Home Internet of Things Aerospace Apparel Energy Defense Health Care Logistics Manufacturing Retail

Access This Premium Content

Options To Access This Article:

What Subscribers Are Saying

  • "Probably the best investment I've ever made."
    Steve Meizlish, President & CEO, MeizCorp Services, Inc.
  • "I have found that RFID Journal provides an objective viewpoint of RFID. It you are looking for a resource that provides insights as to the application and implications of deploying RFID, RFID Journal will meet your needs, It gives you a broad perspective of RFID, beyond the retail supply chain."
    Mike O'Shea, Director of Corporate AutoID/RFID Strategies & Technologies, Kimberly-Clark Corp.
  • "No other source provides the consistent value-added insight that Mark Robert and his staff do. In a world dominated by press release after press release, RFID Journal is developing as the one place to go to make the most sense out of the present and future of RFID in commerce."
    Bob Hurley, Project Leader for RFID, Bayer HealthCare's Consumer Care Division
  • "RFID Journal is the one go-to source for information on the latest in RFID technology."
    Bruce Keim, Director, Hewlett-Packard
  • "RFID Journal is the only source I need to keep up to the minute with the happenings in the RFID world."
    Blair Hawley, VP of Supply Chain, Remington Products Company

Passive UHF RFID Sensor Tags Go Where No Sensors Have Gone Before

Now it's easy and economical for companies to monitor the condition of their assets, products, buildings and machinery in any environment.
By Bob Violino
Dec 16, 2015

Want to know the temperature of machine parts before they overheat and cause damage? Monitor water-intolerant assets without opening the container to check each one? Detect strain in concrete? Save water while increasing plant growth in greenhouses and crops in fields? Automate the time-consuming process of tracking tire pressure on aircraft?

Passive ultrahigh-frequency RFID sensor tags, introduced in the past few years, enable companies to monitor these and other conditions, because they are not hampered by the limitations of wired or battery-operated sensors. Wired sensors can be bulky and difficult to install and access. They require a power source and can't be used in remote environments. Active wireless sensors have batteries that must be changed on a regular basis, which can drive up costs and interrupt processes.

To help make the International Space Station's Urine Processor Assembly more efficient, Phase IV Engineering designed a system to capture temperatures from a spinning drum. (Photo: NASA)
When manufacturing electric motors, for example, companies need to monitor the temperature of motor rotors to ensure they don't overheat and shut down.

Embedding wired temperature sensors in rotors is not an option, because it would prevent the rotor from rotating, says Mikel Choperena, product development manager at Farsens, which offers a variety of passive UHF RFID sensor tags. If a company uses active sensor tags to monitor rotors, he says, it must stop all production whenever a battery is low to take the sensor out and perform a battery change.

UHF RFID sensor tags, such as those by Farsens and RTEC, come in a variety of form factors. (Photos: Farsens and RTEC)
Passive on-metal temperature tags, on the other hand, can be attached or soldered onto the motor rotor. RTEC's sensor tags, for example, can be as small as 5.5 millimeters (0.2 inch), says Drex Lee, marketing and sales executive for the company.

Smartrac's Sensor Tadpole, equipped with RFMicron's Magnus S2 integrated circuit, comes in 21.5 by 73.0 by 2.5 millimeters (0.8 by 2.9 by 0.1 inches) and its wet inlay format is easy to implement and works on difficult surfaces, such as metal parts in car chassis, says Christian Achenbach, a Smartrac spokesperson. "The size is thin and small, which is tailored to the demand of car manufacturers or other industries, where moisture detection is an essential part of quality control," he says. "The tag detects small amounts of water leakage inside vehicle compartments that can damage a car's electronics bays, cabins and trunks. Window seals, weather stripping and body seams are the primary causes of factory water leakage."

To continue reading this article, please log in or choose a purchase option.

Option 1: Become a Premium Member.

One-year subscription, unlimited access to Premium Content: $189

Gain access to all of our premium content and receive 10% off RFID Reports and RFID Events!

Option 2: Purchase access to this specific article.

This article contains 1,674 words and 5 pages. Purchase Price: $19.99

Upgrade now, and you'll get immediate access to:

  • Case Studies

    Our in-dept case-study articles show you, step by step, how early adopters assessed the business case for an application, piloted it and rolled out the technology.

    Free Sample: How Cognizant Cut Costs by Deploying RFID to Track IT Assets

  • Best Practices

    The best way to avoid pitfalls is to know what best practices early adopters have already established. Our best practices have helped hundreds of companies do just that.

  • How-To Articles

    Don’t waste time trying to figure out how to RFID-enable a forklift, or deciding whether to use fixed or mobile readers. Our how-to articles provide practical advice and reliable answers to many implementation questions.

  • Features

    These informative articles focus on adoption issues, standards and other important trends in the RFID industry.

    Free Sample: Europe Is Rolling Out RFID

  • Magazine Articles

    All RFID Journal Premium Subscribers receive our bimonthly RFID Journal print magazine at no extra cost, and also have access to the complete online archive of magazine articles from past years.

Become a member today!

RFID Journal LIVE! RFID in Health Care LIVE! LatAm LIVE! Brasil LIVE! Europe RFID Connect Virtual Events RFID Journal Awards Webinars Presentations
© Copyright 2002-2016 RFID Journal LLC.
Powered By: Haycco