Hello Tinobrewer,

The general use of metal detectors is not prohibited, unless it is used in a protected area for archeological and historical reasons, when the use of such items will be considered illegal.

In order to set up a tour operator business , you will need to have the required licenses and you may even be required to have a permission to use the metal detectors ( You can find this out by enquiring directly at the town hall or phoning them ) . I am unsure about the legalities of using the metal detector use as a touristic lure to attract clients into your business, so again I am afraid that you will need to make the relevant enquiries at the town hall.

If you find that the language barrier is a problem I advice you to contact a gestoria in Valencia or Barcelona that can make the relevant enquiries in your behalf as well as file the corresponding application forms.

Best Regards,