Model #: ci51


For Entry-Level Retail Paint Measurement

The X-Rite Ci51 is a versatile, affordable, entry-level handheld sphere spectrophotometer that offers fast, easy means of capturing color data from customer-supplied samples.

Fast color matching for an efficient paint counter

Quickly determining formulation recipes for matching paint to customer-supplied samples enhances customer satisfaction and paint counter productivity. With the X-Rite Ci51 handheld spectrophotometer, counter personnel can measure flat or complex samples in less than two seconds on materials such as paper, plastic, fabric and a variety of hard surfaces.

The Ci51 is connected to a personal computer and can be used as a tethered handheld device or mounted for small footprint benchtop use. The accompanying ColorDesigner PLUS software formulates colors and stores paint recipes for fast, accurate customer service. An optional foot pedal enables remote hands-free operation.


  •  Accommodates a wide range of samples and sizes with measurement capability of 14mm or larger on materials such as paper, plastic, fabric, and a variety of hard surfaces.
  •  Flat or complex samples can be measured in as little as two second for fast color data acquisition.
  •  Its dampened, flip back targeting shoe and remote measurement trigger make it easy to measure difficult-to-handle samples.
  •  Providing the ultimate in versatility, the Ci51 can be used as a tethered handheld or mounted as a small footprint benchtop instrument
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Short Term Repeatability - White .10 ΔE*ab on white ceramic
Measurement Geometry d/8°
Inter-Instrument Agreement 0.30 ΔE*ab avg.
Illumination Spot Size 14mm
Lamp Life Approx. 500,000 measurements 
Light Source Gas-filled tungsten lamp
Measurement Cycle Time ≈ 2 seconds
Measurement Spot 8mm
Measurement Time ≈ 2 seconds
Photometric Range 0 to 200%
Photometric Resolution 0.01%
Spectral Analyzer Blue-enhanced silicon photodiodes
Spectral Interval 10nm
Spectral Range 400nm-700nm
Spectral Reporting 10nm
Reflectance Aperture(s) 1
Humidity 5% to 85%, non-condensing
Operating Temperature Range 50° to 104°F (10° to 40°C)
Storage Temperature Range '-4° to 122°F (-20° to 50°C)
Dimensions (length, width, height) 21.3 cm 9.1 cm 10.9 cm
Weight 1.06 kg
Package Dimensions (length, width, height)  36cm, 30cm, 20cm
Shipped Weight '4kg
Communication Interface USB 2.0
Instrument Display Backlit Color Graphic LCD
Software Development Kit XDS4
100-240VAC 50/60Hz, 
12VDC @ 2.5A
Calibration White and Zero
Sample Preview Targeting window
Transform Support Embedded
Warranty 12 months
What's Included? Instrument with white calibration standard, black trap, manual(CD), AC adapter, USB cable

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W Series

The W Series product bundles from X-Rite present 5 different combinations of software and color measurement instruments to meet the needs of retail paint operations of all sizes.


ColorDesigner PLUS

For Formulating Retail Paint at Point-of-Sale

ColorDesigner PLUS color matching software is customer- and retailer-friendly, producing expert results in a flexible, adaptable workflow that can be configured for individual needs.

Quick Compare

Short Term Repeatability - White .10 ΔE*ab on white ceramic .10 ΔE*ab on white ceramic
Short Term Repeatability - Blue
Measurement Geometry d/8° d/8°
Measurement Time ≈ 2 seconds ≈ 2 seconds
Photometric Range 0 to 200% 0 to 200%
Spectral Interval 10nm 10nm
Spectral Range 400nm-700nm 400nm-700nm
Spectral Reporting 10nm
Color Differences
Color Spaces
Standard Indices
Instrument Display Backlit Color Graphic LCD
Industry Standards

Need a Quote? Contact Sales(888) 800-9580

Technical Questions? Contact Support(888) 826-3042