Ohaus MCT-500 Digital Scale For Weighing Gold, Gem Stones & Precious Metals. This is a new Ohaus digital scale. Made by the leading Swiss scale manufacturer for Ohaus. The diamond MCT-500 carat balance offers fast, precision weighing with the features you need and much more at a never before seen value. It has Push button digital calibration, tare, memory functions & more. Contoured contemporary design. Scoop & calibration weight included 3 door draft shield provides easy access. RS232 interface. It weighs carats, grains, pennyweights, troy ounces and grams. It measures approximately 8 1/2" x 12" x 13 1/2" (215 x 304 x 342 mm).