Page 1
ConduCtivity LeveL SwitCheS
LVCR-441-12 shown
smaller than actual size.
LVCR units with removable
LVCF/LVCR/LVCP
Series
rods are available with varied
rod lengths for custom
applications. Consult Flow
Engineering for details.
Rods can also be shortened
in the field.
LVCN-201 relay
shown smaller
than actual size.
U Easy to Install and Operate
U Rugged Construction
U Low Cost
U Removable Rods
U Up to 5 Points of
Level Control
U Rods Can be
ECTFE/ETFE Coated
U Available with 316 SS
TM
Tri-Grip
Sanitary, Flange,
or Threaded Connections
Models
U LVCF (1-5) Fixed Rods
U LVCR (1-5)
Removable Rods
U LVCP (1-5) Pendular
Electrodes
U CLE-P Pendular Electrode
Without the Housing
U LVCN-200 Series
Controllers
OMEGA’s conductivity level
switches offer a wide range of customized options to meet any application’s needs. They are designed
to control the level of all conductive
mediums, offering up to 5 different points of level control. Models
are available with fixed rigid rods,
with removable rigid rods, or with
pendular electrodes attached to the
housing with cables.
These switches suit applications
involving both alarm point detection
and on/off pump valve control.
Installation is easy and operation is
maintenance-free.
The probes work through the
variation of the electrical resistance
between the reference electrode
and the level-control electrode.
Conductivity level switches detect
the level resistance when their
electrodes are covered by
the medium.
An electrically conductive tank wall
can be used as the reference
electrode. If the tank is made of
plastic, concrete, or any other nonconductive material, an additional
electrode is required as a reference.
The LVCF switches can
accommodate up to five 316 SS
fixed rods for 5 different levels of
control. The rods are isolated with
a TFE bushing and can be coated
with ECTFE/ETFE when the probe
is used with aggressive or sticky
media that cause buildup. The user
can easily modify operating levels in
the tank by cutting the length of the
electrodes. The LVCF switches are
rugged and compact and have no
moving parts. This makes them
reliable for controlling conductive
media as well as for high-pressure
applications. LVCF models are
compatible with LVCN-200 Series
controllers only.
K-X
The LVCR models offer the same
features as the LVCF, plus
removable 316 SS threaded rods
that make it possible to switch the
rods. Rods can be ordered
separately in longer length and
can then be custom cut. Removable
rods make the system more
versatile, easier to handle, and
more forgiving if the rod’s length is
cut incorrectly. LVCR models are
compatible with LVCN-200 Series
controllers only.
Along with the same features as the
rigid rod probes, LVCP pendular
probes can accommodate up to
5 model CLE-P electrodes. The
LVCP probes are ideal for deep
measurements in wells or large
tanks where long rods would be
impractical, but they work equally
well for shorter-length applications.
The electrodes are suspended from
PVC cables that allow for longer
lengths, as well as for different
applications and installations.
LVCP models are compatible with
LVCN-200 controllers.
The electrode model CLE-P is the
simplest version of all conductivity
probes. A small polypropylene
Page 2
LVCR Mounting Diagram
1 Level
Minimum and
maxium level
enclosure houses a 316 SS rod that
is attached to a PVC cable. This
option eliminates the need for a
process connection.
LVCN-200 Series conductive liquid
on/off level controllers are used to
power all level probes. The
LVCN-200 models are electronically
controlled devices that open and
close an electrical contact to effect
the operation of other devices in the
same, or another, electrical circuit.
The LVCN-201/202 models can
control the differential of minimum
and maximum level, with an
adjustment for sensitivity. The relay
has 1 reverse SPDT contact.
The LVCN-203/204 models control
2 independent levels and 2 reverse
SPDT contacts. They also include a
sensitivity adjustment.
The LVCN-200 Series is designed
so that multiple units can be used in
combination to provide a variety of
control functions, including multiple
alarms and on/off control for
alternating pumps. Both models are
available with DIN rail sockets or
with screws.
Minimum and maxium level
using an electrode as reference
LVCP, shown
smaller than
actual size.
LVCP switches
are available
with varying
cable lengths
to monitor and
control different
fluid levels.
Cables may also
be shortened by
the user. Consult
Flow Engineering
for details.
