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176.3
(6.94)
36.6
(1.44)
127.0
(5.0)
228.6
(9.0)
101.6
(4.0)
19.0 (0.75)
25.4 (1.0)
141.2
(5.56)
2.0 (
3
⁄4) NPT
(w/1
1
⁄4 NPT)
OR
2.0 (M20 x 1.5
(w/1
1
⁄2 BSPT)
1
1
⁄4 NPT
DRIVEN SHIELD
PROBE
RF capacitance
point LeveL SenSoRS
LV800 Series
driven shield is activated with the
U Superior 0.5 pF
Sensitivity Ensures
Reliability
U Build-Up Immunity Helps
Eliminate False Signals
U High Intensity LED
Indicating Light
(Ordinary Location
Integral Sensors Only)
U Simple 2-Step Manual
Calibration
LV800 Series RF capacitance
sensors offer cost-effective point
level monitoring with reliability you
can count on. Omega
®
provides you
with the most affordable solution
for your application. Omega’s RF
capacitance probes are designed
to provide a high level of sensitivity,
stability and durability for powder
and bulk solids applications, as well
as liquid and slurry applications.
Principal of Operation
A radio frequency is applied to the
probe and is continually analyzed
to determine the influence caused
by the surrounding environment.
As material contacts the probe, the
radio frequency shifts indicating
an increase in capacitance (C).
The active probe of the unit and the
vessel’s wall make up the 2 plates,
(A) of a capacitor which are
separated by a fixed distance (D).
The probe’s insulator and
surrounding air provide the
dielectric material [with dielectric
constant (K)]. As the air (K=1.0) is
displaced with any other material
(K > 1.0), the capacitance effect (C)
is enhanced, thereby changing the
application’s impedance. This
influence is measured within the
circuitry and compared to a reference established by the sensitivity
setting. The setting determines how
much influence must be present
before the output changes. The
driven shield section
enables the circuitry to ignore product build-up on the probe that would
otherwise cause false sensing. The
of the probe
same radio frequency potential as
the sensing probe. Since current can
not flow between identical potentials,
the driven shield blocks current flow
from the active probe to the vessel
wall through the material build-up,
thereby eliminating the sensing of the
material build-up.
176.3
(6.94)
19.0 (0.75)
25.4 (1.0)
406.4
(16.0)
141.2
(5.56)
3
⁄4) NPT
2.0 (
1
⁄4 NPT)
(w/1
OR
36.6
(1.44)
82.6
(3.25)
279.4
(11.0)
2.0 (M20 x 1.5
1
(w/1
⁄2 BSPT)
1
⁄4 NPT
1
DRIVEN SHIELD
PROBE
3.0 (0.12) HOLE
(FOR EXT)
LV801 Dimensions: mm (inch)
LV802 Dimensions: mm (inch)
SENSITIVITY SETTING OF THE LV800
SENSITIVITY
DESCRIPTION
HIGH
MED
LOW
NO. OF
ADJ. TURNS
0 to 1
1 to 3
> 3.0
MATERIAL
DIELECTRICS
1.5 to 3.0
3.0 to 9.0
> 9.0
K-41
LV801, shown smaller than actual size.
TYPICAL
APPLICATIONS
PLASTICS, SOAP, OILS
RUBBER, CEMENT
GRAINS, FERTILIZERS,
FEED, SALT
WASTEWATER, SLURRIES
ANY WATER BASED
SOLUTIONS
Page 2
Applications
LV800 Series capacitance point level sensors
are versatile devices providing high and low
level readings in bins, silos, tanks, hoppers, and
other vessels. LV800 Series superior sensitivity
range allows users to properly adjust units to
meet the needs of a wide variety of applications.
Whether your application is for a powder, liquid,
granular solid, or viscous material, the LV800
Typical Applications include, but not limited to
Chemicals Plastics Pellets
Feed/Grain Rubber Pharmaceuticals
Liquids Wastewater Sand
Food Ingredients Slurries Cement
Powders Paint and Coatings Coal
Granular Solids Oils Paper Pulp
Series product line offers the right solution.
Specifications for LV800 Series
Power 115 Vac (±15%), 2.5 VA, 50/60 Hz, 230 Vac (±15%), 2.5 VA, 50/60 Hz
Altitude 2000 m (6562') max
Installation Category II
Pollution Degree 4 (reduced to 2 by enclosure) suitable for indoor/outdoor use
Ambient Operating Temperature -40°C (-40°F) to 65°C (150°F)
Internal Bin Temperature* To 80°C (176°F ) with aluminum mount [<40°C (104°F) ambient]
To 204°C (400°F) with stainless steel mount [<50°C (122°F) ambient]
Output Relay SPDT, 5A @ 250 Vac, 30 Vdc maximum
External Indicators Red and green LEDs indicating power and operating mode (ordinary location units only)
Sensitivity Multi-turn potentiometer adjustment 0.5 pf to 150 pf
Stability ±0.027 pf per °C (±0.015 pf per °F) @ 0.5 pf setting
Time Delay 0.25 to 15 sec delay-to-activate, adjustable 0.25 sec delay-to-deactivate, fixed
Fail-Safe Switch selectable - HI/LO
Build-Up Immunity Protected via driven shield to 150 Ω load
Enclosure Cast aluminum screw-on cover, beige polyester powder coat, NEMA 4 (IP66)
Conduit Connection Two (2) ³⁄₄ NPT connections
Approvals CSA(US) CSA(C) ordinary locations, CE mark (ordinary location only)
* Influenced by mounting, material thermal conductivity and ambient temperature.
Probe Specifications
Standard/Food Grade Probe
Mounting 1¹⁄₄ NPT aluminum
Probe Material 9.5 mm (³⁄₈") dia. 316 SS probe and guard, PPS and nylon insulators
Probe Length 406 mm (16") from aluminum mounting
Temperature (Probe Only) PPS: 232°C (450°F) max, nylon: 148°C (300°F) max
Pressure 3.5 bar (50 psi) max (aluminum connection), 10 bar (150 psi) max (³⁄₄ NPT SS)
Stub Probe
Mounting 1¹⁄₄ NPT aluminum
Probe Material 9.5 mm (³⁄₈") dia. 316 SS probe and guard, PPS
Probe Length 228.6 mm (9")
Temperature (Probe Only) PPS 232°C (450°F) max
Pressure 3.5 bar (50 psi) max (aluminum connection)
To Order Visit omega.com/lv800 for Pricing and Details
Model No. Probe Type Power Probe Connection
LV801 40 cm (16") PPS 115 Vac 1¹⁄₄ NPT Al
LV802 23 cm (9") PPS 115 Vac 1¹⁄₄ NPT Al
LV803 40 cm (16") PPS 230 Vac 1¹⁄₄ NPT Al
LV804 40 cm (16") food grade nylon 115 Vac 1¹⁄₄ NPT Al
LV805 40 cm (16") PPS 115 Vac 1¹⁄₄ and ³⁄₄ NPT stainless steel
Comes complete with operator’s manual.
Ordering Examples: LV801, 40 cm (16") PPS probe, 115 Vac, 1
LV804, 40 cm (16") food grade nylon probe, 115 Vac, 1
1
⁄4 NPT Al connection.
1
⁄4 NPT Al connection.
K-42
K
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