From light to result in a handheld workflow
1) Light emission
The analyser uses an internal light source to emit near-infrared radiation, typically across the 750 to 2500 nm range.
2) Absorption and reflection
Molecular bonds absorb specific NIR wavelengths. This creates a spectral pattern linked to overtone and combination vibrations, and that pattern changes with the type and concentration of the material.
3) Detection
The instrument measures the reflected or transmitted light after it interacts with the sample. The difference between what was emitted and what was detected forms the spectrum.
4) Analysis and reporting
Software processes the spectrum using chemometric methods to deliver rapid outputs. Depending on the model, this can be material identification, classification, or quantitative estimates such as moisture or grade.
In practice, portable NIR is used because it is rapid and non-destructive, often with little or no sample preparation. It is most effective when your workflow controls the basics that influence spectra, such as consistent contact with the sample, surface condition, and a calibration built for your target materials.
Considering portable NIR for your application
If you are evaluating NIR for field use, start with the technology fundamentals on the Near-Infrared Spectroscopy (NIR) technology overview and then compare form factors and use cases across the portable NIR analyser range.
For guidance on calibration fit, sampling approach, and whether NIR is appropriate for the materials you need to measure, you can also explore solutions with Portable Analytical Solutions or get in touch.