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Micro Controller Flow Meter for Rate & Total Flow
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The DPF140 Series of flow
meters are micro controller based
indicators with transmission and
pulse outputs. These units are
designed to compute and display
flow rate and total. The DPF143
has one scaled pulse output and
the DPF144 has two. In addition
to the scaled pulse output, both
models provide an alternative
pulse pass-through output with
galvanic isolation. The DPF143 is
powered by an external DC power
source. The DPF144 is a “twowire”
or “loop powered” device,
meaning that it is powered by the
4 to 20 mA loop circuit itself.
Pulse and 4 to 20 mA analog
outputs can be used to signal
external devices, e.g. certain
metering pumps and water
treatment controls. Alternatively,
one or more pulse outputs can
be configured as alarm outputs.
These flow meters can be
password protected to prevent
resetting the total or changing
configuration settings.
The DPF140 Series meters are
available in wall or panel mount
configurations. Wall mounted
versions can be converted from
wall to meter mount with an
adaptor plate. Check with Omega
for compatible meters. Order
the DPF144 only if a 4 to 20 mA
output signal is a requirement,
otherwise the DPF143 offers the
most flexibility.
Specifications
Display: Rate 5-digit auto-ranging,
total 8-digit
Units:
Rate Units: Gallons/second/
minute/hour/day, liter/second/
minute/hour/day, cubic feet/second/
minute/hour/day, cubic meters/
second/minute/hour/day,
miner’s inch, mega liters/day,
million gallons/day, fluid oz/
second/minute/hour/day,
barrels (42 gallon)/second/minute/
hour/day
Total Units: Gallon, gallon x 1000,
liters, mega liter, cubic meter, acre
feet, cubic feet, cubic feet x 1000,
million gallon, miner’s inch day, acre
inch, fluid ounce, barrels (42 gallon)
Outputs
Pulse Output 1 (All Models): Scaled
pulse output, high alarm output or low
alarm output (opto-isolated)
Type: Current sinking
Maximum Voltage: 45 Vdc
(100 mA)
Maximum Frequency: 6.5 Hz
Pulse Width: 100 ms
Isolation: 300V
Pulse Output 2:
Dpf143:
Type: Current sinking
Maximum Voltage: 45 Vdc
(100 mA)
Maximum Frequency: 2000 Hz
pulse width same as sensor input
Isolation: 300V
Configurable as Alarm: No
DPF144:
Type: Current sinking
Maximum Voltage: 45 Vdc (10 mA)
Maximum Frequency: 6.5 Hz
Pulse Width: 100 ms
Isolation: 300V
Configurable as Alarm: Yes
(high or low)
Loop Power Output: DPF144 only
Set P Range: 0.1 to 99999.9
units/pulse
Input: 5V pulse or contact closure
Input Range: 0.752 to 2000 Hz
K-Factor Range: 0.001 to 999999.999
Flow Alarm Output Range:
0.1 to 99999.9
Operating Temperature: 0 to 55°C
(-32 to 131°F)
Non-Operating Temperature:
-40 to 75°C (-40 to 158°F)
Environmental: NEMA 4X (IP67)
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† All dollar amounts on this site are shown in US currency.
Note: Comes complete with operator’s manual.
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