Omega Products OMWT-TEMP15 User Manual
Wireless Temperature Transmitter
OMWT-TEMP15
Starts at
$
137
⻬ Transmits Up to
180 m (600')*
⻬ 64-Bit Unique ID
⻬ Up to 100 Sensors
Can Coexist
⻬ Compact ABS Enclosure
⻬ Complies with Part 15
of FCC Rules
⻬ Internal Loop Antenna
The OMWT-TEMP15 wireless
temperature transmitter is a batteryoperated digital temperature sensor
with a microprocess or controlled
418 MHz FCC certified radio transmitter.
The OMWT-TEMP15 has an on-board
time of day clock that allows it to spend
most of the time in a low-power
quiescent state. At pre-determined
time intervals, the clock will wake up
the on-board microprocessor. Unique
serial number information and digital
temperature data are read from a
digital temperature sensor. This
information is combined with a
CRC-16 error check and transmitted
in a very short data packet that
results in a transmitter “on” time of
only 15 milliseconds. This architecture
allows the OMWT-TEMP15 to
consume very little energy, resulting
in a battery life of up to 3 years.
The electronics are coated with a
conformal rubber material that
provides a moisture barrier against
condensation. Submersion in water is
not recommended. A hole in the top
ABS cover permits a special tool to
be inserted to activate the service
switch. The device is shipped with the
transmitter turned off (anytime the
device is to be shipped, the
transmitter should be turned off;
otherwise, it must be placed in a
shielded container to prevent
interference that might cause shipping
problems). The unit is started by
pushing the service switch (the user
feel the button click).
When the service switch is pushed, a
data transmission immediately
OMWT-TEMP15, $137,
shown larger than
actual size.
OMWT-SOFT, $100,
displays real-time
historical chart or
numerical data
occurs, and a special mark is placed
in the ID field of the transmitted data
packet to indicate which device is in
service or installation. The service
switch is also used to put the device
in a quiescent mode (no
transmissions and very low power
consumption). This is the state the
device is in when the user receives it.
Push and hold the service switch for
10 seconds or more to enter this
powered-down state.
With the OMWT Series Windows
software, incoming data being
received from OMWT Series wireless
transmitters can be viewed in a realtime, historical time-based chart or in
a numerical view. High/low alarms
can be set for each transmitter
signal, with either a visual or audible
alarm indication on the PC. Data can
also be logged to disk at a userspecified rate in a text file format that
can be opened into Microsoft Excel.
The OMWT Series Windows
software includes a DDE server that
can interface the data being received
from OMWT Series wireless
transmitters to other Windows
software packages.
Specifications
Transmission Frequency: 418 MHz
Transmission Range*: Up to
180 m (600') depending on
environmental conditions
Transmission Rate:
10 to 17 seconds random
Accuracy: ±0.5°C (±0.9°F)
-10 to 85°C (-18 to 185°F)
Operating Temperature:
-40 to 85°C (-40 to 185°F)
Storage Temperature:
-40 to 85°C (-40 to 185°F)
Humidity: 10 to 90% RH
non-condensing
Battery: 3.6 V lithium battery (included)
Battery Life with Transmissions:
3 years
Shelf Life with Battery Installed:
5 years in quiescent mode
FCC Certified: FCC ID: M5ZCNT
Dimensions:
38 H x 53 W x 15 mm D
(1.5 x 2.1 x 0.6")
Weight: 43 g (1.5 oz)
AVAILABLE FOR FAST DELIVERY!
To Order (Specify Model Number)
Model No. Price Description
OMWT-TEMP15 $137 Wireless temperature transmitter
OMWT-REC232 222 Wireless receiver and 1.8 m (6') RS-232 cable
OMWT-SOFT 100 OMWT Series Windows software
OM-NOMAD-BATT 12 Replacement 3.6 V lithium battery
CS-3774 75 Reference Book: Introduction to Microcontrollers
Comes with complete operator’s manual.
* Depending on environmental conditions.
Ordering Example: OMWT-TEMP15 wireless temperature transmitter, OMWT-REC232
wireless receiver and OMWT-SOFT Windows software, $137 + 222 + 100 = $459.
C-1
with DB9F termination
(WIN95/98/NT/2000/XP)
C
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