The use of conventional nuclear magnetic resonance is limited by

the fact that the object needs to be carried to the NMR equipment

and needs to fit inside large superconducting magnets. Both

limitations are removed by single-sided NMR probes based on open

magnets specially adapted to the object under study. These can be

inexpensive and portable sensors that give access to a large

number of applications inaccessible with using conventional magnet

geometries. Substantial improvements in the magnet design,

detection electronics, and the...