Compact FTIR spectrometer Interspec 311

Interspec 311 with horizontal one bounce ATR accessory with pressure applicator

Interspec 311 with transmission accessory


Wavelength range, IR 7000 to 400 cm-1
Wavelength range, ZnSe 5000 to 600 cm-1
Resolution 2 cm-1
Interferometer Pendulum type with roof mirrors
Beamsplitter, standard IR Multicoated KBr
Beamsplitter, option IR Multicoated ZnSe
Frequency reference VCSEL laser
IR source ceramic
Dessiccant possibility Yes
Interface USB
Data acquisition system 24 bit, high speed
Power 12 VDC, 30W
Dimensions, spectrometer W22xD21xH19 cm
Dimensions, sampling unit W8xD8xH5(16) cm
Footprint 21×22 cm
Weight 10 kg
Temp. environment 15 – 28 0C
Humidity environment Best below 65%


Interspec 311 FTIR spectrometer provides high performance in a compact size and at an affordable price. Combining flexible sample handling outside the instrument and leading Interspec for Windows software, the Interspec 311 FTIR spectrometer is a great solution for industrial, government or academic labs.

It implements the same field-proven FTIR technology found on other Interspec FTIR models using pendulum type roof mirror interferometer. The lightweight design and small footprint of the Interspec 311 FTIR spectrometer enables you to bring the spectrometer where you need answers most: from your busy laboratory to the production floor or in the warehouse.

With the wavenumber range from 7000 to 400 cm-1 (KBr optics) or from 5000 to 600 cm-1 (ZnSe optics) and spectral resolution of 2 cm-1, the spectrometer forms an open architecture type sample compartment outside the spectrometer capable to use different accessories for transmission, reflection and ATR measurements.

Open architecture type sample compartment

Open architecture type sample compartment allows to use accessories for transmission, reflection and ATR measurements.

311 with accessories

311 with accessories


Interspec for Windows 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 import and export is possible in ASCII, Excel, SPC or JCAMP formats. Other FTIR spectroscopic softwares like Essential FTIR or Panorama for running the spectrometer and for complete handling of measured infrared data are available as an option.



Interspec 311 – Standard compact FTIR spectrometer with KBr optics.

Interspec 311Z – Non-hygroscopic compact FTIR spectrometer with ZnSe optics

Interspec 311 Liquids Data sheet – DOWNLOAD

Interspec 311 ATR Data sheet – DOWNLOAD

Interspec 311 Data sheet – DOWNLOAD

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