LVCP Head
LVCP Probes
K
SPECIFICATIONS
(LVCF/LVCR/LVCP)
Electrical Connection: Cable gland
with ½ NPT conduit
Electrodes: Available in configurations
from 1 to 5 electrodes
Fixed Rod Length: 100 mm to 2 m
(3.9" to 6.5')
Pendular Cable Length: 500 mm
(19.7") to 20 m (65.6')
Enclosure: Glass filled nylon or die
cast aluminum; NEMA 4 (IP65)
Operating Ambient:
-10 to 120°C (14 to 248°F);
20 bar (290 psi) maximum
COMMON SPECIFICATIONS
(LVCN-200)
Power: 24 Vdc ±10%, 115 or 230 Vac
(50/60 Hz)
Sensitivity: 0.5 to 50 kΩ;
potentiometer adjust
Operating Ambient: -10 to 60°C
(14 to 140°F)
Enclosure: ABS; DIN rail mount or
screw attachment; IP40 protection
K-X
SPECIFICATIONS
(LVCN-201/202)
Application: Minimum and
maximum level control
Current: 2 VA maximum
Output: SPDT relay,
5 A @ 250 Vac
Time Delay: 0.1 to 5 sec,
adjustable
SPECIFICATIONS
(LVCN-203/204)
Application: Control of
2 different levels
Current: 3 VA maximum
Output: Dual SPDT relays,
5 A @ 250 Vac
Time Delay: 1 sec, fixed
Page 3
44.5
111.1
82.6
(3.25)
82.6
(3.25)
111.1
82.6
(3.25)
88.9
(3.5)
6.35
(0.25)
63.5
(2.5)
LVCF Nylon Head
88.9
(3.5)
63.5
(2.5)
*
LVCP
22.3
(0.875)
LVCF-4
6.35
(0.25)
*Aluminum Head is 108 mm (41⁄4")
Dimensions: mm (inch) ø = diameter
Application Point level of conductive liquids in tanks and pipes
Process ¹⁄₂ to 1¹⁄₂
Connection NPT or BSP NPT or BSP NPT or BSP NPT or BSP 2" sanitary
1¹⁄₂" sanitary 1¹⁄₂" sanitary 1¹⁄₂" sanitary 2" sanitary or flange
or flange or flange or flange or flange
Electrical Cable entry or ¹⁄₂ NPT conduit entry
Electrode 1 fixed rod 2 fixed rods 3 fixed rods 4 fixed rods 5 fixed rods
1 removable rod 2 removable rods 3 removable rods 4 removable rods 5 removable rods
1 pendular 2 pendular 3 pendular 4 pendular 5 pendular
by cable by cable by cable by cable by cable
Length (L) Rod: 100 mm to 2 m (3.9" to 6.56')
Cable: 500 mm to 20 m (19.7" to 65.6')
Enclosure Glass-filled nylon or aluminum die cast
Material
Temperature -10 to 120°C (14 to 248°F)
Max Pressure 290 psi (20 bar)
Class
Protection NEMA 4 (IP65)
133.4
(5.25)
3
⁄4 to 1¹⁄₂ 1 to 1¹⁄₂ 1¹⁄₂
LVCR-2
Inside Head of 3
Rod Controller
Inside Head of 5
Rod Controller
LVCN-201, 202
Front
View
Side View
82.6
(3.25)
LVCN-203, 204
111.1
44.5
(4.375)
(1.75)
Application Control of Min Control of 2 Different
and Maximum Level for Levels for Conductive
Conductive Level Probes Level Probes
Operating 24 Vdc (±10%) or 24 Vdc (±10%) or
Voltage 115 or 230 Vac (50/60 Hz) 115 or 230 Vac (50/60 Hz)
Current Consumption 2 VA 3 VA
Sensitivity Adjustment 0.5 to 50 kΩ (potentiometer) 0.5 to 50 kΩ (potentiometer)
Output 5 A maximum, 250 Vac relay (SPDT) 5 A maximum, 250 Vac relay (2-SPDT)
Time Delay 0.1 to 5 seconds 1 second
Operating Temperature -10 to 60°C (14 to 140°F) -10 to 60°C (14 to 140°F)
Enclosure Material ABS ABS
Mounting DIN rail or screws DIN rail or screws
Class Protection IP40 IP40
LVCN-200
Series
K-X
Page 4
To Order
Model No. Description
LVCF-111-12-ETFE Fixed rod conductivity level switch; one 12" rod, ¹⁄₂ NPT process connection, nylon enclosure,
LVCF-231-24-ETFE Fixed rod conductivity level switch; two 24" rods, 1 NPT process connection, nylon enclosure,
