There is a great guy named Russ on YouTube. He just built his very own magnetic pole and strength tester, and it's pretty awesome!!!
Russ' comments:
Quotemagnetic pole and strength tester, built from scratch for testing Rodin coils and other stuff. RWG42985
ENJOY ~Russ
http://www.ringsbyruss.com/youtube/Russ_Gries%27s_32_LED_Bar_Magnetic_PoleStrength_Detector.bmp (http://www.ringsbyruss.com/youtube/Russ_Gries%27s_32_LED_Bar_Magnetic_PoleStrength_Detector.bmp)
The clip:
http://www.youtube.com/watch?v=Bjwi2KqXKb0 (http://www.youtube.com/watch?v=Bjwi2KqXKb0)
Thank you Russ, you did a great job!
MileHigh