IFM LI213 Series User manual

Operating instructions
Binary level sensor for overflow prevention / leakage
detection according to WHG
LI213x
11462742 / 0007 / 2022
GB

LI213x Binary level sensor for overflow prevention / leakage detection according to WHG
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Contents
1 Preliminary note ............................................................. 3
1.1 Symbols used.......................................................... 3
2 Safety instructions............................................................ 4
3 Intended use................................................................ 5
3.1 Type designation........................................................ 5
3.2 Application area ........................................................ 5
3.3 Restriction of the application area........................................... 5
4 Function ................................................................... 6
4.1 Measuring principle level.................................................. 6
4.2 Measuring principle temperature............................................ 6
4.3 Features of the device.................................................... 6
4.4 IO-Link ............................................................... 7
4.5 Application examples .................................................... 7
5 Installation.................................................................. 9
5.1 Mechanical installation ................................................... 9
5.2 Determining the installation depth, installation distances. . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Electrical connection.......................................................... 12
7 Parameter setting............................................................ 13
7.1 Parameter setting via the teach button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.2 Operating status and switching status indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.3 Unlock device.......................................................... 14
7.4 Empty adjustment....................................................... 14
7.4.1 Application as overflow prevention or maximum monitoring . . . . . . . . . . . . . . . . . . . 14
7.4.2 Application as leakage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.5 Full adjustment......................................................... 16
7.5.1 Application as overflow prevention or maximum monitoring . . . . . . . . . . . . . . . . . . . 16
7.5.2 Application as leakage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.6 Parameter setting via IO-Link.............................................. 17
7.6.1 Parameter setting via the memory plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.7 Adjustable parameters and system commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.8 Parameter setting examples via IO-Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.8.1 Application as overflow prevention or maximum monitoring . . . . . . . . . . . . . . . . . . . 20
7.8.2 Application as leakage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8 Operation .................................................................. 21
8.1 Function check......................................................... 21
8.2 Operation indication by LEDs (factory setting). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
9 Maintenance, repair and transport................................................ 22
10 Factory setting .............................................................. 23

Binary level sensor for overflow prevention / leakage detection according to WHG LI213x
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1 Preliminary note
You will find instructions, technical data, approvals and further information using the QR code on the
unit / packaging or at www.ifm.com.
1.1 Symbols used
Requirement
Instructions
Reaction, result
[...] Designation of keys, buttons or indications
Cross-reference
Important note
Non-compliance may result in malfunction or interference.
Information
Supplementary note

LI213x Binary level sensor for overflow prevention / leakage detection according to WHG
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2 Safety instructions
• The unit described is a subcomponent for integration into a system.
– The system architect is responsible for the safety of the system.
– The system architect undertakes to perform a risk assessment and to create documentation in
accordance with legal and normative requirements to be provided to the operator and user of
the system. This documentation must contain all necessary information and safety instructions
for the operator, the user and, if applicable, for any service personnel authorised by the
architect of the system.
• Read this document before setting up the product and keep it during the entire service life.
• The product must be suitable for the corresponding applications and environmental conditions
without any restrictions.
• Only use the product for its intended purpose (Ò Intended use).
• If the operating instructions or the technical data are not adhered to, personal injury and/or damage
to property may occur.
• The manufacturer assumes no liability or warranty for any consequences caused by tampering with
the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the product must be
carried out by qualified personnel authorised by the machine operator.
• Protect units and cables against damage.
• Only use the product for permissible media (Ò Technical data).
• The unit complies with the standard EN 61000-6-4 and is a class A product. The unit may cause
radio interference in domestic areas. If interference occurs, the user must take appropriate actions.

Binary level sensor for overflow prevention / leakage detection according to WHG LI213x
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3 Intended use
The device described here is approved according to WHG (German Federal Water Act, federal
law applicable in the Federal Republic of Germany). If the device is used as an overflow
prevention or leakage sensor according to WHG, the respective “Technical Description” (only
available in German) must be observed in addition to this documentation.
The device monitors the level (point level) and the temperature of liquid media in tanks.
It is particularly suitable for monitoring the overfilling of tanks as part of an overflow prevention system
according to WHG.
It is also particularly suitable as part of a leakage detection system in accordance with WHG to monitor
the leakage of liquid media in collection rooms, collection systems, inspection chambers and hoppers.
3.1 Type designation
Level sensor type LI213x (x = probe length coded).
3.2 Application area
Water, hydrous media, oils, oil-based media, emulsions.
3.3 Restriction of the application area
• Use the product only for media to which the wetted materials are sufficiently resistant (→ Technical
data sheet).
• The device is not suitable for hygienic areas.
• The device is not suitable for applications where the probe is subjected to permanent and high
mechanical stress (e.g. bulk materials, abrasive media or fast flowing media containing solid
particles).
• Highly conductive foam can trigger a switching operation. Check the consequences by performing
a test in your application!