LVCR-231-60 Removable rod conductivity level switch; two 60" rods, 1 NPT process connection, nylon enclosure
LVCR-341-72 Removable rod conductivity level switch; three 72" rods, 1¹⁄₂ NPT process connection,
LVCP-121-96 Pendular rod conductivity level switch; one electrode, 96" cable, ³⁄₄ NPT process connection,
LVCP-231-96 Pendular rod conductivity level switch; two electrodes, 96" cables, 1 NPT process connection,
LVCP-341-96 Pendular rod conductivity level switch; three electrodes, 96" cables, 1¹⁄₂ NPT process connection,
Switch Sensors
Model No. Description
LVCF-(A)(B)(C)-(D) Custom fixed rod conductivity level switch; select number of rods (A), process connection (B),
LVCR-(A)(B)(C)-(D) Custom removable rod conductivity level switch; Select number of rods (A), process connection (B),
LVCP-(A)(B)(C)-(D) Custom pendular conductivity level switch; Select number of electrodes (A), process connection (B),
Ordering Options
Order Suffix Description
A-Rods/Electrodes
1 1 rod/electrode; single point detection
2 2 rods/electrodes; minimum/maximum detection
3 3 rods/electrodes; 3-point detection
4 4 rods/electrodes; 4-point detection
5 5 rods/electrodes; 5-point detection
B-Process Connection
1 ¹⁄₂ NPT thread (LVCF-1, LVCR-1, LVCP-1 only)
2 ³⁄₄ NPT thread (LVCF/LVCR/LVCP-1 or 2 only)
3 1 NPT thread (LVCF/LVCR/LVCP-1, 2 or 3 only)
4 1¹⁄₂ NPT thread (LVCF/LVCR/LVCP-1, 2, 3 or 4 only)
5
6 2" flange, ANSI, 316 SS (all models)
7
C-Enclosure
1 Glass filled nylon with ¹⁄₂ NPT conduit with cable gland
2 Aluminum die cast with ¹⁄₂ NPT conduit entry
3 Aluminum die cast with cable gland entry
D-Rod Length/Cable Length
Specify Fixed rod length (inch) for LVCF
Specify Removable rod length (in) for LVCR
Specify Cable length (inch) for LVCP
ETFE Coating
-ETFE ECTFE/ETFE coating for LVCF or LVCR rod sensors
Controllers
Model No. Description
LVCN-201 Min/max level controller, 24 Vdc power
LVCN-202 Min/max level controller, 115 Vac power
LVCN-202-230VAC Level controller for 2 independent levels, 230 Vac power
LVCN-203
LVCN-204
LVCN-204-230VAC
Comes complete with operator’s manual.
Ordering Examples: LVCF-111-12-ETFE, 1 fixed rod, LVCN-202, controller, 70A-1, alarm.
LVCP-231-96, 2 pendular electrode switch, LVCN-204, controller, 70A-1, alarm,
Minimum/maximum level controller, 230 Vac power
ECTFE/ETFE coating
ECTFE/ETFE coating
nylon enclosure
nylon enclosure
nylon enclosur
nylon enclosure
enclosure (C) and rod length in inches (D)
enclosure (C), and rod length in inches (D)
enclosure (C), and cable length in inches (D)
1.5" Tri-GripTM, sanitary (LVCF/LVCR-1, 2 or 3 only)
2" Tri-GripTM, sanitary (LVCF/LVCR-1, 2, 3 or 4 only)
Level controller for 2 independent levels, 24 Vdc power
Level controller for 2 independent levels, 115 Vac power
K-X
LVCR-441-12,
shown smaller
than actual size.
Accessories
Model No. Description
70A-1 Continuous tone alarm
TX4-100 30.5 m (100') spool of
4-conductor wire
PSU-93
LVCR-(**) Replacement rods for
LVCR Series
ECLE-P Electrode
**
Unregulated power supply
Specify rod length (in inches): 12, 24, 36, 60.
K
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