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SMARTRAC, RFMicron Release Passive RFID Temperature Sensor Technology

The new sensors enable users to track the temperatures of products or assets via low-cost disposable passive RFID tags and off-the-shelf UHF EPC Gen 2 readers.
By Claire Swedberg

Last week, RFMicron also released its Hermes IoT Smart Edge Development Platform to help developers create a system using devices that capture sensor data and forward it to a cloud-based server. According to Lambrecht, the solution provides the necessary horsepower to perform more critical processing and decisions locally before aggregating data in the cloud. The Hermes platform is an appliance with a Linux processor to process data from sensors and forward that information to the server. It contains a UHF reader module, a Wi-Fi radio, and USB and Ethernet ports. The system is designed for use with RFMicron's sensor tags and chips so that sensor data could be collected from a variety of sources, and then be managed in the cloud.

Within the past 12 months, SMARTRAC released two other passive moisture-sensing UHF RFID inlays—the Sensor Tadpole and Sensor Patch—both made with RFMicron's Magnus S2 Smart Passive Sensor IC. The Tadpole, which won this year's RFID Journal Award for Best New Product (see RFID Journal Announces Winners of Its 10th Annual Awards), is designed for use by the automotive industry to detect the presence of moisture inside a car body after the new vehicle is sprayed with water to ensure quality control. To detect small water quantities across a wider area, the tag can be extended via a paper tail that absorbs water and transfers moisture-level information to the tag via capillary action. The SMARTRAC Sensor Patch, designed for health-care applications, is intended for use with adult diapers for geriatric patients in the health-care industry.

When installed inside a car body, the Sensor Tadpole can be fitted with a water-wicking paper tail, enabling the tag to detect small water quantities across a wider area.
Several automotive companies are incorporating the Sensor Tadpole inlay and Sensor DogBone tag, as well as RFMicron pressure-detecting and moisture-sensing tags, into car seats for pilot projects. The pressure sensors in the seat can determine a passenger's size (for instance, adult versus child), while moisture sensors in the seat back can help to determine whether an object is human or non-human, as well as ascertain the position—leaning forward or sitting back, for example. German vehicle manufacturers, including a producer of high-end cars, are incorporating the Sensor Tadpole inlay into their vehicles for pilots they are conducting (see Solutions for Automotive, Health Care and Retail: Water Leaks in Cars Can't Hide From RFID).

Several businesses in the construction industry are currently piloting RFMicron's moisture-sensing tag for leak-detection applications. In addition, an incontinence-management company is piloting the moisture tag for use in diaper products.

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