Originally Posted by darryl gesner
You can hold them loosely in your hand or drill out a 1 inch dowel and put the short end in there. Make sure there's no coating on the hanger, you want bare wire. Where I used to work our shop guy used welding rods with a PVC pipe handle but I don't recall exactly how the rod was mounted in the handle. I think he bend the bottom into a loop like an eye to keep it in the handle. We used them for locating underground storage tanks and piping and buried utilities.
darryl, dowsing rods can be made from anything, even pvc pipe.
one of my buddies calls them my voo-doo sticks.
i have one of the pollardwater sticks and keep a pair of brass rods in the trencher trailer, a pair on the excavator and a pair in the truck. these get a lot of use.
in a pinch i have used a couple of scrap 3/4 or 1 inch pvc 90's to dowse with, they'll work.
here is some interesting reading;