CM-3700d Spectrophotometer (Discontinued)

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View our latest version of this instrument, the CM-3700A.

The CM-3700d spectrophotometer is a bench-top unit which provides the highest level in accuracy and reliability. It features a large sphere, aperture masks, and a complete optical system which exceeds international standard requirements. This instrument emits a high power xenon flash when a measurement takes place to ensure the most accurate measurement is taken. Users are able to switch the size of the measurement area depending on the needs of their application and can choose from 25.4mm, 8mm, and 3x5mm.

The CM-3700d easily measures reflective colors by with the ability to switch between SCI and SCE. Florescent colors can also be easily determined with the instrument s UV cut filters which allow 1,000-step adjustment of UV light, providing ideal measurement of paper, pulp, and other materials containing florescent materials. Also, diffused lighting allows transparent colors to be effectively measured. These unique features allow a wide range of applications to be measured including plastics, textiles, dyed items, kiln-fired materials, food, liquids, and others. The CM-3700d can be controlled by a PC via a USB cord. It is compatible with Windows programs, making data control and editing easy.

This instrument is compatible with SpectraMagic NX software which is easy-to-use and displays multiple views of data results which can be edited. Target data of the primary target can be associated to two or more secondary targets, allowing for sophisticated QC applications, such as checking for color difference.

A variety of graphs can be used to display information, preconfigured templates are available, and a status window is available to show instrument information at a glance. Data compiled with older software is compatible and can be transferred to the newest updated software. If Excel is needed to show data, the information can also be easily exported. A Navigation Function and Color Tutorial are included with the software for additional information.


  • Eligible ISO 17025 Certification
  • Highly accurate and reliable – utilizes state-of-the-art technology to make it one of the most reliable and accurate spectrophotometers available
  • Windows compatible – can be controlled from a computer with Windows software
  • Measurement area switching – users can choose between 25.4mm, 8mm, and 3x5mm measurement areas
  • Can measure reflective, fluorescent, and transparent color – using SCI/SCE switching, UV cut filters, and/or diffused lighting, reflective, fluorescent, and transparent colors can easily be measured
  • International standards – CIE, ISO, ASTM, DIN, and JIS are among the standards included in the CM-3700d
  • Xenon flash – enables the instrument to accurately measure even very dark shades


Illuminating/viewing system d/8 (diffused illumination; 8deg viewing angle); SCI (specular component included)/SCE (specular component excluded) switchable; meets ISO and DIN standards for d/8 geometry; also meets CIE and ASTM standards for d/0 geometry. Transmittance: d/0 (diffuse illumination/0deg viewing angle)
Detector Silicon photodiode array with flat holographic grating
Wavelength range 360nm to 740nm
Wavelength pitch 10nm
Half bandwitdh Approximately 14nm average
Photometric range 0 to 200%; Resolution: 0.001%
Light source Pulsed xenon arc lamp
Measurement time 0.6 to 0.8 sec. (to start of data output)
Illumination/measurement areas Reflectance: Changeable between LAV, MAV, and SAV
LAV: PHI 28mm illumination/PHI 25.4mm measurement
MAV: PHI 11mm illumination/PHI 8mm measurement
SAV: 5 x 7mm illumination/3 x 5mm measurement
Transmittance: Approx. PHI 20mm
Repeatability When white calibration plate is measured 30 times at 10-sec. intervals after white calibration has been performed: ;
Spectral reflectance: Standard deviation within 0.05%
Chromaticity: Standard deviation within Delta E*ab 0.005
When black tile (BCRA Series II; reflectance: 1%) is measured 30 times at 10-sec. intervals after white calibration has been performed:
Spectral reflectance: 380 to 740nm: Standard deviation within 0.02%
360 and 370nm: Standard deviation within 0.04%
Chromaticity: Standard deviation within Delta E*ab 0.05
Inter-instrument agreement (LAV) Mean Delta E*ab 0.08 (typical) Average for 12 BCRA Series II color tiles. Max Delta E*ab 0.3 (corresponds to Delta Ecmc 0.2) for any of 12 BCRA Series II color tiles compared to values measured with master body
Temperature drift Spectral reflectance: Within +-0.10%/deg C
Color difference: Within Delta E*ab 0.05/deg C
UV adjustment Computer controlled; continuously variable
Specimen conditions for transmittance measurements
Interface RS-232C standard; baud rates: 12,00, 2400, 4800, or 9600
Power AC 100V/120V/230V 50/60Hz (using included AC adapter)
Operating temperature/humidity range 13 to 33deg C, relative humidity 80% or less with no condensation
Storage temperature/humidity range 0 to 40deg C, relative humidity 80% or less with no condensation
Dimensions (W x H x D) 271 x 259 x 500mm (10-11/16 x 10-3/16 x 19-11/16 in.)
Weight 18kg (39.7 lb.)
Standard accessories White Calibration Plate; Target Mask (3 x 5mm); Target Mask (PHI 8mm); Target Mask (PHI 25.4mm); Zero Calibration Box; AC Adapter; RS-232C Cable (2m/6.6 ft., 9-pin, for IBM PC); Accessory Case CM-66
Optional accessories Color Data Software SpectraMagic NX; Transmittance Specimen Holder; Glass Cells (2mm, 10mm, 20mm); Plastic Cells (2mm, 10mm, 20mm); Transmittance Zero Calibration Plate; Color Tiles; RS-232C Cable (for IBM PC)

Included Accessories

CM-A52 RS-232C 9Pin IBM/PC2M
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CM-A69 Dust Cover (for CM-3700d)
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CM-A91 Target Mask (3x5mm)
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CM-A92 Target Mask (dia: 8mm)
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CM-A93 Target Mask (dia: 25.4mm)
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CM-A94 Zero Cal. Box
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CM-A100 Transmittance Zero Cal. Plate
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CM-A132 Plastic Cell (20mm) 100 per box
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CM-A53 RS-232C 25Pin IBM/PC2M
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CM-A66 Accessory Case
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CM-A96 Transmittance Specimen Holder
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CM-A97 Cell (2mm)
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CM-A98 Cell (10mm)
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Cell CM-A99 (20mm)
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