1, F level (CreepageandclearanceFailure): the lowest level of prevention of electrical contamination, applicable to medical devices not in direct contact with the patient, such as electrocardiographs, X-ray machines and so on.
2, BF level (BodyFloating): applicable to medical devices in direct contact with patients, such as heart rate monitors, blood pressure monitors.
3, CF + level: for medical devices in direct contact with patients, the level of protection is higher than the BF level, such as respiratory machines, anesthesia machines and so on.