ColorFlex EZ HunterLab

ColorFlex EZ: Stand-alone spectrophotometer for color measurement in 45°/0° measurement geometry

The stand-alone ColorFlex EZ colorimeter with large color LCD and extremely easy handling is the answer to current and future requirements in every respect. The device is used in all areas of industry: food, pharmaceuticals, chemical products, plastics and building materials. In all cases, the device impresses with its reliability and robust design with small dimensions.

Your advantages at a glance

The perfect solution for laboratory & production

  • Many measuring openings

    Various measuring openings (10 mm, 13 mm, 19 mm, 25.4 mm, 31.8 mm) for many types of samples.
  • Compact dimensions

    With a weight of 4.5 kg and dimensions of 16.0 cm (height), 13.0 cm (width) and 36.0 cm (depth), the CFEZ is the ideal partner in the laboratory and production.
  • Integrated QC software

    Display of absolute and differential data, color location visualization, spectral curves, spectral data and PASS/FAIL with individual tolerances.
  • 45°/0° geometry

    The CFEZ measures color as the human eye sees it. Every day. Reliable and precise.
  • In many versions

    The ColorFlex EZ is available in Tomato, Citrus and Coffee versions.
  • Uncomplicated & precise

    Simple measurement at the touch of a button with measurement results within a few seconds. Reduces training time, optimizes the workflow and increases your productivity.

Stand-alone colorimetric station

The ColorFlex EZ serves as an independent colorimetric station. QC software is integrated into the measuring device. The display is backlit on a sharp color display with freely selectable contrast ratio and dimmer function.

The fully sealed system guarantees precise results for many years. Dirt, dust and liquids cannot get inside – this makes the system the ideal colorimeter, even in harsh production environments.

Measure color as the eye sees it

With the ColorFlex®EZ, the illumination is circular around the sample at 45° – this ensures that the sample is illuminated as homogeneously as possible. This DIN standardized method corresponds best to the visual color impression of our human eye. 45°/0° and 0°/45° are therefore usually considered when the overall impression (appearance) of a particular color is to be measured.

Various ColorFlex EZ versions

ColorFlex EZ Citrus

The firmware contains: CN (Citrus Number), CR (Citrus Redness), CY (Citrus Yellowness)


ColorFlex EZ Coffee

The firmware includes: HCCI (HunterLab Coffee Color Index), SCAA number, SCAA roast classification (Specialty Coffee Association of America)


ColorFlex EZ Tomato

The firmware includes: Tomato Paste Score (TPS), Tomato Sauce Score (TSS), Tomato Catsup Score (TCS), Tomato Juice Score (TJS), a/b ratio, Fresh Tomato Color Index (FTCI)

Technical data of the ColorFlex EZ

Measuring method



Software features

Indices & measurement data

Key data

Measuring principle: Non-contact dual-beam spectrophotometer

Spectrometer: Polychromator with 256-element diode array; concave, holographic grating

Geometry: 45° illumination, 0° observation

Orientation: Measuring opening either upwards or to the front

Measuring surface: 31.8 mm illuminated / 25.4 mm measured (optional measuring openings: 10 mm, 13 mm, 19 mm, 25.4 mm)

Spectral range: 400 nm – 700 nm

Wavelength resolution: < 3 nm

Effective bandwidth: 10 nm equivalent triangular

Reporting interval: 10 nm

Photometric bandwidth: 0 to 150 %

Light source: Xenon flash lamp, filtered for D65 approach

Lamp life: > 1,000,000 flashes

Number of flashes/measurement: 1 flash

Measuring time: < 1 second (2 seconds from triggering to data display)

Measuring interval: 3 seconds

Conformity to standards: CIE 15:2004, ISO 7724/1, ASTM E1164, DIN 5033 Part 7 and JIS Z 8722 Condition C

Traceability: Calibration and assignment of device standards is performed in accordance with the National Institute for Standards and Technology (NIST) according to the principles described in CIE Publication 44 and ASTM E259

Device compliance:

  • ΔE < 0.15 CIE L*a*b* (Avg) to BCRA II tile set
  • ΔE < 0.25 CIE L*a*b* (Max) to BCRA II tile set

Colorimetric repeatability: ΔE < 0.03 CIE L*a*b* (Max) on white tile (20 measurements)

Data views: Color data, color difference data, tristimulus color plot, spectral data, spectral difference data, spectral curves,

Spectral difference curves

USB memory Features: Backup of setups and data, transfer to other devices, CSV data export

Other features: pass/fail evaluation, average, standard deviation

Color scales: CIE L*a*b*, Hunter Lab, CIE L*C*h, CIE Yxy, CIE XYZ

Color difference scales: ΔL*a*b*, ΔLab, ΔL*C*h, ΔYxy, ΔXYZ

Color difference indices: ΔE*, ΔE, ΔC*, ΔC, ΔEcmc

Memory: 250 spectral standards with tolerances, working standards, physical standards, numerical or hitch, 2000 spectral samples

Standard light types: A, C, D50, D55, D65, D75, F02, F07, F11

Observer functions: 2° and 10°

Languages: German, English, Chinese, French, Italian, Spanish

External software: Compatible with EasyMatch QC and EasyMatch QC-ER (Electronic Records) quality control software

  • E313 Whiteness
  • Tint
  • E313 Yellowness
  • D1925 Yellow degree
  • Y Brightness
  • Z %
  • 457 nm Brightness
  • Opacity
  • Color strength
  • Gray scale
  • Metamerism
  • Shade Number
  • Option CFEZ Tomato: TPS (Paste), TSS (Sauce), TCS (Catsup), TJS (Juice), a/b ratio, Lycopene Index
  • Option CFEZ Citrus: CN (Citrus Number), CR (Citrus Redness), CY (Citrus Yellowness)
  • Option CFEZ Coffee: HCCI, SCAA Number, SCAA Roast Classification


  • Height: 16 cm (6.3 in)
  • Width: 13 cm (5.1 in)
  • Depth: 36 cm (14.2 in)
  • Weight: 4.5 kg (9.9 lbs)

Display: 7.1 cm x 5.4 cm color LCD, illuminated

Power supply: 100 to 240 VAC, 47 to 63 Hz

Working conditions: 10° to 40°C, 10 % – 90 % rel. humidity Air humidity

Storage conditions: -20° to 65°C, 10 % – 90 % relative humidity. Air humidity

Scope of delivery:

  • calibrated white tile
  • Traceability certificate
  • Black glass
  • Protective cover
  • Green test tile,
  • USB memory
  • Mains adapter
  • Manual

ColorFlex EZ Accessories

Ring & Disk Set

Stamp and spacer ring for accurate measurement of translucent samples. (Round cuvette 64 mm made of glass and matching measuring aperture available separately)

64mm glass cuvette

Foot switch for measurement triggering

Measurements can be easily triggered using the foot switch.

Barcode scanner

USB printer

USB keyboard

HunterLab worldwide:

  • Headquarters, North / South America

    Hunter Associates Laboratory, Inc.

  • 11491 Sunset Hills Road

    Reston, VA 20190-5280

  • +1 571 470 6028

  • Asia-Pacific

    HunterLab Asia Limited
  • Flat E, 13/F Leahander Center

    28 Wang Wo Tsai Street, Tsuen Wan New Territories, Hong Kong

  • +852 2406 1723

  • Europe / Middle East / Africa

    HunterLab Europe GmbH

  • Dr.-August-Einsele-Ring 15

    82418 Murnau

  • +49 8841 9464

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+49 8841 9464

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