Liquid helium has a boiling point of approximately 4 Kelvin, the lowest of all gases. This makes it the coldest liquid known and therefore an optimal coolant for producing extremely low temperatures. Liquid helium is predominantly used to cool superconducting magnets, for example in magnetic resonance imaging (MRI), nuclear magnetic resonance spectroscopy (NMR) and various research applications, including particle accelerators

Helium is used as a super coolant for cryogenic applications such as Magnet Resonance Imaging (MRI), Nuclear Magnetic Resonance (NMR) spectroscopy, particle accelerators, Large Hadron Collider, Superconducting Quantum Interference Device (SQUID), Electron Spin Resonance Spectroscopy (ESR), Superconducting Magnetic Energy Storage (SMES), magnetohydrodynamic superconducting generators, power transmission, magnetic levitation transport, superconducting sensors, mass spectrometers, superconducting magnets, strong-field magnetic separator, toroidal field superconducting magnets for fusion reactors and other cryogenic research.