The Presidium Gold Karat Tester is a handy desktop device and developed using an electrochemical effect to estimate the purity of gold alloys in the unit of Karat, from 8K to 24K. The precision is enhanced by the dispenser pen that can be activated with a simple push-button, allowing the optimum amount of testing liquid to be dispensed safetly in a uniform and accurate quantity, to achieve consistent results. It identifies the karat of both yellow and white gold (8K, 10K, 12K, 14K, 18K, 20K, 22K, and 24K) and platinum. This gold karat tester also indicates if material is non-gold metal. It shows quick results on LED display and has a clean and safe dispenser pen.