China's MultiDimension Technology has launched a new range of magnetic pattern recognition sensors designed for use in validating banknotes.

The range make use of a technology known as tunneling magnetoresistance (TMR) and is claimed to be the first commercial products to use TMR in banknote validation, banknote counting and sorting and magnetic card readers.

The science underpinning the sensors are the changes in electrical resistance that occur when small magnetic changes are applied to a mix of magnetic and non-magnetic materials. In the case of TMR, two ferromagnetic layers separated by a very thin layer of insulating material are used to detect quantum changes in magnetic properties of materials.

"MDT's new TMR magnetic sensors are the first products using TMR technology on the financial anti-counterfeit appliances market, and they bring many unique benefits of TMR technology to our customers with high-sensitivity and high-resolution magnetic signal detection," said Dr. Song Xue, MDT's chief executive.

To read the complete article, see:'Quantum' sensor validates banknotes(www.securingindustry.com/security-documents-and-it/-quantum-sensor-validates-banknotes/s110/a1830/)