InterferometerMain Features

      • High sensitivity and stability
      • Intelligent real-time monitoring of instrument status
      • Multiple communication options
      • Flexible and convenient testing
      • Powerful software workstation
      • CFR 21 Compliant Software
      • 19 Libraries with approximately 11000 spectrums is included in the software


High sensitivity optical system: cube-corner Michelson interferometer combined with patented fixing mirror alignment technology to ensure long term stability, without the need of dynamic alignment. Reflecting mirrors are coated with gold to provide the maximum light throughput and ensure the detection sensitivity.

High stability modular partition design: compact structure modular design with layout on cast aluminum base and overall balance of mechanical robustness and partition heat dissipation, offering higher ability of deformation resistance and less sensitive to vibrations and thermal variations, greatly improves the mechanical stability and long term working stability of the instrument.

Intelligent multi-sealed moisture-proof design: multiple sealed interferometer, large-capacity desiccant cartridge with visible window and easy replacement structure, real-time monitoring of temperature and humidity inside the interferometer, getting rid of influences of high temperature, high humidity and chemical corrosions to the optical system in many ways.

Innovated integration electronic system: high sensitivity integrated DLATGS detector pre-amplifier technology, dynamic gain amplification technology, high precision 24-bit A/D conversion technology, real-time control and data processing technology, digital filter and network communication technology, ensuring high quality real-time data collection and high-speed transmission.

Good anti-electromagnetic interference capability: The electronic system is designed to meet CE certification and electromagnetic compatibility requirements, minimizing electromagnetic radiation in design and technology in line with the ‘environmentally friendly’ designing concept.

High intensity IR source assembly: High intensity, long lifetime IR source module, with the highest energy distributed in fingerprint region, adopts a reflex sphere design to obtain even and stable IR radiation. External isolated IR source module and large space heat dissipation chamber design provide higher thermal stability and stable optical interference.

The sampling compartment, reserving accessory mounting holes on the base plate, is wide enough for various accessories such as Defused/Specular Reflection, ATR, Liquid cell, Gas cell, and IR microscope etc.


Some of the Spectrum Libraries Included with Software

Polymer library  
Polymer Chemical library  
Art Media library  
Fiber library    
Organic Reagent library  
Organic Reagent solid library  
Inorganic Reagent library  
Surfactant library  
Minerals library  
Georgia State Crime Laboratory drug library
Vapour Phase library

Main Specifications

The main specifications of PG Instruments 7800 FTIR spectrometer are as follows:

      1. Wavelength range: 7800 cm-1 ~ 350 cm-1
      2. Resolution: better than 1cm-1
      3. Wavenumber precision: ±0.01cm-1
      4. Transmittance repeatability: 0.5%T
      5. 100%T line SNR: better than 20,000:1 (RMS value, at 2100cm-1, 4 cm-1 resolution, DTGS detector, 1 minute data collecting)
      6. Software in FULLY compliant with CFR21 Part 11
      7. 100% line T inclining:

Wavelength (cm-1                                                       100%T line (%T)

500 ~ 800                                                                                 98.0 ~ 102.0

1900 ~ 2200                                                                            99.5 ~ 100.5

2800 ~ 3200                                                                           99.5 ~ 100.5

4000 ~ 4400                                                                           98.5 ~ 101.5


  • pg instruments FTIR7800
  • Air Spectrum
  • Polystyrene Film Spectrum
  • Single reflection ATR (Diamond crystal)
  • pg instruments FTIR7800
  • Home Software Screen
pg instruments FTIR78001 Air Spectrum2 Polystyrene Film Spectrum3 Single reflection ATR (Diamond crystal)4 pg instruments FTIR78005 Home Software Screen6 BACKGROUND (AIR SPECTRUM)7 SPECTRUM WINDOW AND SPECTRUM INFORMATION AREA8