3nh NH300 Portable Spectrophotometric Colorimeter

Overview

The 3nh NH300 Portable Spectrophotometric Colorimeter is an engineered solution for rapid, field-deployable color measurement and deviation analysis in industrial quality assurance and R&D environments. Based on the 8°/diffuse (d/8°) optical geometry compliant with CIE No. 15 and ISO 7724-1, the NH300 employs a stable blue-LED-excited phosphor illumination system to generate consistent spectral output across the visible range (approx. 400–700 nm), eliminating the drift and aging issues associated with traditional tungsten-halogen or xenon sources. Its compact form factor—measuring 205 × 70 × 100 mm and weighing only 500 g—enables handheld operation without compromising optical alignment integrity. Designed for high reproducibility (≤0.10 ΔE*ab repeatability on standard white tile), the instrument delivers metrologically traceable color data aligned with CIELAB (L*a*b*) and CIEDE2000 color difference metrics. It serves as a bridge between laboratory-grade benchtop spectrophotometers and entry-level colorimeters, offering lab-grade consistency in a portable platform suitable for production floor audits, supplier evaluations, and multi-site QC coordination.

Key Features

• Integrated optical preview via built-in camera for precise targeting—enabling accurate placement over textured, curved, or recessed surfaces prior to measurement.
• Self-calibrating white reference: internal white calibration tile housed within the protective cap ensures automatic zero-point verification upon power-on, minimizing user-induced calibration error.
• Robust mechanical architecture with sealed optical path and anti-dust aperture design, optimized for factory-floor durability and long-term stability under variable ambient lighting.
• High-capacity rechargeable lithium-ion battery (3.7 V, 3200 mAh) supports up to 3,000 measurements per full charge—validated under continuous 8-hour operational testing.
• USB interface enables direct data export to Windows-based PCs; compatible with 3nh’s proprietary QC software for statistical process control (SPC), tolerance band mapping, and batch reporting.
• Optional extended Φ8 mm probe facilitates reliable measurement of concave geometries (e.g., molded plastic housings, bottle interiors, or coated cavities) without requiring sample repositioning or fixture adaptation.

Sample Compatibility & Compliance

The NH300 accommodates flat, curved, matte, glossy, and textured substrates—including plastics, painted metal, textiles, paperboard, ceramic glazes, and coated pharmaceutical tablets—provided surface dimensions exceed the 8 mm measurement aperture. Its diffuse illumination geometry mitigates directional reflectance artifacts common in directional instruments, making it suitable for ASTM D2244 (standard practice for calculation of color differences), ISO 11664-4 (CIE colorimetric observers), and ISO 12647-2 (process control in graphic arts). While not certified to FDA 21 CFR Part 11 out-of-the-box, audit trails, user access logs, and electronic signature support are available through the optional QC software package when deployed in GLP/GMP-regulated environments (e.g., cosmetic formulation labs or medical device coating validation).

Software & Data Management

The NH300 operates in tandem with 3nh’s ColorQC Pro software (Windows 10/11 compatible), which provides comprehensive data governance features: customizable pass/fail tolerances per L*, a*, b*, ΔE*ab, and ΔE00; real-time SPC charts (X-bar/R, Cp/Cpk); historical trend analysis; PDF/Excel report generation; and role-based user permissions. All measurement records include timestamp, operator ID, instrument serial number, and environmental metadata (temperature/humidity if logged externally). Data synchronization supports CSV, XML, and proprietary .3nh formats—enabling integration into LIMS or MES platforms via scripted import workflows. Firmware updates are delivered via USB and validated with SHA-256 checksums to ensure integrity.

Applications

The NH300 is routinely deployed in incoming raw material inspection (e.g., pigment lots, masterbatch pellets), in-process color verification during extrusion or coating lines, final product release testing (consumer electronics housings, automotive trim), and comparative analysis across supplier batches. In academic settings, it supports undergraduate optics labs, materials science projects on polymer degradation kinetics, and textile dye migration studies. Its portability allows for on-site evaluation of architectural coatings, signage panels, or heritage conservation pigments where transport to centralized labs is impractical.

FAQ

What is the inter-instrument agreement specification for the NH300?
The NH300 meets ≤0.40 ΔE*ab (based on BCRA Series II tiles), ensuring consistent results across multiple units in multi-station deployments.
Does the NH300 support CIEDE2000 color difference calculations?
Yes—both ΔE*ab and ΔE00 are computed in real time and exportable via software.
Can the NH300 measure transparent or translucent films?
Not directly; it requires an opaque backing (e.g., black/white tile) beneath the film to prevent substrate interference—consistent with ISO 5-4 guidelines for transmission-mode exclusion.
Is firmware upgrade capability included?
Yes—field-upgradable firmware is provided free of charge via 3nh’s official support portal, with version history and release notes publicly documented.
How is traceability maintained for calibration?
Each unit ships with NIST-traceable calibration certificate (optional at time of order); internal white calibration references are verified daily against this baseline, and full recalibration services are available through authorized 3nh service centers.