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ASD - FieldSpec - 4 Wide-Res Field Spectroradiometer

The high performance, cost effective spectroradiometer solution

The wide optical slit the FieldSpec 4 Wide–Res spectroradiometer provides the highest signal throughput and offers the best signal to noise performance of any FieldSpec model. These high throughput characteristics also benefit field measurements taken in less than optimal illumination conditions.

The 30 nm SWIR resolution of the FieldSpec 4 Wide-Res spectroradiometer makes it an ideal fit for applications such as vegetation analysis and vegetation indices that are characterized by broad spectral features. This instrument is also available at a significantly lower price point than other FieldSpec models, which makes it an attractive option when budgets are tight.

The 3 nm VNIR, 30 nm SWIR spectral resolution of the FieldSpec® 4 Wide-Res field spectroradiometer, is a cost-effective solution for the analysis of any material with broad spectral features. General vegetation analysis and water column studies are common application areas that are associated with broader spectral features.

The FieldSpec 4 Wide-Res field spectroradiometer can be utilized for many of the same applications as the Standard-Res model although the characterization of material with sharper spectral features will be less precise. The FieldSpec 4 Wide-Res is not recommended for the analysis of materials and compounds with narrow or sharp geological spectral features in the SWIR range such as alteration mineralogy or atmospheric/gas studies.


Because of its wider optical slit the FieldSpec Wide-Res field spectroradiometer delivers the best signal throughput of any FieldSpec spectroradiometer. High throughput benefits measurements taken in low illumination conditions.
This instrument is available at a significantly lower price point than other FieldSpec 4 models, which makes it an attractive option when budgets are tight.
In addition to being a cost-effective field spectroradiometer, the FieldSpec 4 Wide-Res also functions well as a rugged, field spectrometer for accurate contact reflectance or non-solar stand-off measurements.

Technical Specification

Spectral Range 350-2500 nm
Spectral Resolution 3 nm @ 700 nm
30 nm @ 1400/2100 nm 30 nm @ 1400/2100 nm
Sampling Interval 1.4 nm @ 350-1000 nm
1.1 nm @ 1001-2500 nm 1.1 nm @ 1001-2500 nm
Scanning Time 100 milliseconds
Stray light specification VNIR 0.02%, SWIR 1 & 2 0.01%
Wavelength reproducibility 0.1 nm
Wavelength accuracy 0.5 nm
Weight 5.44 kg (12 lbs)

Key Features

  • Higher resolution hyperspectral sensors
  • Full-range detection capacity (350 nm – 2500 nm) provides uniform Vis/NIR/SWIR
  • Faster integration speed allows more measurements in a limited solar collection time window.
  • Graded index InGaAs photodiode SWIR detectors ensure seamless measurements in the 1001 nm – 2500 nm spectral range
  • Provide the smallest available spectral sampling interval (bandwidth) in a field portable device.
  • Seamless measurements in the 1001 nm – 2500 nm spectral range
  • Superior signal throughput and greatly improved radiometric calibration accuracy over signal-to-noise
  • Long-range wireless increases collection coverage potential from a stationary base of operations.
  • Permanent fiber optic cable design provides superior signal throughput over detachable fiber optic cable systems
  • Agriculture
  • Education & Academics
  • Environmental
  • Food & Beverage
  • Mining & Minerals
  • Oil & Gas
  • Pharmaceutical
ASD, Inc.ASD Inc., a Malvern PANalytical company, is the global leader in high-performance analytical instrumentation solutions, solving some of the most challenging real-world materials measurement problems. ASD spectrometers — unparalleled in providing laboratory-grade results in the field or on-site — are the instruments of choice for remote sensing, environmental sciences, agricultural, mining, pharmaceutical and pulp and paper industry applications, where results drive paradigm-changing insights, efficiency and profit.
[PANalytical, ASD, Geology, Mining, FieldSpec, TerraSpec, LabSpec, Remote Sensing, NIR system, SummitCAL, Spectral Acquisition]