 2.0-megapixel back-illuminated CMOS sensor and an illumination system delivering a measured 5000 lux at 100 mm working distance. This combination enables detailed visual documentation of large internal volumes where ambient light contamination is not a concern and maximum pixel resolution is the overriding requirement.

The 8.4 mm diameter intentionally targets access ports of 10 mm and larger — steam-turbine casing inspection ports, pressure-vessel manway nozzle bores, large-bore process-pipe flanges, and marine diesel engine cylinder-liner inspection ports. In these applications, probe diameter is not the limiting factor; image quality and illumination reach are.

The A4’s 2.0-megapixel sensor captures still images at 1920 × 1080 (Full HD) and video at 1080p/60 fps with H.265 (HEVC) encoding for reduced file sizes while maintaining full spatial resolution. The high-frame-rate mode (720p/120 fps) enables slow-motion review of fast-moving mechanical components — valve-stem motion, actuator linkage travel, rotating shaft surface inspection — at 1/4 real-time playback speed without frame interpolation artifacts.

Key Engineering Features

• 2.0 Megapixel Full HD Sensor: 1/3-inch BSI CMOS with 2.0 µm pixel pitch; 1920 × 1080 still images; 1080p/60 fps video with H.265 encoding; high-speed 720p/120 fps mode for slow-motion mechanical review.
• 5000-Lumen Illumination System: Twenty-four high-CRI (Ra ≥ 90) white LEDs arranged in a compound parabolic concentrator (CPC) ring; 5000 lux measured at 100 mm working distance; uniform beam profile (±8% across 70% central field area).
• 7.5 m Insertion Tube Capability: The 8.4 mm probe’s larger tension-wire cross-sections enable 160° articulation at the full 7.5 m working length without the articulation-range degradation that affects smaller-diameter long probes.
• H.265 Video Encoding: Hardware HEVC encoder reduces 1080p/60 fps video file sizes by approximately 40% compared to H.264 at equivalent quality settings, extending effective recording time on a given storage volume.
• 120 fps High-Speed Mode: 720p capture at 120 fps; playback at 30 fps for 1/4-speed slow motion. Essential for documenting intermittent mechanical events (sticking valve stems, intermittent contact, transient debris movement) that occur faster than 30 fps capture can resolve.

Technical Specifications

Parameter	Value
Probe Outer Diameter	8.4 mm
Insertion Tube Length	3.5 m / 5.0 m / 7.5 m
Articulation	4-way TrueGlide, 160° per axis
Image Sensor	1/3-inch BSI CMOS
Effective Pixels	1920 × 1080 (2.0 Megapixel)
Frame Rate	60 fps (1080p), 120 fps (720p high-speed)
Video Encoding	H.265 (HEVC) main profile
Field of View	80° diagonal
Depth of Field	15 mm – ∞
Illumination	24-element white LED CPC array, Ra ≥ 90
Illumination Output	5000 lux at 100 mm working distance
Illumination Uniformity	±8% across 70% central field
Minimum Bend Radius	55 mm
Console Display	10.1-inch IPS, 1920 × 1200, 500 cd/m²
Console Storage	512 GB NVMe SSD
Network	Gigabit Ethernet + Wi-Fi 6
Video Output	HDMI 2.0 + DisplayPort 1.4 (4K upscaling for external display)
Battery	2× 7.4 V Li-ion, 48 Wh each
Runtime	~2.5 h (1080p/60 fps continuous recording)
Ingress Protection	Probe tip IP67, console IP65 (closed)
System Weight	5.9 kg (console + 5.0 m probe + dual batteries)

Target Applications

• Steam-Turbine Inspection: Low-pressure turbine blade-root and blade-attachment visual examination through casing inspection ports; last-stage blade erosion condition documentation; diaphragm and gland-seal labyrinth wear assessment.
• Large-Bore Process Piping & Vessels: Internal surface inspection of pressure vessels through 12-inch and larger manway nozzles where maximum image detail is required for corrosion-morphology characterization; large-diameter heat-exchanger shell-side internal inspection through body-flange access.
• Marine Propulsion: Slow-speed two-stroke marine diesel cylinder-liner bore scoring assessment through indicator-cock access ports; piston-crown combustion-surface condition documentation; exhaust-valve seat and spindle face inspection.
• Hydroelectric Power: Turbine-runner blade cavitation-damage mapping through draft-tube or stay-vane access; wicket-gate seal inspection; penstock internal coating-condition surveys during dewatered outages.