The oil content tester is a high-performance, one box design product that has been widely used in the field of seed oil content testing. The product adopts a modular design concept and can be configured according to user needs to meet the practical needs of factories and scientific research. It has been widely applied in many fields such as food, agriculture, petrochemicals, chemical fibers, energy, building materials, etc. It can not only meet the requirements of quality management and monitoring in the production process, but also be used in research and development work in related fields. This product not only has the characteristics of nuclear magnetic resonance without special sample preparation, non-destructive testing, and green environmental protection, but also has excellent measurement accuracy and repeatability, fast analysis speed, simple and convenient operation, making it an ideal cost-effective instrument.

Nuclear magnetic resonance has significant advantages such as non-destructive testing, one machine with multiple parameters, and the same multiple parameters. When designing magnets, the first step is to preliminarily determine the type and structural dimensions of the magnet based on experience, and then use finite element method to calculate and obtain accurate dimensions. The assembled magnet achieves the required uniformity through passive homogenization.

Principle of Nuclear Magnetic Resonance Analysis for Oil Content Tester:

In a static magnetic field, magnetic atomic nuclei have different energy levels. When a sample is irradiated with electromagnetic waves of a specific frequency, when the energy of the electromagnetic waves is equal to the energy level difference, the atomic nuclei absorb the electromagnetic waves and undergo energy level transitions, producing resonance absorption signals. Nuclear magnetic resonance is a physical phenomenon that occurs in atomic nuclei in a static magnetic field under the action of another alternating magnetic field. Not all atomic nuclei can produce this phenomenon. Nuclear magnetic resonance occurs in atomic nuclei because they have nuclear spin. In nuclear magnetic resonance spectra, the process of magnetization returning to equilibrium can be described by spin lattice relaxation time T1 and spin spin relaxation time T2. The difference in relaxation time indicates the variation in nuclear magnetic resonance spectra. NMR signal is a physical phenomenon of emitted electromagnetic radiation, which is proportional to the density of the nucleus. Using NMR signals to reflect the chemical structure, diffusion coefficient of molecules or atoms, reaction rate, chemical changes, and other properties of the sample.