radio frequency detector

[Adelelee]

is the metal detector a radio frequency detector? how does it work? is the safe for child?

[Marrow]

Ooo now there's an interesting question. To be an RF detector, it would need to measure the induced current (or, similarly, the induced time-varying magnetic field) in a conducting part of the detector (aka antenna), preferably with the size of the antenna matched to the wavelength of the RF field you are trying to detect.

Whereas a metal detector generates its own EM field, and measures the perturbations on that field caused by the presence of conducting (e.g. metallic) objects.

Does that clarify anything for you

[emzit]

Marron, you didn't say if it was safe for children - as a forum about babies and children this is the most important piece of information. Tsk tsk.

[StJuniper]

Still, I think she wins the internet for the day.