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ATech: |
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ATech: |
| FT-NIR (Fourier Transform NIR) | Moving Grating |
|---|---|
| Excellent wavelength stability. | Most mature NIR spectrometer. |
| Highest resolution. | Moderate resolution. |
| Flexible set-up allows optimal use in multiple applications. |
Instrument-to-instrument calibration issues. |
| Detailed chemical composition analysis of mixtures of similar constituents. |
| Diode Array | Fixed Wavelength Diodes |
|---|---|
| Very high speed (< 0.1 sec) capability. | Reliability of no moving parts and semiconductor technology. |
| Excellent wavelength stability. | Wavelengths selected are fixed for application. |
| Fixed position of critical optical components. | High speed. |
| Must be optimized for resolution vs. wavelength range. |
| AOTF (Acousto-optical tunable filter) | FT-IR (Mid Infrared) |
|---|---|
| Reliability of no moving parts. | Similar to FT-NIR with more detailed composition analysis. |
| Flexibility of full spectrum or fixed wavelength operations by set-up parameters. |
Closest to the analytical capabilities of laboratory infrared analysis. |
| High speed. | Limited fiber optic capability and sample/spectrometer location issues makes this wavelength range less convenient for real-time process analysis. |