| anti-theft devices |
ranging from some tens of Hz to a few GHz depending on the type of system |
| induction hobs and hotplates |
20 to 50 kHz |
| electric engines and badge readers |
about 100 kHz |
| |
|
| Radio transmitters operated in the long wave range |
30 kHz to 300 kHz |
| Welding devices |
up to a few 100 kHz |
| Induction heaters |
some tens of Hz to some tens of kHz |
| Electrosurgery systems |
some hundred kHz |
| clinical MRI devices use intermediate frequency fields in addition to static and radio frequency fields |
up to 10 kHz |
