Kegel Micro-Gloss 45 Portable Gloss Meter

Overview

The Kegel Micro-Gloss 45 is a precision-engineered portable gloss meter designed for rapid, repeatable surface gloss assessment across industrial quality control and R&D environments. Operating on the principle of specular reflectance at a fixed 45° incident angle, it quantifies the ratio of reflected luminous flux to incident flux under standardized illumination conditions—fully aligned with ISO 2813 and ASTM D2457 definitions of gloss. Unlike variable-angle instruments, the 45° geometry is specifically optimized for low-to-medium gloss surfaces typical of ceramics, rigid and flexible plastics, coated films, and lacquered substrates where subtle variations in surface finish directly impact perceived quality and functional performance. Developed from foundational metrology research conducted at BAM (Bundesanstalt für Materialforschung und -prüfung), the instrument embodies traceable calibration architecture and long-term stability essential for GLP-compliant laboratories and ISO 9001-certified production lines.

Key Features

• Compact ergonomic design: Dimensions of 120 × 65 × 35 mm and mass under 200 g enable true one-handed operation and pocket-portability—even with integrated calibration stand attached.
• Intuitive human-machine interface: Rotary encoder navigation paired with backlit LCD ensures reliable operation under varying ambient lighting, including factory floor or cleanroom conditions.
• Automated calibration sequence: Single-button initiation triggers internal validation against a certified ceramic reference tile; no manual zeroing or external recalibration required between daily use sessions.
• Dual measurement modes: Instant single-shot acquisition or statistical mode (up to 99 readings per batch), automatically computing arithmetic mean and standard deviation in real time.
• Robust data management: Onboard memory retains 999 complete measurement records with timestamp and operator ID fields; RS-232 interface enables direct transfer to LIMS or legacy QC databases.
• Battery endurance: Lithium-ion power system supports >3000 consecutive measurements per full charge—validated per IEC 62304 software lifecycle requirements.

Sample Compatibility & Compliance

The Micro-Gloss 45 is validated for non-destructive surface evaluation of planar and gently curved substrates with radius ≥50 mm. It delivers high reproducibility on matte-finish ceramics (gloss units: 1–35 GU), injection-molded ABS/PC parts (10–120 GU), biaxially oriented polypropylene (BOPP) films (20–80 GU), and UV-cured acrylic coatings. Its optical path conforms to the geometric constraints defined in ASTM C346 (ceramic tile), ASTM D3679 (plastic film), and JIS Z 8741 (general-purpose gloss). All units ship with BAM-traceable calibration certificate and comply with EU Measuring Instruments Directive (MID) Annex MI-001 for non-automatic weighing and optical measuring instruments.

Software & Data Management

The included easy-link software provides audit-ready data handling compliant with FDA 21 CFR Part 11 requirements: electronic signatures, user access levels, and immutable audit trails for all calibration events and measurement exports. Raw data exports as .csv or native .xls formats retain full metadata—including measurement date/time, instrument serial number, calibration status flag, and statistical parameters. Integration with Microsoft Excel allows automated charting of trend data against specification limits (e.g., ±2 GU tolerance bands), supporting SPC-based process capability analysis (Cp/Cpk).

Applications

• QC release testing of ceramic sanitaryware and architectural tiles per EN 14411.
• In-line gloss verification during extrusion of plastic films and thermoformed packaging.
• Coating uniformity assessment in automotive interior trim manufacturing.
• R&D evaluation of anti-glare additives in polycarbonate lenses.
• Supplier qualification audits requiring third-party traceable gloss reporting.

FAQ

Is the Micro-Gloss 45 suitable for curved surfaces?

Yes—provided the local radius of curvature exceeds 50 mm and the measurement spot remains fully within the illuminated area (defined by 45° cone geometry).
Does the instrument support multi-angle gloss measurement?

No—it is a dedicated 45° gloss meter. For 20°/60°/85° comparative analysis, refer to Kegel’s modular GlossMaster series.
How often must the reference standard be recertified?

BAM recommends annual recalibration of the ceramic reference tile by an accredited metrology laboratory (ISO/IEC 17025).
Can measurement data be exported directly to SAP QM modules?

Via RS-232 to middleware or custom API integration—easy-link supports configurable field mapping to match SAP QM data structure requirements.
What environmental conditions affect measurement accuracy?

Ambient temperature drift >±5°C from calibration temperature (23°C ±2°C) or relative humidity >80% may introduce systematic bias; instrument includes built-in thermal compensation.