CIQTEK is the manufacturer and global supplier of high-value scientific instruments, such as Scanning Electron Microscopes (SEMs), Electron Paramagnetic Resonance (Electron Spin Resonance) Spectroscopy, Scanning NV Probe Microscope, Gas Adsorption Analyzer, etc.
Benchtop EPR Spectroscopy Best Price for sale
Benchtop EPR Spectroscopy Best Price for sale
Benchtop EPR Spectroscopy Best Price for sale

Benchtop EPR Spectroscopy | EPR200M

The CIQTEK EPR200M is an X-band benchtop electron paramagnetic resonance/electron spin resonance (EPR or ESR) spectroscopy.

Based on its high sensitivity and stability, EPR200M offers an economical, low-maintenance, and user-friendly experience for EPR study and analysis.

  • # Reliable & Stable
    Superior sensitivity, accuracy, and stability. Lower cost of ownership and best price.
  • # Easy-to-Use
    Integrated control software and data processing software.
  • # Portable
    Highly integrated, lightweight, and compact for desktop use.
  • # Easy Tuning
    Support manual and automatic tuning.
  • # Accurate Quantification
    Optional built-in standards for accurate g-value/g-factor and quantitative EPR measurements.
  • # Diverse Accessories
    Liquid nitrogen variable temperature with cryostat, 4 mm outer diameter sample tube, Goniometer, Light system, Electrolytic cell, Flat cell, etc
  • Integrated System Design

    The design integrates the optimized microwave, magnetic field, probe, and central control module, making the EPR machine easier to transport, space-saving, and adaptable to a broader range of test environments.

  • Superior Magnetic Field System

    Sweeping ranges: -100 to 6500 Gauss, with over-zero field scanning possible.

    Magnetic field: air-cooled and compact.

    Magnetic field scanning control tech: uniformity of better than 50 mG in the sample area, guaranteeing high-quality spectra.

  • State-of-the-art Microwave Technology

    Ultra-low noise microwave generation technology, combined with high-quality microwave probes and weak signal detection, guarantees the high sensitivity of the EPR spectrometer.

  • Professional EPR Spectra Analysis Service

    Experienced technical and application engineers provide professional services to help customers master the EPR analysis and attribution of EPR spectra, even for beginners.

  • EPR in Chemicals
    EPR in Chemicals
    Study of structures of coordination compounds, catalytic reactions, free radicals detection, reactive oxygen species (ROS) detection, chemical kinetics (reaction kinetics), and small-molecule drugs.
  • EPR in Environmental Science
    EPR in Environmental Science
    Environmental monitoring includes air pollution(PM2.5), advanced oxidation wastewater treatment, transition metals heavy metals, environmentally persistent free radicals, etc.
  • EPR in Materials Science
    EPR in Materials Science
    Single-crystal defects, magnetic material properties, semiconductor conduction electrons, solar cell materials, polymer properties, fiber optic defects, catalytic material detection, etc.
  • #
    EPR in Biomedical
    Research about antioxidant characterization, metalloenzyme spin labeling, reactive oxygen species (ROS) and enzyme activity characterization, occupational disease protection, nuclear radiation emergency medical rescue diagnosis classification, cancer radiotherapy irradiation, etc.
  • EPR in Food Science
    EPR in Food Science
    Irradiation dose of agricultural products, beer flavor shelf life, edible oil rancidity detection, alanine dosimeter, antioxidant properties of food and beverage, etc.
  • EPR in Industrial
    EPR in Industrial
    Coating aging research, cosmetic free radical protection factor, diamond trap identification, tobacco filter efficacy, petrochemical free radical quality control, etc.


EPR Application Cases


EPR Applications EPR Detection of Free Radicals

EPR Detection of Free Radicals

Free radicals are atoms or groups with unpaired electrons that are formed when a compound molecule is subjected to external conditions such as light or heat and the covalent bonds are split. For more stable free radicals, EPR can detect them directly and quickly. For short-lived free radicals, they can be detected by spin trapping. For example, hydroxyl radicals, superoxide radicals, single-linear oxygen light radicals, and other radicals produced by photocatalytic processes.

