EPR Instruments


Whether for the industrial researcher, quality control, or academic institutions, the microESR allows users to detect the concentration and composition of free radicals with a simple software interface and easy-to-follow workflows.

In the lab

or in the field

Faits marquants

Ideal tool for researchers, quality control, or educators.

The microESR is a small, portable research-grade instrument that weighs only 10 kg and can fit easily on a bench, fume hood, or even be transported into the field. It requires no special installation or regular maintenance meaning even the most inexperienced researcher or student can benefit from the analytical power of EPR.


The spectrometer has a weight of only 10 kg and a 30.5 × 30.5 × 30.5 cm³ footprint
Sweep width of 500 G at X-band operating frequency
The microESR is ideally suited for many different types of applications including analysis of edible and crude oils or food and beverages. It is also ideal for graduate and undergraduate chemistry labs.
General Purpose ESR / Industrial Analysis / Education
Read More



Oil and lubricant analysis

Asphaltenes, a nuisance for oil refineries everywhere. They tend to flocculate unpredictably, clogging the refinery and causing expensive shut-downs. Asphaltenes are solubility class compounds, and contain vanadyl and nickel porphyrins as well as aromatic hydrocarbons that are EPR active. The microESR provides an ideal, portable EPR sensor for detecting these compounds that disrupt the refining process.

Monomer Control in Styrene Production

Polymerization reactions during the industrial processes in which they are synthesized and purified. To avoid this undesired phenomenon, polymerization inhibitors such as (2,2,6,6-tetramethylpiperidin-1-yl) oxidanyl (TEMPO) and its analogues are added to the monomer reaction system.

Beer Freshness (EPR)

Only method to measure how materials, process design and operations can damage or optimize beer freshness throughout the entire beer production cycle.
EPR_Edible oil

Edible Oil Analysis (EPR)

During the past two decades, the food industry has transitioned to the use of natural plant extract-based antioxidants in a variety of food products. The goal is to protect the shelf life of products from free radical oxidation without the use of traditional synthetic food additives.
Crude oil

ESR Analysis of Asphaltene and Vanadium in Crude Oil Can Determine its Quality

Roughly one-third of the world's energy currently comes from crude oil. The quality of oil is determined by its chemical composition, which can affect its processing, performance, and market price. Therefore, qualitative and quantitative oil condition monitoring is essential.


SampleBench Automation

For measuring free radical oxidation and shelf life in food products, Bruker has developed a solution that includes microESR with automation and SampleBench user friendly software. The combined system and SOP provide an easy workflow for measuring oxidation profiles in food samples.

SampleBench Automation

SampleBench Automation for microESR brochure


Nouveautés et événements



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