Frequently Asked Questions | Goldanalytix
Here you find answers to the most frequently asked questions on all topics related to precious metal testing. The questions and answers are neatly arranged according to key topics - so you can find what you are looking for very quickly.
When measuring with the BarScreenSensor, it is important to remove the packaging of the object and apply the ultrasound gel to the measuring head. The measuring head must be in direct contact with the test piece.
It is also necessary to scan the entire ingot. It is possible that foreign metal inclusions can only be found at certain points within the object. In addition, the ingot should be physically measured beforehand so that the measured ultrasonic value can be compared with the real thickness.
Furthermore, it is important to pay attention to the size/thickness of the object. If it is too thin, the BarScreenSensor could give wrong results. Therefore, please use the BarScreenSensor only for bars of 50 grams or more. In addition, you should use at least one other measuring method (e.g. digital caliper and precision scale).
The smaller the bar to be tested, the more embossing and stamps in the gold/silver have an effect on the measurement result.
No, we recommend the BarScreenSensor only from a weight of 100 grams and coins do not normally reach this value. If the test objects are too thin, the path length of the ultrasound is not long enough to perform a sufficiently precise measurement.
The GoldScreenSensor which can test smaller objects like coins and bars up to 100 grams, is an excellent addition to the BarScreenSensor.
No. For ultrasound measurement with the BarScreenSensor, the measuring head combined with an ultrasound gel (included in the delivery) must be in direct contact with the smooth surface of the object.
To measure through thin packaging and blisters, devices such as the GoldScreenSensor are more suitable.