The latest iteration of Jeti’s Specbos range of spectroradiometers, the Specbos 2501 builds on and improves the highly successful Specbos 1201 and 1211. Offering the same versatility, the Specbos 2501 can be configured for measuring a spot spectral radiance (luminance) and by attaching optional cosine diffuser, the Specbos 2501 can also be used to measure spectral irradiance (illuminance).
Being a spectroradiometer, the Specbos 2501 measures the spectral radiance or irradiance of the light source or display between 380 and 780nm (380-1100nm for the NIR model, 200nm-1100nm for the UV model) and accurately computes all of the derived photometric and colorimetric parameters, including luminance, illuminance, CIE chromaticity, correlated colour temperature (CCT) and colour rendering index (CRI), as well as circadian and other radiometric parameters. Accessory focussing optics are available to reduce the measurement area down to as small as 0.5mm diameter.
Spectroradiometer JETI Specbos 2501 is the further development of the successful Specbos 1211-2 models as well as the Spectraval series.
Key Features
Available Models
Focus add-on will be available for all models.
Specifications of Specbos 2501 Spectroradiometer
Spectral Range | Specbos 2501 380 – 780 nm Specbos 2501-NIR 380 – 1100 nm Specbos 2501-UV 200 – 1100 nm |
Optical Resolution (FWHM) | 4.0 nm (all versions); 2.0 nm (specbos 2501-HiRes) |
Wavelength Resolution | 1.0 nm |
Digital Electronic Resolution | 16 bit ADC |
Viewing Angle | 1.8° (Radiance mode) |
Measuring Distance/ Diameter | 20 cm – Ø 7 mm; 100 cm – Ø 33 mm (measured from front end of the device) |
Measuring Values | Spectral Radiance, Luminance, total Radiance, x,y, u’,v’, CCT, CRI, colour purity, RGB, PAR, TLCI, circadian metrics and others With optional diffusor – Spectral Irradiance/ total Irradiance/ Illuminance |
Luminance Measuring Range | 0.2 … 150 000 cd/m² (Illuminant A) 0.2 … 100 000 cd/m² (typical warm white LED) (Higher values with optional filter) |
Luminance Accuracy | ± 3.5 % (Illuminant A @ 100 cd/m2, k=2) |
Luminance Reproducibility | ± 1 % |
Chromaticity Accuracy | ± 0.002 x, y (Illuminant A, k=2) |
Colour Reproducibility | ± 0.0005 x, y (Illuminant A) |
Illuminance Measuring Range | 1 – 800 000 lx (Illuminant A), 1 – 500 000 lx (typical warm white LED) |
Illuminance Accuracy | ± 2.4 % (Illuminant A @ 2000 lx, k=2) |
CCT Reproducibility | ± 20 K (Illuminant A) |
Max. Wavelength Error | ± 0.3 nm (HgAr line source) |
Polarization Error F8 | < 1 % |
Dispersive Element | Imaging grating (flat field) |
Light Receiving Element | Back thinned CMOS/ CCD array 2048 pixels |
Power Supply | USB Hub powered, optionally PoE |
Interface | USB 3.0 and Bluetooth (Specbos 2501) USB 3.0 and LAN (Specbos 2501-LAN) |
Dimensions (L X B X H) | 186 mm x 105 mm x 50 mm |
Weight | 1000 g |
Operating Conditions | Temperature 10 – 40 °C Humidity < 85 % relative humidity at 35 °C |
Accessories (Included) | PC software JETI LiVal for Windows 10/ 11, operating instructions and software development kit on USB flash drive, USB cable, battery charger, tripod, carrying case, protection cap, calibration certificate |
Accessories (Optional) | Integrating sphere, filters, side view and fiber extended diffusors, add-on optics |
Calibration | NIST traceable, recommended recalibration interval: 1 year |
Examples for applications of Specbos 2501 / 2501-HiRes / 2501-NIR:
Examples for applications of Specbos 2501-UV:
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