Wavelength range, IR 7000 to 400 cm-1
Wavelength range, NIR 14000-5800 or  to 9000 – 3850 cm-1
Resolution, standard 1 cm-1
Resolution, option 0.5 cm-1
Interferometer Pendulum roof mirror type
Beam diameter 30 mm.
Aperture ratio f 3.2
Beamsplitter, standard IR Multicoated KBr
Beamsplitter, option Multicoated ZnSe
Beamsplitter, standard NIR Fused Silica
Frequency reference VCSEL laser
Emission port Option
Sample compartment W20xD26xH16 cm
Beam at sample 10 mm dia.
Accessories Ordinary FTIR accessories
IR source High intensity air cooled ceramic
NIR source Quartz-halogen lamp
Detector, IR Standard low noise DLATGS
Detector, IR Option MCT
Detector, NIR Si, InGaAs photodiode
Data acquisition system 18 bit, high speed
Purge possibility Yes
Operating system Windows based
Interface USB 2.0
Power 12VDC, 30 W
Dimensions W59xD39xH19 cm
Weight 24 kg
Temp. environment 15 – 28 0C
Humidity environment Best below 65%


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 15000:1. Resolution in the infrared is available 1 cm-1 and programmable up to 32 cm-1 (option 0.5 cm-1). The overall wavelength range is 7000 to 400cm-1 (IR) or 14000 to 3000 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 14000 to 400 cm-1.

Beam Splitters Range subject to coatings
KBr 7000 to 400 cm-1
ZnSe 5000 to 600 cm-1
Fused silica 14000 to 3000 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.


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 like Essential FTIR or Panorama for features such as Library Search.

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 Interspec series FTIR spectrometers. 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

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 11500C. 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.


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.

Interspec 200-X Data sheet – DOWNLOAD