CSM_61F-GP-N2_DS_E_1_3
1
Conductive Level Controller
61F-GP-N2
Automatic Water Supply and Drainage
Control
• Ideal for level control of any conductive liquid.
• Compact plug-in controller for single- or two-point control of
conductive liquid level.
• 24/110/120/220/230/240 VAC operation possible.
• Easy installation on DIN rail.
• Low voltage (AC) electrodes.
• Full surge protection.
2
2
220 VAC 220 VAC
Ordering Information
When placing your order, be sure to specify the desired operating voltage.
■Accessories (Order Separately)
Selection Guide for Electrode Holders and Separators
Electrode Holders
Electrode Separators
Compact plug-in conductive level controller 61F-GP-N2
Example: 61F-GP-N2 120 VAC
Rated supply voltage
Applications For city water and other
general-use elec-
trodes. Easy-to-replace
separate versions facili-
tate maintenance of
electrodes.
When mounting space is
limited. Special 3-pole
holder of small size and
light weight. Ideal for soft
drink vendors, etc., where
only limited space is avail-
able.
For low specific liquids. Used for sewage,
sea water, etc., having a low specific resis-
tance. In sewage use, electrode holders
must be installed 10 to 20 cm apart from
one another. For acids, alkalis and sea wa-
ter, electrode holders may be as much as
1 meter apart to operate properly.
When resistance to high
pressure is required. Ide-
al for use in tanks where
temperature or pressure
inside the tank is high,
e.g. 250°C
Mounting style Flange Screw Flange Screw
Insulator material Phenol resin Phenol resin Ceramics Fluorine Resin
Max. temperature 70°C (without water drips
or vapour on the surface of
the electrode holder)
150°C (without water drips or vapour on
the surface of the electrode holder)
250°C (without water
drips or vapour on the
surface of the electrode
holder)
No. of elec-
trodes
1--- --- BF-1 BS-1
3PS-3S PS-31 --- ---
No. of electrodes Model
1 F03-14-1P
3 F03-14-3P
61F-GP-N2
2
Selection Guide for Electrodes, Connecting and Lock Nuts
Application Example
•Level control in tanks, reservoirs, sewage plants, underground
wells, mixing plants etc.
•Level control for element protection in pipes, channels, and irriga-
tion systems.
•Flow detection in pipes, channels, and irrigation systems.
•Ice bank control in cold drink dispensers, ice makers, water chillers,
bulk milk tanks, etc.
•Dispensing of liquids by volume.
•Indication of liquid buildup due to filter blockages.
•Pollution/foul water detection for rivers, drains, etc.
•Alarm control warning of abnormal or dangerously high or low lev-
els.
Specifications
*Secondary voltage of transformer
Applicable liquids Material Models for individual electrode assembly components
Electrode (1m long) Connecting nut Lock nut
Model Indication
mark
Model Inscription Model Inscription
Purified city water,
industrial water,
sewage
SUS-304
(AISI-304)
F03-01-SUS304 1 line F03-02-SUS304 --- F03-03-SUS304 ---
Purified city water,
industrial water,
sewage, dilute alka-
line solution
SUS316
(AISI-316)
F03-01-SUS316 2 lines F03-02-SUS316 6 F03-03-SUS316 6
Supply voltage 24, 110, 120, 220, 230, 240 VAC; 50/60 Hz
Operating voltage range 85% to 110% of rated voltage
Interelectrode voltage*8 VAC
Power consumption Approx. 3.2 VA
Operate resistance Approx. 4 KΩ min. Between electrode E1 and E3
Release resistance Approx. 15 KΩ max. Between electrode E2 and E3
Response time Operate: 80 ms max., Release: 160 ms max.
Control output 10 A, 250 VAC (at 40°C)
3 A, 250 VAC (at 55°C)
Insulation resistance 100 MΩ max. (at 500 VDC) between power terminals and electrode terminals, and between electrode
terminals and contact terminals
Dielectric strength 2,000 VAC, 50/60 Hz for 1 min., between power terminals and electrode terminals, and between elec-
trode terminals and contact terminals
Ambient temperature Operating: –10°C to 55°C
Ambient humidity Operating: 45% to 85%
Life expectancy Mechanical: 10,000,000 operations min.
Weight Approx. 190 g
61F-GP-N2
3
Connections
Automatic Water Supply and Drainage Control
1. Water supply
•Connect electromagnetic switch coil terminal A to Tb.
•The pump stops when the water level reaches E1 and starts when
the water level drops below E2.
2. Drainage
•Connect the electromagnetic switch coil terminal A to Ta.
•The pump starts when the water level reaches E1 and stops when
the water level drops below E2.
Note: 1. The diagram shows the connections for water supply. When
draining, change the connection Tb to Ta.
