General

The INTERSPEC series FTIR modules are stable, rugged units requiring the minimum of external utilities.

*The sealed, desiccated enclosure keeps the interferometer dry

*The IR/NIR source does not require water cooling

*The interferometer mechanical bearing does not require a gas supply.

For easy access, those system components which have a finite lifetime (i.e. laser, and radiation source) are located at the front side of the module. A yellow LED indicator indicates, when the scanning is turned on.

Interferometer Performance

The interferometer compartment under cover is 250 x 250 mm wide and 140 mm high. The Interspec 401-X series of instruments employ a sealed and desiccated interferometer, ensuring high spectral integrity with low levels of water vapour within the interferometer. We also offer a version (401-XZ) that employs a ZnSe moisture insensitive optics to be impervious to water vapour and can be used to advantage in serious tropical environment's.

Near infrared version (401-XN) employs a fused silica optics and is insensitive to any influence of water vapour.

Resolution in the infrared is available factory default from 2 cm^-1 to 32 cm^-1 (option 0.5 and 1 cm^-1). The overall wavelength range is 7000 to 400cm^-1 (IR) or 15000 to 3000 cm^-1 (NIR).

Extending Wavelength Ranges

In order to facilitate the use of more than one beam splitter or detector , provision has been made to interchange the beam splitter and detector assemblies allowing the Interspec 401-X to be used at any wavelength from 15000 to 400 cm^-1.

Detector Unit Option

IR or NIR detector unit with collimating off-axis metal mirrors is available as an option. In case of IR spectral region a selected high sensitivity DLATGS pyroelectric detector is available. In case of NIR spectral region two types of photodiodes are available: Si and InGaAs. The Si detector spectral range is 0.4 to 1.1 µm. The InGaAs detector is available in two versions: with normal spectral range (0.9 to 1.7 µm) and with long cut-off wavelength spectral range (1.2 to 2.6 µm).

Sofware option

Interspec for Windows software is available as an option. The software is supplied on CD and provided with each system shipped. The software includes features for all standard analytical requirements including manipulation of spectral data, instrument control, plot with preview on the screen plus many others. Also included are several facilities for analytical modelling of interferogrammes or spectra, with smoothing, and baseline correction, interactive editing and data manipulation . Also spectral subtraction, mixture subtraction, smoothing derivatives, plot with preview etc. Data input and output is possible in ASCII or JCAMP

Sample Handling

Interspec 401-X series instruments may be used as an heart of a more complex spectroscopic system. Sampling handling and the whole system is defined by the customer.

Models

Interspec 401-X - Standard FTIR Portable Instrument with KBr optics.
Interspec 401-XZ - Non Water Sensitive FTIR Portable Instruments for High Humidity with ZnSe optics
Interspec 401-XN - Near Infra Red Portable Instrument with fused silica optics.

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