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2741 Single Sensor
Temperature Monitor and Alarm
with Factory Pre-sets
 The 2741 Single Sensor
Temperature Monitor
and Alarm offers the most powerful
set of capabilities available in a single-channel temperature monitor and
alarm system and it does so at a low price. It combines warning and alarm
temperature limits with digital temperature display as well as visual and
audible annunciation.
Separate high- and low-temperature limits are provided for warning as well
as alarm conditions, i.e. four total. In addition, a separate audio
annunciation time delay is provided for each temperature limit. Limits and
delays are dictated by the user and pre-set at time of shipment. There are
four user-changeable limits and delays.
Constant temperature monitoring
While constantly monitoring sensor
temperature, the 2741 displays the current temperature in either
Fahrenheit or Celsius (centigrade). When any of the four temperature
limits is exceeded, the display begins flashing and the appropriate
predefined time-delay begins.
At the end of the delay, the audio
annunciator is activated once every 30 seconds for a warning condition and
once every 5 seconds for an alarm condition. When an alarm or warning
condition ceases to exist, the flashing display, the audio annunciation
and the delay timer are automatically reset to normal for that condition.
A rugged reset touch-switch is provided to permit the user to temporarily
cancel the audio annunciation and restart the appropriate time-delay.
An output is provided to activate a telephone auto-dialer whenever a
warning or alarm condition exists, but only after the auto-dialer
time-delay has elapsed. It is also activated during a power failure. An
auto-dialer is ideal for use at remote sites or infrequently accessed
locations, as well as during non-working hours when no one would be nearby
to hear the audio annunciator.
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 Utilizes Dallas
Semiconductor's digital temperature sensor.
Sensor unit can be up
to 300 feet from monitor.
Temperature range:
minus-67 F. to 257 F.
One-degree accuracy
from minus-40 C. to 85 C.
Two-degree accuracy
from minus-55 C. to minus-40 C. and from 85 C. to 125 C.
Four user-specified
factory pre-set temperature limits for high/low warning/alarm limits.
Five user-specified
factory pre-set time delays for high/low warning/alarm and auto-dialer.
Non-volatile memory
for programmed settings.
Output for optional
telephone auto-dialer.
Mounts in standard
duplex indoor/outdoor electrical receptacle.
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