I have a vertical sensor like yours and the one that was recently on Ebay.  
However, no matter how I try I can not balance it so the pointer stays in the 
center of the indicator on the front of the unit.  The best I have been able 
to manage is with the pointer near the top of the dial, but it does work 
there.  Any ideas or suggestions would be appreciated.
Thanks
Jim Allen
I have a vertical sensor like yours and the one that was recently on Ebay.  However, no matter how I try I can not balance it so the pointer stays in the center of the indicator on the front of the unit.  The best I have been able to manage is with the pointer near the top of the dial, but it does work there.  Any ideas or suggestions would be appreciated.

Thanks

Jim Allen