This "singularity" of tag isolation is absolutely essential to database integrity. Neither false positives nor false negatives should be tolerated in a tracking situation. On the other hand, the ability to achieve batch mode scanning (all tags located in the field of engagement
responding) is also a practical necessity. The Active RFID Systems, Inc. dual mode system enables both of these critical operating parameters to be met. A single tag adjacent to others can be individually selected or an entire warehouse of tags can be selected simultaneously.
ARS products incorporate both RF output and bi-directional infrared operating modes. In addition to cost savings – by using the infrared system the cost of the tag is reduced by 30% - this system is air-transport compatible with RF silence. This means that, although some other systems may meet this requirement, only the Active RFID system enables radio silence while retaining 100% tag utility with 40 kb/sec data transfer via infrared.
The ARS technology also operates on almost any handheld device containing an IrDA port (e.g. PDA, PDT, mobile computer), and a licensed software application runs on the vast majority of these devices, enabling infrared communication to the tags.
The ARS EPC-compliant ID protocol tags operate at 433.92 MHz (optional 868-915 MHz), in FCC-compliant beacon operating mode with read-write capabilities of up to 4MB. Temperature, humidity, shock, and pressure sensing options are available.
Both ARS tags and readers are available in NEMA 4 IP-67 ratings. The readers are network-compatible with 802.11.b, 802.11.. The systems can be networked with Zigbee self-configuring reader all incorporating bi-directional infrared communication. The readers and triggers are compatible with portal operation.
ARS also licenses firmware, software and middleware with Oracle and SAP database integration; software partners include Octave Technology, Asset Pulse and Perfectech.
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