2. The earth terminal must be grounded.
Operation
The conductive type level controller consists of a plug-in controller
connected to a set of stainless steel probes. These are cut to length
and inserted vertically into the liquid. A low voltage is applied
between these probes and the earth probe (or tank, if it is electrically
conductive). The water provides a current between the earth probe
and the high-level probe. The output relay in the controller is ener-
gized when the water level reaches the high-level probe and de-ener-
gized when the water level falls below it.
For two-point control a low-level probe is used as well. In this case
the relay does not de-energize until the water level falls below the
low-level probe. Using the low-level probe allows a wide differential
between switching a pump on and off, and can avoid excessive pump
operation during tank emptying or filling. If this differential is not
required, the low-level probe need not be connected.
Dimensions
Note: All units are in millimeters unless otherwise indicated.
1
7
E1
E2
6
S1
S2
E3
8
2
3
5
Ta
Tb
Tc
Power source
220 or
240 VAC
MCCB
Electromagnetic
switch
Earth
Tank
Stop
Start
Reservoir
RST
4
A
MP
E1
E2
E3
91
61F-
GP-N2
PF083A
70
84
38
49.4
38
80
70
61F-GP-N2
4
■Electrode Holders
PS-3S
PS-31
BF-1
BS-1(S)
80
40 20
13 8026
92
E2
E1
E3
E1
E3 E2
E4
E2
E3
E4
E1
34 dia.
PF2 parallel thread
(effective dia.: 58.135)
9-dia. rubber
bushing (inner)
PF2 65 dia. hole
Used with coupling Used with mounting bracket
PS-3S/-3SR PS-4S/-4SR PS-5S/-5SR
Mounting Holes Screw Holes
26
Dust preventive rubber cap (optional)
11-dia.
PF1/2
27.5-dia.
* Standard holder construction includes three integral 300 mm length
electrodes. However, a type having 1,000 mm length electrodes is
available on request.
Mounting Holes
Rubber
packing
11
3
l*
712
32
38.5
PF1/2 Parallel thread
Electrode
SUS304
M3
φ4
(49)
48
20-dia.
18
2317 14
72
48 33
-dia.
60
Terminal bolt
SUS201 (M6)
Nut (M6)
Cast iron
Two M5 x 25
mounting
screws 26-dia. hole
Two, 6-dia. holes
Terminal bolt
SUS304 (M4) P=0.7
Width across flats: 20 Two M4
P=0.7
Nut (iron) M18 P=1.5
(fine screw thread)
M18
P=1.5
50 51
39
101
12
24-dia.
M18
P=1.5
50 51
39
101
12
Terminal bolt
SUS304 (M4) P=0.7
Width across flats: 20
Two, M4 P=0.7
24 dia.
M18 P=1.5
(fine screw thread)
BS-1
BS-1S
BS-1S-1
BS-1S2
61F-GP-N2
5
■Electrode Separators
F03-14 1P (for Single Pole) F03-14 3P (for Three Poles)
Precautions
■How to Mount Electrodes
Connecting Electrodes to Electrode Holders Connecting One Electrode to Another
■Application
When using electrodes in sea water or sewage, provide a sufficient
interval (normally 1 m) between the electrodes. If the sufficient inter-
val cannot be provided, employ a low-sensitivity type Floatless Level
Controller.
When taping one of the electrodes to prevent it from contacting the
other electrodes in water, do not tape the electrode entirely but leave
at least 100 mm of its end uncovered.
When the required length of the electrode is more than 1 m, use a
separator at each joint of two electrodes so as to prevent the elec-
trodes from contacting one another. (NOTE: Avoid use of the separa-
tors in dust-containing liquids.)
Usually, electrodes are used in a set of three: long, medium, and
short. Connect the short electrode to E1, the medium electrode to
E2, and the long electrode to E3. Make E3 at least 50 mm longer
than E2.
Electrodes are in actual contact with the liquid. Standard electrodes
are made of stainless steel and usable in purified water, sea water,
sewage, acid (except acetic acid, sulfuric acid, etc.) and alkaline liq-
uids, although they may corrode depending upon the temperature
and working conditions.
Note that the Conductive Level Controller 61F-GP-N2 is capable of
controlling liquids with specific resistances of up to 30 kΩ-cm when
the controller employs a type PS-3S electrode holder with the elec-
trode(s) submerged to a depth of 30 mm max.
6.5-dia.
28-dia.
41-dia.
Three 7-dia.
Electrode holder
Clamp screw
Connecting nut
1. Spin a lock nut and a spring
washer onto the electrode.
2. Fully fit the electrode into the
connecting nut attached to the
electrode holder.
3. Tighten the electrode with
the two clamp screws.
Spring washer
Lock nut
Electrode
4. Secure the connecting
nut by tightening the lock
nut and spring washer.
