User's Manual

Active RFID Tags: Features, Specifications, and Deployment Guidelines
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Figure: An R155/R156 temperature-humidity sensor mounted on the inside of a rack (left side of photo) near an R104-I IT
Asset Tag (right side of photo)
An RF Code best practice is to place temperature sensors at the top and bottom and a temperature-humidity sensor in
the middle of the rack door. While not specifically necessary for RCI metrics, using temperature-humidity tags gains you
visibility to humidity levels as well as to heat in the server racks and rows, which further enhances your ability to monitor
and manage your data center environment.
NOTE: Do not mount tags on hot surfaces, such as directly on a reader or on a server chassis; doing so can cause them to
report inaccurate data.
R151 Tethered Temperature Sensor Tag
As an alternative to using the R150 Temperature Sensor Tag, the R151 form factor can be deployed in environments
where the RF transmitter (tag) module is mounted in open space while the temperature sensor is installed inside RF-
blocking enclosures such as a metal ductwork or refrigerators. Mounting is easy and flexible; the tethered sensor can be
routed into difficult to reach places, such as above a suspended ceiling or inside HVAC air ducts.