EPR Applications Paramagnetic Metal lons

Paramagnetic Metal lons

For transition metal ions (including iron, palladium, and platinum group ions with unfilled 3d, 4d, and 5d shell respectively) and rare earth metal ions (with unfilled 4f shell), these paramagnetic metal ions can be detected by EPR spectrometer due to the presence of the single electrons in their atomic orbitals, thus obtaining the valence and structure information. In the case of transition metal ions, there are usually multiple valence states and spin states with high and low spins. Parallel modes in a two-mode cavity allow detection of the integer spin regime.

EPR Applications Conduction Electrons in Metal

Conduction Electrons in Metal

The EPR line shape that conducts electrons is related to the size of the conductor, which is of great significance in the field of lithium-ion batteries. EPR can non-invasively probe the interior of the battery to study the deposition process of lithium in a close-to-real situation, from which the microscopic size of metallic lithium deposits can be inferred.

EPR Applications Material Doping And Defects

Material Doping And Defects

Metallofullerenes, as new nanomagnetic materials, have significant application value in magnetic resonance imaging, single-molecule magnets, spin quantum information, and other fields. Through EPR technology, the electron spin distribution in metallofullerenes can be obtained, providing an in-depth understanding of the ultrafine interaction between spin and the magnetic nucleus of metals. It can detect changes in spin and magnetism of metallofullerenes in different environments. (Nanoscale 2018, 10, 3291)


EPR Applications Photocatalysis


Semiconductor photocatalytic materials have become a hot research topic due to their potential applications in environmental, energy, selective organic transformation, medical, and other fields. EPR technology can detect active species generated on the surface of photocatalysts, such as e-, h+, •OH, O2, 1O2, SO3, etc. It can detect and quantify vacancies or defects in photocatalytic materials, assist in studying active sites and reaction mechanisms of photocatalytic materials, optimize parameters for subsequent photocatalytic application processes, detect active species and their proportions during photocatalysis, and provide direct evidence for system reaction mechanisms. The figure shows the EPR spectra of 0.3-NCCN and CN, indicating that 0.3-NCCN contains more unpaired electrons, higher crystallinity, and an extended p-conjugated system, resulting in better photocatalytic performance. (International Journal of Hydrogen Energy, 2022, 47: 11841-11852)

  • CIQTEK EPR-Liquid Nitrogen Variable Temperature System

    Liquid Nitrogen Variable Temperature System

  • CIQTEK EPR-Liquid Nitrogen Dewar

    Liquid Nitrogen Dewar

  • CIQTEK EPR-Light System

    Light System

  • CIQTEK EPR-Sample Standard

    Sample Standard

  • CIQTEK EPR-Flat Cell

    4 mm OD Sample Tube, Flat Cell

  • CIQTEK EPR-Goniometer





Validation of EPR Measurements


EPR Spectra Analysis: Parallel magnetic field signal of a diamond
Parallel magnetic field signal of a diamond
  EPR Spectra Analysis: Signal of TEMPOL after deaeration
Signal of TEMPOL after deaeration


Validation of EPR Measurements: Various free radical signals
Various free radical signals
  Validation of EPR Measurements: Cu valence
Cu valence




EPR Software: EPR-Pro


CIQTEK self-developed EPR-Pro is based on the Windows system, with a rich variety of experimental types, compatible with various experimental modes such as continuous wave, pulse, and two-dimensional experiments, it can achieve automated tuning, angle control, temperature control, etc., and generate experimental reports with one click. The data processing software can be used offline, with rich data processing functions, including quantitative EPR analysis.


EPR Software: EPR-ProEPR Software: EPR-Pro


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Please feel free to contact us for more details, request a quote or book an online demo! We will reply you as soon as we can.