ECONOMICAL LIQUID LEVEL
FM
APPROVED
TRANSMITTERS
Suitable for Levels to Six Feet
LVR20/30 Series
$
650
⻬
Rugged SS Construction
⻬
4-20 mA or
Resistance Output
⻬
Immune to Changes of
Density and Dielectric
1
⻬
⁄4" Resolution
The OMEGA®LVR20 and LVR30
Series continuous liquid level
sensors operate on a basic voltage
divider network principle. As the
float rises, a magnet in the float
closes a series of reed switches in
sequence which varies the
tapped-off portion of the voltage
divider resistor network. The LVR20
has the basic voltage divider
output—the regulated DC voltage
input equals the maximum voltage
output. The LVR20 has a nominal
1,200 resistance; thus, with a
10 Vdc supply, 8.3 mA of current
are required.
The OMEGA
panel meters can be used to power
and display the resistance from the
LVR20; when relays are required,
the DP25E-A meter can be used.
For maximum accuracy, the readout
device for the LVR20 should be
zero and span adjusted after wiring
is completed to compensate for any
effects due to the resistance of the
lead wires. The LVR20 can also be
made intrinsically safe when used
with OMEGA’s intrinsic safety
barriers and when properly
powered. The LVR30 Series is
provided with a signal conditioner to
provide a 4-20 mA output when
powered by 10-30 Vdc. The
LVR30 Series cannot be made
intrinsically safe.
All LVR30 units are supplied with a
J-box with screw terminal
®
DPF52 or DP24-E
connections. All LVR20 units are
supplied without a J-box with
24 inches of bare wire coming out of
the top of the unit with a 1⁄2 MNPT
conduit connection. All LVR20 and
LVR30 Series units can be wired for
increasing output with either
increasing or decreasing height of
liquid; standard output is increasing
output with increasing height. For
other lengths, adaptor systems are
available. They consist of two parts:
the LVR-C coupling (2 x2FNPT)
and an LVR-A pipe nipple
(2 x2MNPT) of various lengths to
change the insertion depth of the
LVR20 or LVR30 sensor. When
using the adaptors, a zero offset is
introduced into the output signal
which must be compensated for in
the readout device (for example, the
mA signal will not go down to 4 mA,
nor will the voltage output go down
to zero).
Retaining clip pliers are required to
remove the float when using the
adaptor system.
SPECIFICATIONS
Wetted Parts: 304 SS stem and
mounting, 316 SS float, 18-8 SS
float stop
Liquid Temperature: -40 to 110°C
(-40 to 230°F)
Minimum Liquid Specific Gravity:
0.75
Ambient Operating Temperature:
LVR20: -40 to 110°C (-40 to 230°F);
LVR30: -15 to 71.1°C (5 to 160°F)
LVR30 Temperature Coefficient:
±0.00388%FS/°F
Storage Temperature:
LVR20: -40 to 110°C (-40 to 230°F);
LVR30: -40 to 100°C (-40 to 212°F)
Max Operating Pressure: 300 psig
Operating Voltage: LVR30: 10 to
40 Vdc; LVR20: 5 to 30 Vdc
LVR30 Loop Impedance: (Volts in - 10)
x 46.66 = Ω with 24 Vdc power, max
loop impedance = 653 Ω.
Connections: LVR30 is 2-wire; LVR20
is 3-wire
Accuracy: LVR30: 0.4% of full scale or
1
±
⁄2", whichever is greater. LVR20: ±1⁄2"
Weights: LVR30–5 lbs. +
LVR20–1
LVR-C–1
3
⁄4 lbs. + 1⁄4 lb. per foot;
1
⁄4 lbs.
1
⁄4 lb. per foot;
LVR20 Supplied
Without J-box
LVR30 Series
Shown Smaller
Than Actual Size
Indicating
Lengths from
1 to 6 Feet
K-15
DIMENSIONS FOR LVR20 AND LVR30
69.9
(2-3/4)
52.4 (2-1/16)
DIA. TYP
2 MNPT
C
Indicating
Length
Lowest
Level
Indicated
D
A
B
E
8 (5/16)
13 (1/2)
1/2 FNPT
J-Bo
x
Supplied
with LV R3 0
only
Highest
Level
Indicated
A: Float travel = indicating length +3⁄8" ±1⁄4"
B: Stem length = indicating length + 39⁄16" ±1⁄16"
C: Distance to float stop = 6.4 mm (1⁄4") ±1⁄16"
D: 39.7 mm (19⁄16")
E: 44.5 mm (13⁄4") (Assumes 1.0 S.G. Fluid)
Dimensions:
mm (in)
Use the LVR20 and LVR30
transmitters with the DPF50
Series indicators. See
section M for details.
Dimensions: mm (in)
150 lb 304 SS Coupling,
2 x 2 FNPT
Model No. Price
LVR-C $40
LVR-A Pipe Nipples
LVR-C Coupling
Pipe Nipples, 304 SS, 150 lb fittings, 2 x 2 MNPT
Model No. Price Weight (lbs) Indicating Length Change
LVR-A4 12 11⁄4 4"
LVR-A5 20 11⁄2 5"
LVR-A6 19 13⁄4 6"
LVR-A7 30 2 7"
LVR-A9 32 21⁄2 9"
LVR-A11 37 3 11"
LVR-A13 43 31⁄2 13"
MOST POPULAR MODELS HIGHLIGHTED!
To Order (Specify Model No.)
Voltage Divider
Isolated 4-20mA Output Voltage in = Voltage out
Model No. Price Model No. Price Indicating Length
LVR31 $775 LVR21 $650 1'
LVR32 925 LVR22 800 2'
LVR33 1100 LVR23 950 3'
LVR34 1250 LVR24 1100 4'
LVR35 1400 LVR25 1250 5'
LVR36 1550 LVR26 1400 6'
Ordering Examples: LVR31, 316 SS level sensor with mounted J-box and 0.3 m (1')
indicating length, $775.
LVR22 is a 304 SS level sensor with 2 ft long indicating length, nominal 0-1200 ohm
resistance change and a 2" MNPT mounting thread, $608.
K-16
K
FLOW
One Omega Drive | Stamford, CT 06907 | 1-888-TC-OMEGA (1-888-826-6342) | info@omega.com
EPG05
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