The NIRMaster Pro IP65 is the world’s first dedicated FT-NIR standalone spectrometer with IP65 protection class. Its hygienic design is certified to be resistant to water jet cleaning procedures. It fully meets the requirements for safety of quality control instruments used in dairy and meat food production. View more
FT-NIR at highest protection


  • Maximum reliable reads through vibration proof FT polarization interferometer
  • Permanent performance verification through automated internal standard checks
  • Safe operation due to embedded industry standard PC
  • Continuous operation with twin-lamp safeguard

Best results

  • Highly reproducible results with polarization FT-NIR technology
  • Precise measurement of multiple parameters simultaneously
  • Exact data through top wavelength precision guaranteed by internal laser system 


  • Certified for complete dust and pressurised water jet protection (IP65)
  • Easy-clean hygienic design 
  • Compatible with standard IP65 monitors and keyboards
NIR Polarization Interferometer wedges

The BUCHI polarization interferometer

BUCHI has adapted the successful quartz polarization interferometer by using crystals with a very high refractive index. This leads to optimum resolution and a compact design maintaining the advantage of insensitivity to mechanical disturbances. The reason for the superior performance of this interferometer in rough environments is the difference of spatial movements and the optical path shifts for the two light beams in a birefringent crystal of variable thickness. Whereas in a Michelson type interferometer mechanical distortions directly affect the interference, such effects are reduced by a factor of 10 to 20 in a crystal interferometer.  
NIRMaster PRO IP&65 water jets

Easy-clean design increases food safety day by day

The hygienic easy-clean design and high ingress protection (IP) support your routine work in harsh environments. The NIRMasterTM is available in food-grade PMMA housing or stainless steel housing with IP54 or IP65.
FT-NIR Twin Lamp Module

The twin lamp module

BUCHI has set a new standard in terms of the availability of an NIR spectrometer.Our NIR spectrometers are equipped with a twin lamp module, which will automatically switch to a second integrated lamp in the event of a failure of the primary source. This minimizes the risk of an instrument failure, and sufficient time is left to order a replacement lamp. Meanwhile you can continue your measurements without further intervention.
Expert Advice

What are my commercial benefits of using NIR spectroscopy?

Research and quality control laboratories benefit from NIRS alike. While researchers can accelerate their experimentation, QC departments benefit from the ability to analyze hundreds of samples per day – both saving substantial amounts of time and money.

How does a polarization interferometer work?

The heart of the interferometer consists of two bi-refringing crystal wedges. By moving one wedge, a part of the light undergoes a phase shift. This phase shift alters the polarization of the entire beam. After passing a polarization filter the interferogram is detected. All wavelengths are measured simultaneously.

Do I need to calibrate my BUCHI FT-NIR spectrometer?

There is no need for instrument calibration. The term “calibration” is used in NIR with two different meanings:
  • Unlike other NIR instruments, the BUCHI instrument does not need to be calibrated since the accuracy is ensured by internal standards and permanent laser-aided alignment.
  • In NIR spectroscopy a calibration model is generally required to interpret sample data. This model needs to be developed on setup of the application. BUCHI’s NIRCal software makes it straight forward to develop robust and reliable calibrations by correlating NIR data with reference analytics.

What are the benefits of BUCHI’s FT-NIR with polarization interferometer?

NIR Polarization Interferometer wedges
BUCHI’s FT technology combines accuracy and robustness. Fourier Transform spectrometers grant high wavenumber accuracy and best signal to noise ratio. Polarization interferometers are insensitive to mechanical disturbances and hence ideal for rough environments.

Can I work with a BUCHI spectrometer in any environment?

Yes, the NIRFlex N-500 is a benchtop spectrometer mostly for laboratory use. The NIRMaster™ and NIRMaster™ Pro provide high ingress protection and are therewith ideal for benchtop analysis at production sites. The NIR-Online™ provides analyis in real time directly on the prodcution line.

What does IP54 and IP65 stand for?

IP: Ingress Protection against dust and water
  • 54: limited dust protection (5_); splash water protection (_4)
  • 65: total dust protection (6_); water jet protection (_5)

What is the optimal resolution for an NIR Spectrometer?

For modern instruments 8 cm-1 resolution is optimal for NIR measurement. As NIR spectral bands are relatively broad, higher resolutions do not improve the performance of NIR application. On the contrary, higher resolution spectra have a poorer signal-to-noise ratio within a given measurement time.

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