6
PN01805 REV00
Hardware
The RF transmitter is housed in a polycarbonate case that is 3.5 in (88.9 mm) wide x 2.5 in (64.3 mm) deep x 1 in (26.2
mm) high. It can be securely mounted using the provided industrial adhesive or optionally using user-supplied screws,
fasteners or tie-wraps. The digital temperature sensor has a small footprint and is attached to a 6 ft long plenum-rated
cable. The temperature sensor tether cable is attached to the tag’s terminal connector block using a two-wire connection.
The cable is user-removable for installations that require temporary detachment for mounting. RF Code tags and sensors
are designed to ensure clear RF transmissions in high-density deployments, such as within racks and data centers. The RF
transmitter operates with a low duty cycle that translates to long battery life. The R151 temperature tag has an expected
life of a minimum of 5 years
*
.
RF Transmitter Operational Specifications
• RF Transmitter Operational Temperature
: -20° C to +70° C (-4° F to +158° F)
• RF Transmitter Storage Temperature
: -40° C to +80° C (-40° F to +176° F)
• Sampling Rate
: 20 seconds
• Temperature Sensor Tether Cable Operational Temperature
: -55° C to +100° C (-67° F to +212° F)
• Temperature Sensor Accuracy
: +/- 2° F from -10° C to +85° C (14° F to +185° F)
Power Specifications
• Battery Type
: Three (3) Lithium CR2032 replaceable coin cells
• Battery Life
: 5 years*
*
The R151 RF Transmitter can operate over the operational temperature range and withstand periods of time subjected
to the RF transmitter storage temperature limits, however the battery life is optimized at 5 years for normal use in
temperature-controlled environments between 50° F and 130° F. If the RF transmitter is subject to prolonged exposure
or use under extreme temperature conditions, this will decrease the life of the batteries. The R151 Tethered Tempera-
ture Sensor design allows the tag unit to be installed inside less extreme environments while the more durable tempera-
ture sensor tether cable is installed in areas exposed to more extreme temperatures or condensation. The RF transmitter
should be protected from condensing environments; condensation can cause the electrical circuit or mechanical con-
nections to become unreliable. Exposing the RF transmitter directly to liquids may cause the product to malfunction,
or permanently damage the circuitry, and voids the product warranty. Based on the ratings and specifications from the
battery manufacturers, RF Code develops usage models to calculate the life of the active RFID Tags. Like all models,
there are assumptions and approximations involved. The stated values are engineering estimates and not guaranteed
performance. Exposing the RF transmitter to extreme temperatures will shorten the battery life. RF Code warrants all
tags to be free from defects in materials and workmanship for a period of 1 year. Featuring a low-battery alert, the tag
will continue to monitor and report temperature for at least two months following the initial low battery condition.
After that, the tag will continue to broadcast its unique ID and a low battery indication with each beacon, but will not
report temperature until the batteries are replaced.
