Presentation is loading. Please wait.

Presentation is loading. Please wait.

NIR Sensor Technology-Spectroscopy Moving Grating-Scanning Monochromator AOTF MEMS FTIR Filter Photometer Fixed Grating-Diode ArrayFixed Grating-Diode.

Similar presentations


Presentation on theme: "NIR Sensor Technology-Spectroscopy Moving Grating-Scanning Monochromator AOTF MEMS FTIR Filter Photometer Fixed Grating-Diode ArrayFixed Grating-Diode."— Presentation transcript:

1 NIR Sensor Technology-Spectroscopy Moving Grating-Scanning Monochromator AOTF MEMS FTIR Filter Photometer Fixed Grating-Diode ArrayFixed Grating-Diode Array

2 Acquisition Time FTNIR ~ 8 seconds AOTF~10 seconds NIR Diode Array~1 sec or less Scanning Monochromator~30 seconds 50 X 20 msecs = 1 sec In presentation by Martin Warman, Pfizer, Inc. at IFPAC 2004

3 Types of NIR Spectrometers ScanningDevices Moving Grating- Scanning Monochromator AOTF MEMS FTIR Non-Scanning Devices Filter Photometer Fixed Grating- Diode ArrayFixed Grating- Diode Array

4 Multiple-sensor detection (CCDs, diode arrays) An avenue to avoid interference and ambiguity

5 Sample For the following unit operations: 1.Blending 2.Coating 3.Drying 4.Granulation 5.Roller Compaction 6.On-Line Content Uniformity The Sample is Moving!

6 Resolution & Spectral Range How much resolution do you need? What are spectral signatures of the materials you are looking at typically in the NIR spectral range? What spectral range is adequate?

7 NIR Diode Array Specifications No of PixelsSpectral Range nm Resolution nm 128900-17006.5 256*900-17003.25 512900-17001.6125 1024900-17000.8 Standard InGaAs – 1.7 micron * Most popular choice

8 NIR Diode Array Specifications No of PixelsSpectral Range nm Resolution nm 1281100-22008.8 256*1100-22004.4 5121100-22002.2 1024**1100-22001.1 Extended InGaAs – 2.2 micron * Most popular choice ** Not readily available

9

10

11 Other Desirable Features Ruggedness Diode Array spectrometers have no moving parts Ease of use Low Maintenance

12 Unique Features of CDI NIRS Automated built in references for wavelength and amplitude, can add customer specific references Do not have to remove from vessel to do OQ, can be done on the fly, even during experiment Meets USP 1119 specifications-generates report Dual redundant light source All in one package, Class I Div II, EP available

13 Instrument Rating Pentagon Score: 0 = low; 5 = high Cost Robustness Index Ease of use Richness of data Speed of Acquisition 1998 1998


Download ppt "NIR Sensor Technology-Spectroscopy Moving Grating-Scanning Monochromator AOTF MEMS FTIR Filter Photometer Fixed Grating-Diode ArrayFixed Grating-Diode."

Similar presentations


Ads by Google