Digital Injector Valve Cone Bore Inspection Microscope | 2MP Articulating Probe With Integrated 4.3" Screen & Micro‑USB Image Capture

Injector valve cone surfaces are among the most critical sealing interfaces in the common rail system. Yet, traditional inspection relies on tactile methods-applying Prussian blue to the control valve spool and interpreting the transfer pattern-or on the naked eye using a simple magnifying glass. These methods are subjective, non‑recordable, and heavily dependent on the inspector's experience. A scratch that one technician deems "minor" may be the root cause of a 5% increase in internal leakage for another. The Digital Injector Valve Cone Bore Inspection Microscope (Model DMM‑5) replaces subjectivity with objective, digital documentation. It captures high‑resolution images of the cone surface, stores them directly in the device, and provides a digital record for service reports, quality control, and customer verification-eliminating interpretation disputes and creating a traceable inspection history.

The DMM‑5 integrates a 2‑megapixel CMOS sensor with a 10x optical zoom lens, delivering a magnification range of 15x to 40x. This provides sufficient detail to identify surface scratches as fine as 3 µm wide, pits, and wear patterns on the cone surface. The image is displayed on a built‑in 4.3‑inch TFT LCD screen with a resolution of 480 x 272 pixels, providing a clear, real‑time view of the cone surface without the need to look through an eyepiece. This screen‑based viewing reduces eye strain and allows multiple technicians to view the image simultaneously-a significant advantage for training and collaborative diagnostic sessions.

Sensor: 2 MP (1,920 x 1,080 effective pixels)

Optical Zoom: 10x (stepless adjustment)

Digital Zoom: Up to 4x (image interpolation)

Screen: 4.3" TFT, 480 x 272 resolution

Light Source: 8‑LED ring light (white, 5,500 K), adjustable intensity 0–100%

Like its optical counterpart, the digital version uses a 45° angled prism at the tip of a 3.5 mm diameter probe, redirecting the viewing axis perpendicular to the cone surface. This design provides a direct, perpendicular view of the 60° (or 74°) cone surface, regardless of the injector's orientation. The probe tip is protected by a sapphire window, ensuring scratch‑free visibility even after repeated use.

Probe Diameter: 3.5 mm (fits 4 mm and larger bores)

Angled View: 45° deflection

Field of View: 1.8 mm diameter (at 40x magnification)

The DMM‑5 includes a Micro‑USB port for connecting to a computer. The device can capture still images (JPEG format, 2 MP resolution) and short video clips (AVI, 30 fps) directly to the internal memory (8 GB, expandable via microSD). This allows the technician to:

Attach images to service reports for customer verification.

Compare before‑and‑after images to confirm cleaning effectiveness.

Share images with remote experts for diagnostic consultation.

Build a historical record of injector wear patterns for predictive maintenance analysis.

Beyond visual inspection, the DMM‑5 includes on‑screen measurement software that enables direct dimensioning of surface features:

Line Measurement: Measuring scratch length, wear land width.

Angle Measurement: Verifying the cone angle (critical for sealing).

Area Measurement: Estimating the area of pitting or corrosion.

The software is pre‑calibrated to the optical system; the operator simply positions two on‑screen markers to measure a feature, with readings displayed in microns.

Q1: What is the advantage of a digital microscope over an optical one?
A: An optical microscope provides a live view but cannot record what you see. The digital version captures images and videos, allowing you to document the cone condition for service reports and to track wear over time. This traceability is essential for quality control.

Q2: Can I measure the actual surface roughness (Ra) with this device?
A: No. The DMM‑5 provides visual inspection and geometric measurements (length, width, angle). It does not measure roughness (Ra). For roughness measurement, a profilometer is required. However, the high‑resolution image allows you to visually estimate roughness by comparing to the included surface finish reference chart.

Q3: How do I transfer images from the device to my computer?
A: Connect the Micro‑USB port to a computer; the device appears as a removable drive. Images are stored in the "DCIM" folder. Alternatively, you can remove the microSD card and use a card reader. The device is compatible with Windows and macOS.

Q4: The 4.3‑inch screen seems small. Is it easy to see fine details?
A: The 480 x 272 resolution is sufficient for the 2 MP sensor output. The screen has an anti‑glare coating, and the brightness is adjustable. For fine details, we recommend using the digital zoom or connecting the device to an external monitor via the HDMI output (available on the Pro version).

Q5: Is the probe compatible with piezo injectors?
A: Yes. The probe accesses the valve body bore, which is common to both solenoid and piezo injectors. However, the injector must be disassembled to access the valve body-the probe cannot be inserted through an assembled injector.

Q6: Can I use this microscope for other purposes, such as inspecting nozzle holes?
A: The probe is designed for the valve cone, not for nozzle holes. For nozzle hole inspection, we offer a separate device (the NIM‑5) with a smaller probe and a different optical path. The DMM‑5 is purpose‑built for cone and seat surfaces.

 

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