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Sentry
Liquid Level Alarm
2.2 LOW Liquid Level Alarm
LOW LEVEL alarm condition occurs when the liquid level falls
below the middle of the pins of the probe. An example of falling
water level causing an alarm condition is a cistern that requires
filling.
2.3
Optional Relay Output
The relay output may be utilized to switch on remote alarms,input
to security systems, auto dialers, WiFi transmitters or control
applications. See FIG 5 and FIG 6. Set the relay operation to
Normally Open or Normally Closed shown in FIG 6
3. INSTALLATION
3.1 Mount Indoor Alarm Display
Mount the Sentry indoor alarm display at a convenient viewing
location. Select an eye level location that is frequented, near a
120VAC receptacle. Power to the receptacle should be supplied
from a circuit separate from any pump that is being monitored
by this alarm. Install two supplied screws, 3" apart vertically and
projecting ¼" from the wall, to mount the display. Install the AC
adapter and plug into the alarm display. The LED will be steady
yellow with a continuous audio (after 9 minutes), indicating no
wireless communication. The supplied labels may be used to
identify the indoor alarm display's function, ie HIGH LEVEL in the
SUMP. Radio transmission is improved by mounting away from
sheet metal or electrical wiring. Clear line of sight is the best situation.
3.1.1
3.2 Mount the Outdoor Transmitter
Mount the Sentry outdoor transmitter near the water source to
be monitored. Fasten the weatherproof NEMA 6P enclosure to
a post or a riser pipe above grade using screws supplied. Radio
transmission is improved by mounting the transmitter higher off
Page 4
Installer Code and/or Radio Frequency
If an installation requires multiple alarms, or if interference
with other radio devices occurs, change the installer
code and / or the frequency program. See section 4.3.
Model 110 Operating Manual
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