THREE-WIRE ULTRASONIC
LEVEL TRANSMITTER
LVU-301
$
950
All Models
⻬ 8° Beam Allows
Application in Restricted
Environments
⻬ All Plastic Construction
⻬ LED Digital Display
Indicates Level in Inches
or Centimeters
⻬ Pushbutton Calibration
For All User Set Points
⻬ Built-In 10A Relay May
Be Configured For Alarm
or Automatic Fill/Empty
Operations
⻬ Fail-Safe Relay Logic
Provides Echo and Power
Loss Safety
APPLICATION
The three-wire ultrasonic level
transmitter is the compact solution
for non-contact continuous level
measurement in process vessels,
storage tanks and open channels.
The transmitter also features a
built-in 10A relay which can be
configured as an alarm on a single
set point or latched on two different
set points for automatic fill or empty
operations. Industrial and municipal
liquid examples include sodium
hydroxide, wastewater, resin, wax,
liquor and bleach.
An ultrasonic sound wave is pulsed
eight times per second from the
base of the transducer. The sound
wave reflects against the process
medium below and returns to the
transducer. The microprocessor
based electronics measure the time
of flight between the sound
generation and receipt, and
translates this figure into the
distance between the transmitter
and process medium below.
APPLICATION VARIABLES
Variable Yes No
oam ⻬
F
onductive ⻬
C
Non-conductive ⻬
∆ Conductivity ⻬
ontact ⻬
C
on-contact ⻬
N
Clean ⻬
Dirty ⻬
Liquid
Non-coating ⻬
apors ⻬
V
∆ Gas Density ⻬
Vacuum ⻬
Ambient pressure ⻬
Low Pressure ⻬
edium pressure ⻬
M
SPECIFICATIONS
Range: 0.2 to 7.5 m (0.5 to 24.5')
Accuracy: ±0.25% of span
Resolution: 3 mm (0.125")
Frequency: 50 kHz
Pulse Rate: 8 pulses/second
Blocking Distance: 15.2 cm (6")
minimum
Display Type: 4 segment LED
Display Units: Inch/cm
Supply Voltage: 14 to 36 Vdc
Consumption: 200 mA
Current Flow: Source/sink
Signal Output: 4 to 20 mA,
12 to 36 Vdc
Signal Averaging: Fast/slow
Calibration: Pushbutton
Relay Current: 10 A
Relay Output: 250 Vac, 10A,
1/2 hp, SPDT
To Order (Specify Model Number)
Model No. Price Description
LVU-303 $950 Ultrasonic three-wire transmitter, sourcing (4 to 20 mA)
LVU-301 950 Ultrasonic three-wire transmitter, sinking (4 to 20 mA)
Accessories
Model No. Price Description
LVCN-51 $345 Continuous relay controller with LED display
Comes complete with operator’s manual.
The sourcing transmitter provides internal 4 to 20 mA excitation and should be used
with a sinking device. The transmitter with sinking output requires external excitation
or should be used with a sourcing device, such as the LVCN-51 continuous relay controller.
Ordering Example: LVU-303, ultrasonic, three-wire transmitter, sourcing (4 to 20 mA),
CE approved, $950.
Recommended Reference Book: Introduction to Design for Civil Engineers,
CE-1917, $29. Visit omega.com/bobi for Additional Books
K-16
LVU-303, $950,
shown smaller
than actual size.
Relay Indication: ON/OFF status
Fail-Safe Diagnostic:
Relay reverts to safe position
Temperature Rating:
-40 to 60°C (-40 to 140°F)
Temp. Compensation:
Automatic over entire range
Pressure Rating: 30 psi @ 25°C,
derated @1.667 psi per °C above 25°C
Enclosure Rating: NEMA 4X (IP65)
Enclosure Material: Polypropylene
Transducer Material: PVDF
Mounting Threads: 2 NPT
Dimensions: 71 D x 159 mm H
(2.8 x 6.3")
AVAILABLE FOR FAST DELIVERY!
K
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