X-Rite Spectrophotometer Model 964 (0°/45° Geometry)

Overview

The X-Rite Spectrophotometer Model 964 is a handheld, 0°/45° geometry spectrophotometer engineered for high-accuracy color measurement in industrial quality control environments. It employs diffuse reflectance spectroscopy (DRS) with a pulsed tungsten-halogen light source and blue-enhanced silicon photodiode array to deliver stable, repeatable spectral data across the visible spectrum (400–700 nm at 10 nm intervals). Its fixed 0°/45° optical configuration conforms to ISO 5–4 and ASTM E308, ensuring compliance with international colorimetric standards for non-scattering, directional-surface measurements—particularly suited for coated, printed, plastic, textile, and painted substrates where texture and gloss influence perception. Unlike sphere-based instruments, the 0°/45° geometry minimizes specular component inclusion, making it ideal for evaluating color consistency under viewing conditions that simulate typical visual assessment in production settings.

Key Features

• Interchangeable apertures (4 mm/6.5 mm, 7 mm/9 mm, 15 mm/21.5 mm) enable optimized sampling for small details, textured surfaces, or large-area averaging—supporting both spot-check verification and statistical process control (SPC) sampling protocols.
• Large 128 × 256-pixel monochrome LCD provides clear visualization of spectral curves, CIE L*a*b*, ΔE*ab deviations, and pass/fail status—even under ambient factory lighting.
• On-device programming of step-by-step measurement workflows guides operators through standardized procedures, reducing human error and enhancing cross-shift reproducibility—critical for GLP- and GMP-aligned labs.
• Onboard storage supports up to 1,024 tolerance-defined standards and 2,000 sample records, enabling offline evaluation without real-time PC connectivity.
• Ergonomic design includes tactile side grips, wrist strap, and flip-up target base for stable positioning on curved, inclined, or irregular surfaces—minimizing operator fatigue during extended field use.
• Robust inter-instrument agreement (≤0.15 ΔE*ab avg. on BCRA II tiles at 7/15 mm apertures) ensures consistent color specification transfer across multi-site manufacturing networks and supplier qualification programs.

Sample Compatibility & Compliance

The Model 964 accommodates diverse material classes—including opaque plastics, metallic coatings, solvent- and water-based inks, woven textiles, and powder-coated metals—without requiring auxiliary accessories. Its 0°/45° geometry inherently excludes specular reflection, eliminating the need for gloss masking or mechanical gloss traps when assessing color independent of surface finish. The instrument supports CIE 2° and 10° standard observer functions and implements all major illuminants (D50, D65, A, F2, etc.) per CIE Publication No. 15 and ISO/CIE 11664 series. Calibration traceability aligns with NIST-traceable standards, and its performance metrics satisfy requirements outlined in ISO 13655 (spectral measurement) and ASTM D2244 (color difference calculation). For regulated industries, audit-ready measurement logs—including timestamp, aperture used, illuminant/observer selection, and operator ID—can be exported via RS-232 for integration into 21 CFR Part 11-compliant data management systems.

Software & Data Management

While fully functional as a standalone device, the Model 964 integrates seamlessly with X-Rite’s Color iQC and Color iMatch software suites via bidirectional RS-232 communication (300–57,600 baud). These platforms support advanced color formulation, tolerance mapping (ellipsoidal or rectangular), SPC charting (X-bar/R, Cpk), and automated reporting compliant with ISO/IEC 17025 documentation requirements. All spectral data is stored in industry-standard .ciex format, enabling interoperability with third-party LIMS, MES, and ERP systems. Firmware updates preserve backward compatibility with legacy calibration files and user-defined standards libraries, ensuring long-term investment protection across product lifecycle phases.

Applications

• Automotive OEM and Tier-1 suppliers verifying paint match across body panels and interior trim components.
• Printing and packaging converters validating ink density, hue shift, and metamerism across substrate batches.
• Plastics compounders certifying masterbatch dispersion uniformity and batch-to-batch color stability.
• Textile mills performing shade matching for dyed fabrics under multiple illuminants to assess metamerism risk.
• Consumer electronics manufacturers controlling anodized aluminum, PVD-coated housings, and injection-molded enclosures.
• Food packaging producers monitoring color consistency of laminated films and flexographic prints under regulatory-compliant lighting conditions.

FAQ

What is the recommended calibration frequency for routine QC use?
X-Rite recommends daily zero and white calibration using supplied ceramic tiles, especially before critical measurement sessions or after environmental shifts exceeding ±5 °C. Full recalibration against NIST-traceable standards is advised every 12 months or per internal QA protocol.
Can the Model 964 measure transparent or translucent samples?
No—it is designed exclusively for opaque, reflective surfaces. Translucent or backlit materials require 0°/d or d/0° sphere geometry instruments with transmission capability.
Is the RS-232 interface compatible with modern Windows/macOS systems?
Yes, when paired with a USB-to-RS-232 adapter (e.g., FTDI-based), the interface supports native COM port recognition and is fully supported by X-Rite’s current software versions.
Does the device support custom tolerance definitions beyond CIE L*a*b*?
Yes—Color iQC allows definition of CMC (l:c), DIN99, DE2000, and user-weighted tolerances, with pass/fail logic applied directly on-device for go/no-go decisions in-line.
How is measurement repeatability verified during factory certification?
Each unit undergoes 20 consecutive readings on a certified white tile; units meeting ≤0.05 ΔE*ab standard deviation are released with individual performance certificates traceable to X-Rite’s metrology lab.