The Interspec 200-X series of FTIR spectrometers represent a low cost Fourier transform infrared spectrometers and employ a number of unique features that ensure high performance from a compact instrument. The Interspec 200-X measures just 59 X 39 X 19 cm and is regarded as one of compact and versatile infrared FTIR spectrophotometers. The design of the 200-X is unique both in terms of optical design and the software and firmware designed specifically to significantly reduce overall analytical times. The interferometer geometry is employing a new compact Michelson self compensating optical system that eliminates many of the optical alignment problems found in conventional type optical interferometers. The Interspec 200-X design avoids the use of conventional corner cube optics and dynamic alignment. In practice this means that the instrument can be used in the research laboratory, in any university or college environment and if required, can also be used outside laboratory or in remote locations.
Interferometer Performance All Interspec FTIR instruments offer high S:N ratios and can provide SNR up to 12000:1. Resolution in the infrared is available 2 cm-1 and programmable up to 32 cm-1 (option 0.5 and 1 cm-1). The overall wavelength range is 7000 to 400cm-1 (IR) or 15000 to 3850 cm-1 (NIR).
The Sample Compartment As you will see the sample compartment is large indeed and can accommodate all of the normal sample handling requirements relating to FTIR spectroscopy. This unique compartment will also accommodate the wide range of accessories supplied by specialist accessory manufacturers. Overall dimensions are W20 X D26 X H16 cm . The optical axis is 74.5 mm above the base of the sample compartment and there is free space of 90 mm above the optical axis to the underside of the lid.
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 200-X to be used at any wavelength from 15000 to 400 cm-1. Detector Options
The standard detector is a selected high sensitivity DLATGS pyroelectric design providing the highest possible signal to noise for all but the most demanding applications. However there are many applications in infrared spectroscopy where high resolution analysis is required for materials with high absorption characteristics and for these applications cryogenically cooled MCT detector options are available each with a specific wavelength range.
In case of NIR spectral region two types of photodiodes are available: Si and InGaAs.
Sofware Interspec for Windows 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. Other commercial programmes can be used including Thermo/Galactic GRAMS for features such as Library Search. The Interspec for Windows programme is written in 32 bit protected mode. Our unique software has been designed specifically for multi function applications, it is easy to use and it is provided free of charge. The utility of the Interspec for Windows programme can be extended by adding other commercial programmes such as search, component identification, Kramers Kronig Transform, Chemometrics, etc. to suit individual requirements.
Computer systems There are no special computer requirements for the Series 300-X. Computer options and performance change rapidly for both bench and lap top configurations. Computers have to meet at least the following minimum specifications: Processor Pentium 500 MHz Memory 32 Mbytes RAM Hard Disc 6.4 Gbytes CD ROM Yes
However other specifications are also possible subject to user requirements. The standard operating system is a Windows 98/XP platform. The computer can be ordered as a separate component with the instrument or the instrument can be interfaced to an existing computer providing it meets the specifications as defined.
Sample Handling Accessories The applications for FTIR are extensive and more use is being made of these techniques now than at any other time. Many of these new applications can be attributed to the development of a very large and comprehensive range of sample handling accessories made available from many accessory companies . All such accessories can be used in the Interspec 200-X series of instruments. So no matter what your sample is, we are able to offer just the right sample mount including accessories for ATR accessories , specular reflection, diffuse reflection, DRIFT, photo acoustic, liquid sampling, gas cells, gas purge systems, hydraulic or hand help sample presses, film making kits, sample grinders, micro sampling, disposable cells, polishing kits, polarisers, plus a lot more.
Air Cooled Infrared Source Our Infrared source is a long lifetime and trouble free operation device. The reason is simple in that our design achieves excellent wavelength emission characteristics and very high stability. The colour temperature of the source is about 12000C. In the NIR region a quartz-halogen lamp is used.
Desiccated and Sealed Interferometer The Interspec 200-X series of instruments employ a sealed and desiccated interferometer and detector compartment, ensuring high spectral integrity with low levels of water vapour within the interferometer. We also offer a version (200-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. Provision is made for purging should this be of interest to the user. Near infrared version (200-XN) employs a fused silica optics and is insensitive to any influence of water vapour.
Models Interspec 200-X - Standard FTIR Instrument with KBr optics. Interspec 200-XZ - Non Water Sensitive FTIR Instruments for High Humidity with ZnSe optics Interspec 200-XN - Near Infra Red Instrument with fused silica optics.
Wavelength range, IR 7000 to 400 cm-1 Wavelength range, NIR 15000 to 3850 cm-1 Resolution, standard 2 cm-1 (8 cm-1 - NIR) Resolution, option 1.0 or 0.5 cm-1 Interferometer Self aligning Beam diameter 30 mm Aperture ratio f 3.2 Beamsplitter, standard IR Multicoated KBr Beamsplitter, option ZnSe, CaF2, CsI Beamsplitter, standard NIR Fused Silica Frequency reference HeNe laser Emission port Option Sample compartment W20xD26xH16 cm Beam at sample 10 mm dia. Accessories Ordinary FTIR accessories IR source High intensity air cooled NIR source Quartz-halogen lamp Detector, IR Standard low noise DLATGS Detector, IR Option MCT Detector, NIR Si, InGaAs photodiode Purge possibility Yes Operating system Windows 98/XP Power 90-230 VAC, 12 VDC, 40 W Dimensions W59xD39xH19 cm Weight 24 kg Temp. environment 15 - 28 0C Humidity environment Best below 65%