The most accurate, low-cost tester available, backed by dependable service and built by Tri-Electronics, the inventor of electronic gold testers. Measures white, yellow, pink and green gold in a full range of values from 6 to 18 karat. No dangerous chemicals or mixing of fluids, so it ecologically safe. Measures 12x 9x 1 3/4 UL listed. Three year warranty. Also operates using two 9 volt batteries (not included). 110 Volt

Tri-Electronics Gold Tester 6-18K (GT-3000)