Shunt is a resistor designed to be connected in parallel with a measuring device. By providing a very small voltage drop across its resistance proportional to the current, it could measure current which beyond the measuring devices range. 

DER EE offers high-quality DC AMMETER Shunt by different type such as light weight, with base and without base.  The measuring ranges are from 1A up to 5000A. 
For custom-designed, please feel free to contact us.       

Ammeter shunt

Model : Shunt