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EMS Debuts Passive UHF Tag, Reader
Escort Memory Systems designed its first ultra-high frequency RFID system specifically for harsh, high-temp industrial environments.
Aug 18, 2004—Escort Memory Systems (EMS), a company known for providing high-frequency RFID systems used in industrial applications, this week introduced its first ultra-high-frequency (UHF) tag and interrogator. The company says it developed the UHF reader and passive tag, which are designed for high-heat, high-shock environments, to provide an increased read range over its HF and other RFID systems.
The UHF-UN1 interrogator can read and encode tags compliant with EPC standards, making it compatible for use as part of an open-loop supply chain. Still, EMS marketing manager Bradley Todd says the new tag and reader were designed specifically for industrial uses, such as identifying parts moving through a paint and assembly process in the automotive factory, which tend to be closed-loop applications.
When the UHF525HT is attached to an object with brackets—which come with the tag and set it 1 inch from an object's surface—it can be read from as far away as 4 feet with the UHF-UN1 interrogator. As with any passive RFID tag, however, the presence of metal can affect that range. Other EMS tags have read ranges from a few millimeters to several feet, depending on the frequency at which they operate.
The UHF525HT is compliant with the ISO 18000-6B standard, holds 256 bytes of data and weighs 3 ounces. It measures roughly 5 inches wide, 2 inches tall and a half-inch thick. Todd claims this is the first high-temperature tag on the market that complies with ISO 18000-6B.
This Ethernet cable is the only wiring leading to or from the interrogator, making it well suited for industrial applications. "This is really nice if you're a factory integrator installing this reader," says Todd, "because every time you introduce new wiring into an industrial environment, you also introduce added cost. Plus, there are [fewer] components that can fail." The UHF525HT tag and UHF-UN1 interrogator are both available now; pricing information has not been released.
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