Here is my lightning detector...
We used 3/4" inch galvanised steel bar, fixed 3ft length of 1 and 1/2"
white PVC piping, and the black outer housing is 4" duct pipe with a sealed top.
The Boltek is attached to the white PVC, the duct pipe provides shelter.
The lead just about reaches the PC in the shed... phew!!! :-[