Can RFID Determine a Train’s Location?

What types of tags are used to track railcars and alert passengers how long it will be before a train arrives? —Karuna ——— Dear Karuna, Systems that determine the locations of trains can utilize either or active (battery-powered) or passive tags. Hamburger Hochbahn,...
Digital In-Store Ad Network Works With RFID

Digital In-Store Ad Network Works With RFID

Three California businesses will test the Novitaz Digital Ad Network, using battery-powered 433 MHz RFID loyalty cards to identify customers and provide promotional text messages offering discounts.

Is There a UHF Tag Available That Works in Water?

I’ve heard that Impinj developed such a tag, but I can not find any information about it. —Robert ——— Impinj developed a near-field communication (NFC) tag that it says can be read through water. Like a high-frequency (HF) tag—which features a coil so the tag...

How Should My Company Tag Trolleys?

Our goal is to ensure that we can read every tag 100 percent of the time on both incoming and outgoing trolleys moving through a dock door. Which approach would you recommend: installing additional fixed readers or putting more tags on the trolleys? —Name withheld ———...