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Spectra Vista HR-640i. 350 – 2500 nm Field Spectroradiometer popular for agriculture applications

The SVC HR-640i field spectroradiometer is our full range 350 nm to 2500 nm instrument with medium spectral resolution in the SWIR for agricultural applications.



HR-640i Field Spectroradiometer

Spectral Range350 nm – 2500 nm
Internal Memory1000 scans
Linear Array(1) 512ch Si, 350 – 1000 nm
(1) 64ch InGaAs, 1000 – 1890 nm
(1) 64ch Extended InGaAs, 1890 – 2500 nm
Spectral Resolution (FWHM)≤ 3.3 nm, 700 nm
≤ 30 nm, 1500 nm
≤ 28 nm, 2100 nm
Bandwidth (nominal)≤ 1.5 nm, 350 – 1000 nm
≤ 14 nm, 1000 – 1890 nm
≤ 10 nm, 1890 – 2500 nm
Minimum Integration1 millisecond
FOV4˚ standard, 8˚ or 14˚ optional
25˚ optional armored fiber optic
Noise Equivalent Radiance
≤ 0.8 x 10-9 W/cm2/nm/sr @ 700 nm
≤ 1.0 x 10-9 W/cm2/nm/sr @ 1500 nm
≤ 1.0 x 10-9 W/cm2/nm/sr @ 2100 nm
Stand Alone Measurements
(no computer required)
Calibration Accuracy
(NIST Traceable)
±5% @ 400 nm
±4% @ 700 nm
±7% @ 2200 nm
Wavelength Reproducibility0.1 nm
Dark Current CorrectionAutomatic/selectable
Spectrum AveragingAutomatic/selectable
Physical Specifications
Head Size8.75” x 11.5” x 3.0”
Weight8.5lbs., 3.8kg
Digitization16 bit
Battery Type7.4 V lithium ion
Battery Life3 hours approximately
Host Communicationswireless Bluetooth
SealingSealed against dirt and dust
Tri-pod MountingStandard 1/4-20 Camera mounts
SightingLaser diode

HR-640 Details

The SVC HR-640i field spectroradiometer provides high quality spectral data across the full spectral region from 350 nm to 2500 nm. The spectral resolution in the SWIR region is suitable for many applications in forestry, agriculture and environmental assessment.

Designed for maximum optical performance the SVC HR-640i has:

  • Co-aligned symmetrical and uniform field of view
  • Full conical field of view eliminating spectral discontinuities and step discontinuities at the spectrometer sensor interfaces
  • Conical field of view gives better measurement data for all surfaces, especially heterogeneous surfaces

Sample Scans

Indoor Reflectance Scan

Outdoor Reflectance Scan

Outdoor White Panel Radiance


And the HR-640i field spectroradiometer delivers the high quality data with industry leading ease of use:

  • Data stored in the built-in computer – no external computer to carry in the field
  • Scene photos and GPS coordinates stored with every file, so you know exactly what the conditions were for each scan
  • Two Bluetooth devices allows the instrument to receive data from an external sensor suite containing up to 16 separate sensors. The sensor suite can include downwelling sensors supplying instantaneous broad or narrow band solar response. The sensor data is stored with the spectral data file, allowing the researcher to understand changes in solar irradiance and assist in corrections
  •  Other environmental sensors are available.