Nuclear Range in NMR

The Larmor equation gives different base frequencies for the various nuclei based on their gyromagnetic ratio and the applied magnetic field. For a typical high-field magnet, the nuclei can be detected at the following frequencies:

Instruments are typically described as their 1H frequency, as in a 400MHz instrument seen in the image above. The other nuclei for that instrument can be seen using probes adjusted to the frequencies in the image.