Hazards associated with electromagnetic fields are:
exposure to magnetic fields, which can cause biological effects, although the nature of such effects is subject to debate, as research is at a comparatively early stage
interference with cardiac pacemakers, which can lead to their malfunction
use of cryogenic liquids to cool large magnets — often there is an outer jacket of liquid nitrogen and an inner coolant of liquid helium.
Persons at Risk
The following are at risk from electromagnetic equipment in the laboratory.
All laboratory staff.
Cleaners.
Visitors.
Risk Rating
The risks are as follows, as given under guidance in BS 8800.