Gold Coin Testing Machine — Conductivity Tester for Coins, Bars & Bullion

It is a portable tester that checks whether a gold coin, bar or biscuit is genuine by measuring its electrical conductivity with eddy currents. You select the metal the piece is sold as, place it on the sensor pad and compare the reading in MS/m with the value that metal should give. Nothing is scratched, filed or dipped in acid, so the piece can still be sold.

Choose the metal the coin is sold as, for example fine gold or 22K gold, place the coin flat in the centre of the sensor pad, read the screen, then turn the coin over and test the other face. If either reading does not match the value for that metal, do not buy the coin until it has been checked further, for example by weight, size and an XRF test.

Tungsten is almost as heavy as gold, so weight and size checks pass it, and acid or a touchstone only tests the gold on the outside. This tester measures electrical conductivity under the surface. Tungsten reads about 18.8 MS/m, which matches neither fine gold (about 45) nor 22K coin gold (about 9.7), so a hidden core moves the reading away from the value for the metal you selected.

Yes. The field passes through capsules, blisters and foil up to about 3 mm, so a sealed coin is tested without opening it and the packaging stays intact.

No. It shows conductivity and whether it matches the metal you chose; it gives no karat number. For the karat or the full alloy of jewellery, use a Signet XRF analyzer. Many shops that buy both bullion and jewellery keep one of each, because XRF reads the surface and conductivity reaches below it.

It reaches about 0.65 mm into each face, so test both sides, and a very thick gold shell can hide a core deeper than that. Pieces under about 1/4 oz or thinner than about 0.8 mm are outside its range, and it is not meant for rings, chains or set jewellery. Check high-value pieces by a second method as well.

Yes, within its size range. It covers gold, silver, platinum and palladium coins and small bars from about 1/4 oz to about 2 oz, depending on the shape and the metal, with a minimum thickness of about 0.8 to 1 mm. Reference values include fine gold at about 45 MS/m, 22K (916) coin gold at about 9.7 and fine silver at about 61.

Bullion dealers checking coins and bars before paying for them, jewellers buying back gold coins and biscuits across the counter, pawnbrokers checking coins and bars before lending against them, coin dealers and collectors testing sealed coins, and vaults spot-checking stored bullion.

The tester, a copper calibration piece, the charger and cable, the instruction manual, a quick guide and a padded carry case. It is a portable, battery-powered unit, so there is no installation: it runs for over 10 hours per charge and charges in about 2 hours.

Book through our sales team on WhatsApp or by phone; there is no online checkout. The booking amount counts toward the full price and the balance is due on delivery, for 1 to 10 units per booking. Delivery is free, with dispatch in about 35 to 45 days.

The Gold Coin Tester is priced at ₹1,35,000, inclusive of GST. You book it through our team with a booking amount of ₹50,000 per unit, which counts toward the full price; the balance of ₹85,000 per unit is due on delivery. Message or call our sales team, or send your requirement through the form on this page.