The sensors are mounted on two ten-foot sections of steel TV antenna mast, available in the U.S. from stores such as Radio Shack. Approximately four feet are buried in the ground, and the rest of the mast is vertical at the gable end of our single-story house. The mast is attached with a TV mast bracket at the roof line of the house. About six feet of mast projects above the roof line. The sensors came supplied with clamps and hardware to attach them to the mast.
All excess cable is coiled up and attached securely under the eave.
Cables going into the junction box were left drooping slightly, to encourage rain to drip off instead of flowing into the junction box. The 100-foot cables run through the attic and out through a hole at the peak of the eave. The hole was later filled with caulking to discourage squirrels and other pests from getting in. From the attic, I drilled a hole in the top plate of an interior wall and snaked the cables down to the basement. The cables connect to the back of the WRL-25 display unit.