NOTE THAT THIS ADD ON WILL REQUIRE YOU TO RETURN YOUR EXISTING BASE UNIT TO THE FACTORY IN CHICO, CA. YOU WILL BE RESPONSIBLE TO GET IT TO THE FACTORY. THE COST TO RETURN IT TO YOU WILL BE CALCULATED IN YOUR FINAL PURCHASE PRICE.
When to use it: It is best to use the large or small bridge on the main unit when possible.
Conditions where you cannot use the bridge sensors and should use the External Bridge are
1. Pure gold, pure silver, or silver alloy bars that at least 50 mm (about 2 inches) wide and
12.5 mm (about ½ inch) thick. Potential uses include 100 oz silver bars and most gold
good deliver bars.
2. Cases in which you are concerned about possible thick cladding on these larger bars,
or drilled out areas where other metals are inserted; therefore a thru measurement of
the sample resistivity is needed. Also, the External Bridge's ability to get an electronic
density measure of the bar is needed to augment the resistivity measurement.