CS-2000A Spectroradiometer

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CS-2000A Spectroradiometer

The CS-2000A is a highly accurate spectroradiometer with the ability to measure ultra low luminances, as low as 0.0005 cd/m2, and contrast levels of 1,000,000:1. To achieve this, the instrument uses technology to reduce sensor signal noise, a measurement angle of 1°, and by maintaining less than 5nm half bandwidth.

CS-S10w Professional Data Management Software is included as a standard accessory, enabling highly accurate measurement visualization and management. Acceptance judgments based on the dominant wavelength can be completed with this software.

The CS-2000A features a measurement angle switching function which allows the user to select a specified measurement angle of 0.1°, 0.2°, or 1° depending upon the application. This enables a standard minimum measuring diameter of 0.5mm. A close-up lens (optional accessory) can be purchased to measure areas as small as 0.1mm. This enables the instrument to measure general displays and quick and stable luminosity and chromaticity measurements of ultra-small areas such as automotive or aircraft instrument panels and audio systems.

By attaching a diffuser adapter for illuminance measurement (optional accessory) enables the CS-2000A to accurately perform spectroscopic measurements of illuminance and chromaticity of irradiated light.

Click Here to View CS-2000 & CS-2000A Spectroradiometers Video


  • Eligible ISO 17025 Certification
  • Detects ultra-low luminances – as low as 0.0005 cd/m²
  • Scotopic Vision
  • Measuring angle switching function
  • Easily measure small areas – as small as 0.1mm
  • Illuminance measurement


Model CS-2000A
Wavelength range 380 to 780 nm
Wavelength resolution 0.9 nm/pixel
Display wavelength bandwidth 1.0 nm
Wavelength precision +-0.3 nm (Median wavelength: 435.8 nm, 546.1 nm, 643.8 nm; Hg-Cd lamp)
Spectral bandwidth 5 nm or less (half bandwidth)
Measuring angle (selectable) 0.2° 0.1°
Measurement luminance range (Standard light source A) 0.0005 to 5,000 cd/m² 0.0 125 to 125,000 cd/m² 0.5 to 500,000 cd/m²
Minimum measuring area Φ5 mm ( Φ1 mm when using close-up lens) Φ1 mm ( Φ0.2 mm when using close-up lens) Φ0.5 mm ( Φ0.1 mm when using close-up lens)
Minimum measuring distance 350 mm (55 mm when using close-up lens)
Minimum spectral radiance display 1.0×10(-9) W/sr, m(2), nm
Accuracy: Luminance *1(Standard light source A) +-2%
Accuracy: Chromaticity *1(Standard light source A) x,y :+-0.002 (0.001 to 0.005 cd/m²)
x,y :+-0.0015 (0.05 cd/m² or more)
y :+-0.001 (0.05 cd/m² or more)
x,y :+-0.002 (0.025 to 1.25 cd/m²)
x,y :+-0.0015 (1.25 cd/m² or more)
y :+-0.001 (1.25 cd/m² or more)
x,y :+-0.002 (0.01 to 5 cd/m²)
x,y :+-0.0015 (5 cd/m² or more)
y :+-0.001 (5 cd/m² or more)
Repeatability: Luminance(2σ) (Standard light source A)*2 1.5 % (0.0005 to 0.001 cd/m²)
0.7 % (0.001 to 0.003 cd/m²)
0.25 % (0.003 to 0.05 cd/m²)
0.15 % (0.05 to 5,000 cd/m²)
1.5 % (0.0125 to 0.025 cd/m²)
0.7 % (0.025 to 0.075 cd/m²)
0.25 % (0.075 to 1.25 cd/m²)
0.15 % (1.25 to 125,000 cd/m²)
1.5 % (0.05 to 0.1 cd/m²)
0.7 % (0.1 to 0.3 cd/m²)
0.25 % (0.3 to 5 cd/m²)
0.15 % (5 to 500,000 cd/m²)
Repeatability: Chromaticity(2σ)(Standard light source A) *2 x:0.003 y:0.0035 (0.001 to 0.003 cd/m²)
x:0.001 y:0.0015 (0.003 to 0.1 cd/m²)
x,y:0.0006 (0.1 to 0.2 cd/m²)
x,y:0.0004 (0.2 to 5,000 cd/m²)
x:0.003 y:0.0035 (0.025 to 0.075 cd/m²)
x:0.001 y:0.0015 (0.075 to 2.5 cd/m²)
x,y:0.0006 (2.5 to 5 cd/m²)
x,y:0.0004 (5 to 125,000 cd/m²)
x:0.003 y:0.0035 (0.1 to 0.3 cd/m²)
x:0.001 y:0.0015 (0.3 to 10 cd/m²)
x,y:0.0006 (10 to 20 cd/m²)
x,y:0.0004 (20 to 500,000 cd/m²)
Polarization error 1°: 2 % or less(400 to 780 nm): 0.11° and 0.21° or less: 1, 3 % or less(400 to 780 nm):0.1 0.2
Integration time Fast: 0.005 to 16 sec.; Normal: 0.005 to 120 sec.
Measurement time Approx 2 seconds minimum (manual mode) to 247 sec maximum (Normal mode)
Color space mode Lv x y, Lv u’; v’;, Lv T Δuv, XYZ, spectral graph, dominant wavelength, excitation purity, scotopic luminosity (with CS-S10w Professional)
Interface USB 1.1
Operating temperature/ humidity range 5 to 35°C, relative humidity 80% or less with no condensation
Storage temperature /humidity range 0 to 35°C, relative humidity 80% or less with no condensation
Power AC adapter (100 to 240V~,50/60 Hz)
Current consumption Approx. 20 W
Size 158 (W) x 262 (H) x 392 (D) mm (Main unit) ø70 x 95mm (Lens)
Weight 6.2 kg
*1 Average of 10 measurements in NOrmal mode at temperature of 23+- 2°C and a relative humidity of 65% or less
*2 10 measurements in NOrmal mode at a temperature of 23 +-2°C and a relative humidity of 65% or less

Included Accessories

AC Adapter (120 V)
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AC Adapter (AC-A312)
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AC Adapter Package
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AC Cable
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CS-S10W Software Prof. Vers. (USB) 1.6
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USB Cable – CS-A32
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