Electrode
Connecting nut
1. Spin a lock nut and a spring
washer onto the electrode.
3. Tighten the electrode with
the two clamp screws.
Spring washer
Lock nut
4. Secure the connecting
nut by tightening the lock
nut and spring washer.
Spring
washer
2. Fully fit the
electrode into the
connecting nut
attached to the
electrode holder.
50 mm min.
1 m1 m
E1
E2
E3
Kind of water Specific resistance Applicable type
City water 5 to 10 kΩ-cm General-purpose type
Well water 2 to 5 kΩ-cm General-purpose type
Industrial water 5 to 15 kΩ-cm General-purpose type
Rainwater 15 to 25 kΩ-cm General-purpose type
Sea water 0.03 kΩ-cm Low-sensitivity type
Sewage 0.5 to 2 kΩ-cm Low-sensitivity type
Distilled water 100 kΩ-cm or less High-sensitivity type
Over 100 kΩ-cm Consult OMRON
61F-GP-N2
6
■Safety Precautions
!WARNING
!CAUTION
Precautions for Safe Use
1. Precautions for the environment
•Use and preserve within the proper temperature and humidity
described in the specifications.
•Temperature of surroundings for preservation (including during
transportation) and use: −10 to 55°C, humidity: 45 to 85%.
•Do not install, among others, near heat devices such as coils or
other devices having coils, etc.
•Avoid preserving (including during transportation) and using in a
humid place, in a corrosive gas environment, outdoors and in a
place which receives direct sunlight.
•Preserve and use without exposing to danger of explosion, flamma-
ble dust, gas and vapor, excessive dust, and saline spray or drop-
lets.
•Avoid preserving (including during transportation) and using in a
place which is vulnerable to flooding or oil spillage.
•Avoid preserving (including during transportation) and using in a
place where vibrations and impacts are strong. Similarly, avoid
using next to a high-capacity contactor which may impacts at oper-
ation. Doing so causes malfunctions such as chattering, etc.
•Do not install the product near devices generating strong high-fre-
quency waves or surges. When using a noise filter, check the volt-
age and current and install it as close to the product as possible.
2. Cautions for Use
•Read the instruction manual and catalog before operating and
maintaining the product.
•Fit socket(s) and DIN rail(s) so that the screws are tight.
If the screws are not tight, DIN rail(s), socket(s), the product and
cable(s) may lead to come off.
•Be sure to fit socket(s) to DIN rail(s) without fail.
•Use metal strengthener(s) to maintain a firm connection between
the product and socket(s).
•Read the instructions manual and catalog before the operation and
maintenance of the product.
•When fitting crimping terminal(s) to terminal screw(s), use a tight-
ening torque of between 0.45 and 0.6 N·m
•Use power supply of appropriate specifications to provide control
source(s), inputs, etc., and to wire cables.
[Recommended cable to wire between the model 61F and elec-
trode(s) when using three-core cabtire cable(s) of completely insu-
lated 600 V 0.75 mm VCT: 50 m max.]
•Do not put power line(s), high-voltage cable(s) and wire(s) of elec-
trode circuit(s) in the same duct nor wire closely. Doing so causes
malfunctions by getting vulnerable to induction noise.
•Shorten the distance for wiring between the model 61F and elec-
trode holders as much as possible. Long distance for wiring may
causes malfunctions because stray capacitance may influence
operation, or abnormal surges or noise may run through electrode
circuit(s).
•Be sure to ground common electrode terminal(s). Doing so can
reduce some effects of noise.
•Use the product within the noted supply voltage and rated load.
•Before using, recheck the application, wiring, power supply, etc.
•Check the application and power supply.
Power supply (AC 220 V, AC 230 V) consists of other specifications.
If the power voltage is not AC 200 V or AC 100 V, follow the instruc-
tions described on the device.
•Firmly ground the earth terminal No.4.
•Make sure that electrode probes in the liquid do not come in con-
tact one another as it may cause malfunction. Use separator when
connecting.
•Tighten nuts for electrode probe(s) firmly.
•Prevent flotage from attaching to electrode.
•This device is not available when the resistance is too high and is
not conductive such as oil.
Do not touch the terminals while power is being supplied.
Doing so may possibly result in electric shock. Make sure
that the terminal cover is installed before using the
product.
Do not attempt to disassemble, repair, or modify the
product. Doing so may occasionally result in minor or
moderate injury due to electric shock.
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Terms and Conditions Agreement
Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you
have any questions or comments.
Warranties.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the
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Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
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recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
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See http://www.omron.com/global/ or contact your Omron representative for published information.
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WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
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Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
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with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
Change in Specifications.
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our
practice to change part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2014.1
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2014 All Right Reserved.
