EPR Instruments


The EMXmicro represents a new digital generation of CW-EPR spectrometers from Bruker. It is a highly integrated digital spectrometer featuring field controller and signal processor to provide researchers with unsurpassed resolution and precision.

Decreased size,

increased performance


With the EMXmicro, Bruker presents a compact Continuous Wave spectrometer (CW-EPR) with a footprint as small as a tower PC and increased EPR performance in magnetic field and signal resolution

The EMXmicro represents a new digital generation of CW-EPR spectrometers: It is a highly integrated digital spectrometer featuring field controller and signal processor with unsurpassed resolution and precision. Being a micro spectrometer, the EMXmicro frees lab space by integrating these devices plus an optional temperature controller in the footprint of a tower PC.

The EMXmicro represents an unparalleled performance-to-footprint ratio. The whole spectrometer electronics including the optional variable temperature unit (ER4141VT) comes in a tower-like console with a footprint as small as a tower PC. While the footprint decreased, the spectroscopic performance has been increased substantially in both magnetic field resolution and signal resolution.


Technical Details

  • 18 bit center field resolution, corresponding to a precision of <60 mG
  • 18 bit signal digitization
  • Up to 128,000 points for sweep axis
  • Full freedom in magnetic field sweep from 100 mG up to the maximum field
  • Independent of conversion time, large and small signals can be detected at once with one gain setting
  • Sequential detection of 1st and 2nd harmonic (or 0° and 90° modulation phase)
  • Sensitivity up to 1200:1 (International Weak-Pitch Protocol)
  • Easy upgrade to multifrequency CW-EPR from L-band to Q-band
  • Range of accessories and dedicated resonators
  • Devoted Instruments




EPR in Chemistry

Metal centers, organic and inorganic radicals involved in chemical processes can be studied by EPR in various branches of chemistry: coordination chemistry, metalloorganic compounds, electrochemistry, redox processes, kinetics involving radical intermediates, photochemistry and catalysis.
EPR in material science

EPR in Material Science and Physics

Within the areas of physics and material science there are many topics of interest. EPR can be employed to investigate polymer synthesis and degradation, paint properties, testing the purity and stability of photovoltaics, semiconductors, batteries as well as carbon nanotubes. Furthermore, information can be gained about the coordination environment of transition metals, rare-earth and actinide ions.
EPR in Life Science

EPR in Life Science

EPR is a powerful tool in the field of life sciences. EPR provides insight into the structure, function and reaction mechanisms of enzymes, membrane proteins, RNA/DNA, and for characterization/screening of DNP agents. Using spin-labeled biomacromolecules enables you to study their structure and dynamics. EPR detects and quantifies reactive oxygen and nitrogen species (ROS/RNS) including nitric oxide.

EPR in Pharma

EPR spectroscopy is a powerful tool in various areas of pharmaceutical analysis: detection and evaluation of degradation, stability and shelf-life, reaction monitoring, sterilization processes and profiling of paramagnetic impurities.
EPR in Industry

EPR in Industry

In industrial settings, a wide variety of properties of products are analyzed by EPR: oxidative stability and antioxidant capacity of foods and beverages, determination of radiation dosage, post-irradiation effects on products, polymer analysis to determine failure rates, and diamond quality.


News & Events



Service & Life Cycle Support for Magnetic Resonance and Preclinical Imaging

Bruker’s commitment to provide customers with unparalleled help throughout the buying cycle, from initial inquiry to evaluation, installation, and the lifetime of the instrument is now characterized by the LabScape service concept.

LabScape Maintenance Agreements, On-Site On-Demand and Enhance Your Lab are designed to offer a new approach to maintenance and service for the modern laboratory