Contrinex: HF-RFID Tags for Use at High Temperatures

Articles | By Contrinex Sensor | 15 January 2015
Contrinex high temperature RFID tag Contrinex high temperature RFID tag Photo: Contrinex

In the highly automated automotive industry, the track & trace functions of intelligent identification systems play an important role. High operating temperatures are often a major challenge.

RFID systems are typically used in automated manufacturing processes where different product versions are manufactured and conveyed along the same production line. These processes include paintshop lines and metallurgical powder sintering in automotive manufacturing.

Traceability and Quality Assurance

Specifically for such high temperature applications, Contrinex has developed a high-frequency RFID system that is currently among the most powerful on the market. The system includes non-embeddable tags for applications at very high temperatures of 250 °C (482 °F) and other tags, for temperatures up to 180 °C (356 °F), which are embeddable even in metal. Unlike fixed code carriers, RFID tags store the entire individual product history. This facilitates traceability and quality assurance, even in very difficult environments. The tag accompanies the product throughout the manufacturing process and stores individual data, including customer requirements, directly on the object. As a result, each object can be uniquely identified at any stage of production, eliminating all confusion. This allows for highly automated processes and more customized production with smaller batches and central data storage. Since data transfer is wireless and requires no visual contact, operation is possible even when objects or tags are heavily soiled

Durable and Resistant to Thermal Shocks

Modern manufacturing processes place great demands on the materials and systems used. In particular, RFID tags in fully-automatic automotive paint shops are exposed to a variety of rinsing, coating and burning operations, including electrophoresis. They must be resistant to various detergents, temperatures up to 250 °C (482 °F) and safely withstand rapid changes in temperature. Contrinex therefore chose Nelco N7000-1 polyimide laminate and prepreg (pre-impregnated carbon fiber) for the transponder inlay material and selected Vectra® LCP C115 with 15% glass fiber reinforcement for the housing. Inside the inlay is a small chip, just a few millimeters in size, contained within a metal- sealed, nitrogen-filled ceramic shell and connected to the printed coil antenna. To match the frequency (13.56 MHz), the coil antenna must have a certain number of turns, which also defines the diameter of the RFID tag. Normal diameters are 20, 30 and 50 mm (0.79”, 1.18” and 1.97”).

Last modified on Thursday, 15 January 2015 09:57
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