EPR Instruments


The Bruker EMXplus provides premium performance for EPR research. It features several 2D operation modes where the second axis can be time, temperature, goniometer angle or microwave power.

Embodying a new EPR philosophy

Premium performance for routine research


Magnetic field sweep from 100 mG up to 1.7 T.
Simultaneous detection of first and second harmonic or 0˚/ 90˚ modulation phase.
Large and small signals can be detected with one gain setting
EMXmicro & EMXplus Supreme Resolution and Sensitivity for EPR Spectroscopy
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EMXplus Features

  • 24 bit center field resolution, corresponding to a precision better than 1 mG
  • 24 bit signal digitization
  • Up to 256,000 points for field and time sweeps
  • Sensitivity up to 2000:1 (International Weak-Pitch Protocol) with PremiumX
  • Easy upgrade to multifrequency CW-EPR from L-band to Q-band
  • CW-ENDOR available in this spectrometer class
  • 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.



X-band sensitivity 1.6 x 109
Weak pitch signal-to-noise ratio 2000 : 1
Modulation frequency 4 to 100 kHz in 1 kHz steps
Modulation amplitude up to 20 G
Field stability 10 mG / hour
Sweep resolution 256 000
Amplitude resolution 24 bit
Time constant 0.01 ms - 1 s
Simultaneous detection 0° / 90° modulation phase
  1st / 2nd harmonic
  dual inputs
Triggering internal / external
Option up to 90 dB microwave attenuation


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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