I have taken mine (from Alaska) to Hawaii, Arizona, Washington and Montana and Illinois on all kinds of big and small planes. I put the control box and coils in a well padded cooler type lunchbox that just fits them and into my carry on, then the rods go in baggage. Since they won't insure or be responsible for electronics and you can't secure your bags I don't see how they can keep you from carrying them on.
I figure if they lose or destroy the rods in baggage I can always find a good stick and keep going, plus they would be covered under lost and damaged baggage. I have had the coils swabbed for explosives, but never a second glance as far as taking them on board. I keep batteries in the control box so I can demonstrate that it is indeed a metal detector in case the need ever arises. I think it is the rods that will trip you up if anything, even though they are no different from a walking cane they look more like they could be some kind of weapon.
I use the well padded lunchbox and wrap the control box in bubble plastic, too, juuusssttt in case I ever have to do an emergency stuffing into my baggage. I also have my name and number engraved outside AND somewhere inside of all my equipment. One for the honest person who might return it, and one for the dishonest person who might leave a big scrape mark on the outside where my name used to be. Also, photograph everything (with serial numbers, too!) and keep stuff like that on a flash drive in your pocket and at home (or on dropbox for access from anywhere) in case a claim or ID ever has to be made. You can password protect the thumb drive files for more security.
Oh, and you probably don't want to try to bring a pinpointer as carry on. They just look too suspicious, especially the more "gun shaped" and poorly labeled "White's Bullseye"! TSA guys are sometimes a little twitchy.