LI213x Binary level sensor for overflow prevention / leakage detection according to WHG
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4 Function
4.1 Measuring principle level
The device operates on the capacitive measuring principle. It detects by direct contact with the
medium whether the requested level (point level) is reached.
The relative permittivity of a medium is important for its detection (formerly: dielectric constant). Media
with a relative permittivity greater than 1.8 are reliably detected.
Electrically conductive and non conductive media are detected.
Relative permittivity (dielectric constant) of common media
Mineral oil ≈ 2
Coolant emulsion ≈ 25...75
Glycol ≈ 37
Water ≈ 80
1
The device operates with radial detection characteristics. Therefore,
media below the active zone (1) are not detected.
When perfectly adjusted, the presence of certain media can be detected while build-up or foam
is suppressed.
4.2 Measuring principle temperature
The temperature is detected by a temperature element at the lower end of the probe and electronically
evaluated.
4.3 Features of the device
• The device versions are offered with different probe lengths.
• Point level selectable by the installation length.
• Parameter setting via teach button or IO-Link.
• The device has two switching outputs:
– Output OUT-OP is permanently assigned to the process value level (limit level) and is
permanently designed as normally closed.
– Output OUT2 can be assigned to either the process value level (limit level) or temperature and
can be programmed as normally closed / normally open.
• Adjustment function (empty and full adjustment) to the medium to be detected.
• Defined state in case of a fault.

Binary level sensor for overflow prevention / leakage detection according to WHG LI213x
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4.4 IO-Link
IO-Link is a communication system for connecting intelligent sensors and actuators to automation
systems. IO-Link is standardised in the IEC 61131-9 standard.
General information on IO-Link at io-link.ifm
Input Output Device Description (IODD) with all parameters, process data and detailed
descriptions of the device at documentation.ifm.com
IO-Link offers the following advantages:
• Interference-free transmission of all data and process values
• Parameter setting in the running process or presetting outside the application
• Parameters for identifying the connected devices in the system
• Additional parameters and diagnostic functions
• Automatic backup and restore of parameter sets in case of device replacement (data storage)
• Logging of parameter sets, process values and events
• Device description file (IODD - Input Output Device Description) for easy project planning
• Standardised electrical connection
• Remote maintenance
4.5 Application examples
Overflow prevention in a supply tank for coolant emulsion
Leakage monitoring in the overflow vessel of a hydraulic power pack

LI213x Binary level sensor for overflow prevention / leakage detection according to WHG
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Minimum level monitoring

Binary level sensor for overflow prevention / leakage detection according to WHG LI213x
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5 Installation
5.1 Mechanical installation
The installation position is vertical, the required immersion depth until the response level is reached
must be taken into account during installation Determining the installation depth, installation distances
(Ò/9)
Screw-in or flange adapters are available for installation. After attaching this mounting accessory, the
probe can be passed through the opening. Use the enclosed stainless steel tube clip to determine the
setting value (installation height). The tightening of the coupling nut allows the fixation of the response
level following the already completed installation.
Use seals resistant to media.
5.2 Determining the installation depth, installation distances
The installation depth must be selected so that the active zone (MET) is safely covered by the liquid to
be monitored and the medium is safely detected.
The immersion depth at which the device switches depends on the medium and the installation
situation and is a maximum of 28 mm. Use suitable mounting accessories and enclosed stainless
steel tube clip to set and mark the response level.

LI213x Binary level sensor for overflow prevention / leakage detection according to WHG
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Application as overflow prevention:
MET
L3
A
H
L1
L
L2
S
M
A: Response level
H: Tank height
L: Probe length
L1: Insertion depth
L2: Outside length
L3: Installation depth (min.: 60mm)
M: Height mounting adapter
MET: Maximum immersion depth (active zone) = 28 mm
S: Nozzle height
uMake sure that the active zone is at least 20 mm away from metallic tank walls or structures in the
tank and at least 5 mm from the tank floor.