3nh NH300 Portable Color Difference Meter for Coatings

Overview

The 3nh NH300 Portable Color Difference Meter is an entry-level industrial-grade spectrophotometric color measurement instrument engineered for rapid, repeatable color evaluation in coating, paint, plastics, and printing applications. It operates on the principle of diffuse reflectance spectroscopy under controlled CIE-standard illumination (D65), utilizing an 8°/diffuse optical geometry compliant with ISO 7724-1, ASTM E308, and CIE No. 15. This configuration minimizes directional bias from surface texture and gloss variations—critical for accurate assessment of matte, semi-gloss, and textured coatings. The device integrates a multi-channel silicon photodiode array sensor with high linearity across the visible spectrum (400–700 nm), enabling robust spectral data acquisition without moving parts or mechanical filters. Its compact form factor and battery-powered operation support on-site measurement at production lines, supplier audits, or field service locations—eliminating reliance on lab-based benchtop units for routine pass/fail checks.

Key Features

• Optical architecture conforming to CIE 8°/diffuse geometry with integrated D65 illuminant—ensuring metrological consistency with international color standards.
• High-stability analog front-end IC platform and proprietary real-time color calculation algorithm optimized for ΔE*ab, ΔE00, L*a*b*, L*C*h*, and CMYK conversion.
• Repeatability validated per BCRA Series II 12-tile reference set: ΔE*ab ≤ 0.4 (mean value), supporting QC workflows requiring tight inter-instrument agreement.
• Ergonomic handheld design with tactile feedback buttons, anti-slip rubberized housing, and intuitive single-button measurement activation—reducing operator fatigue during extended shift use.
• Onboard memory storing up to 2,000 measurement records with timestamp, sample ID, and reference/standard delta values—enabling offline traceability without external software.
• USB-C interface for firmware updates and bidirectional data transfer; compatible with Windows-based 3nh Color Quality Management Software (CQMS) for statistical process control (SPC) charting and report generation.

Sample Compatibility & Compliance

The NH300 accommodates flat, curved, and moderately textured surfaces typical of liquid-applied coatings, powder-coated metal substrates, and automotive OEM finishes. Its 8 mm measurement aperture ensures sufficient sampling area while maintaining portability. The instrument meets key regulatory and industry requirements for color verification in manufacturing environments, including ISO 9001-aligned documentation practices, GLP-compliant data logging (via optional audit trail extension in CQMS), and alignment with ASTM D2244 (Standard Practice for Calculation of Color Differences from Instrumentally Measured Color Coordinates). While not FDA 21 CFR Part 11–validated out-of-the-box, its raw data export capability supports integration into validated laboratory information management systems (LIMS) where electronic record integrity is mandated.

Software & Data Management

The included 3nh Color Quality Management Software (CQMS) provides comprehensive post-acquisition analysis: tolerance setting per L*a*b* or ΔE metric, batch comparison reports, trend analysis over time, and customizable PDF/Excel export. All measurements retain embedded metadata—including instrument serial number, calibration date, illuminant, observer angle (2° standard), and user-defined sample tags—facilitating root cause analysis in non-conformance investigations. CQMS supports multi-user role-based access control and optional SPC module for X-bar/R chart generation, aligning with IATF 16949 and ISO/IEC 17025 quality system expectations.

Applications

• Coating formulation validation and batch-to-batch color consistency checks in R&D labs.
• In-line color release testing prior to packaging or shipment in paint manufacturing facilities.
• Supplier qualification audits for automotive trim, appliance housings, and architectural coatings.
• Field verification of touch-up paint matches during maintenance or repair operations.
• Quality gate inspection for printed labels, packaging films, and plastic injection-molded components.

FAQ

Is the NH300 suitable for measuring metallic or pearlescent coatings?
It provides relative color difference data under D65 illumination but lacks multi-angle measurement capability; for effect pigments, a goniospectrophotometer (e.g., BYK-mac or X-Rite MA98) is recommended.
Does the NH300 support calibration against NIST-traceable standards?
Yes—it accepts user-loaded calibration tiles with certified L*a*b* values; factory calibration uses BCRA Series II tiles traceable to NPL (UK) via accredited third-party verification.
Can measurement data be exported in CSV format for integration with ERP or MES systems?
Yes—CQMS exports fully structured CSV files containing all measured parameters, metadata, and tolerance status flags.
What is the battery life under continuous operation?
Approximately 8,000 measurements per full charge (Li-ion, USB-C rechargeable), with low-power sleep mode activating after 60 seconds of inactivity.
Is firmware upgrade supported remotely?
Yes—firmware updates are distributed via 3nh’s secure customer portal and installed locally using CQMS or standalone updater utility.