If so, which companies offer them?
Yes, there are. Many cars now come with sensors to measure air pressure in tires. These sensors are integrated with an RFID device that can communicate wirelessly (see Michelin Uses RFID to Track Tire Pressure and Tread for London Bus Company and Crane Aerospace and Electronics’ RFID-Based Tire Pressure Sensor Simplifies Aircraft Maintenance).
There are also active RFID pressure sensors for measuring air pressure within a closed area. RF Code, for example, offers the R160 Air Pressure Sensor, designed specifically for use in data centers. The sensor tags gather environmental data and transmit it via radio frequency communication to fixed and mobile readers every 10 seconds. The readers decode the data and make it available via a standard TCP-IP connection (either wired or Wi-Fi) to the company’s Sensor Manager software, which runs on a server within the data center. The software then aggregates the collected information and correlates it to the asset’s location, and can issue alerts if action needs to be taken. The software can also analyze the environmental information and issue various reports and graphs (see RFID Energy-Management Systems for Data Centers).
In addition, Farsens offers the Vortex1, an ultrahigh-frequency (UHF) RFID sensor tag designed to monitor pressure in sealed places without the need for batteries or wires. The tag is suitable for pressure-sensitive asset- and process-management applications, and can be used for retrofitting piping systems, as well as for tracking gas or liquid containers (see Farsens Unveils UHF RFID tag with Battery-Free Pressure Sensor).
—Mark Roberti, Founder and Editor, RFID Journal
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