Serviceline Industrial Sensors
Serviceline Explosion Protection
Not available for purchase
Not available for purchase

Capacitive limit switch LCL*

  • Complete unit consisting of the probe and electronic insert
  • Integrated active build-up compensation: exact switch point, even with strong build-up
  • Mechanically rugged: no wearing parts, long operating life, maintenance-free
  • Rope probe can be shortened for optimum matching to the measuring point
  • ATEX approval for zone 20 (dust)

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  LCL*

Function principleLimit detection
Maximum or minimum detection in silos with all types of solid granulates, even in dust explosion hazardous areas.
Function and system design
Measuring principleA metal plate at the end of the probe, within the insulation, and the surroundings (e. g. the silo walls) combine to form the two electrodes of a capacitor. If the probe is covered or free of material, then the capacitance changes and the LCL switches.
Input characteristics
Measured variablelimit level (limit value)
Measurement rangeLCL1: dielectric constant ≥ 1.6
LCL2: dielectric constant ≥ 1.5
Mediumbulk solids, grain size max. 30 mm (1.2 inch), density min. 200 g/l, dielectric constant ≥ 1.6
Output characteristics
Output signalconnection E5: switching PNP, Imax = 200 mA
- overload and short circuit protection
- residual voltage at transistor at Imax < 2.9 V
connection WA: contact change-over, potential-free
- Umax = 253 V
- Imax = 4 A (AC)
- Pmax = 1000 VA, cos φ = 1, Pmax = 500 VA, cos φ > 0.7
Signal on alarmconnection E5: < 100 µA
connection WA: relay de-energized
Fail-safe modeminimum/maximum quiescent current safety can be switched at electronic insert

connection E5 with PNP output:
maximum fail-safe mode:
The switch output is blocked when the probe is covered or the power supply fails.
minimum fail-safe mode:
The switch output is blocked when the probe is free or the power supply fails.

connection WA with relay output (potential-free change-over contact):
maximum fail-safe mode:
The relay is de-energised when the probe is covered or the power supply fails.
minimum fail-safe mode:
The relay is de-energised when the probe is free or the power supply fails.
Switching timeLCL1: approx. 0.5 s when covering and uncovering
LCL2: approx. 0.8 s when covering and uncovering
Switch-on responseLCL1: correct switching after max. 1.5 s
LCL2: correct switching after max. 2 s
Auxiliary energy
Electrical connectionsee section electrical connection
Supply voltageelectrical connection E5: 10.8 ... 45 V DC, short-term pulse on 55 V DC
electrical connection WA: 20 ... 235 V AC, 50/60 Hz or 20 ... 55 V DC
Connecting cableterminal connection: lace max. 1.5 mm2 in end splice, wire max. 2.5 mm2
Current consumptionelectrical connection E5: max. 30 mA, reverse-polarity-proof
electrical connection WA: max. 130 mA
Measurement accuracy
Reference operating conditionsvessel type: plastic vessel, ambient temperature: 73 °F (23 °C, 296 K), medium temperature: 73 °F (23 °C, 296 K)
medium pressure pe: 0 bar, medium: dielectric constant = 2.6, conductivity: < 1 µS
sensitivity setting: C
HysteresisLCL1: horizontal 4 mm (0.16 inch), vertical 7 mm (0.28 inch)
LCL2: vertical 5 mm (0.2 inch)
Long-term driftLCL1: horizontal 3 mm (0.12 inch), vertical 6 mm (0.24 inch)
LCL2: vertical 6 mm (0.24 inch)
Influence of medium temperaturedepending on the filling material
Operating conditions
Installation conditions
Installation positionLCL1: optional
LCL2: vertically down
Note the angle of the material mounds and the outlet funnel when determining the mounting point or probe length. The limit switch switches when the probe tip is covered by a few centimetres of material or when it is free material flow should not be directed at the probe.
Mounting locationThe capacitive limit switch can be installed in silos made of different materials (e. g. metal, plastic, concrete).
Ambient conditions
Ambient temperature-40 ... 70 °C (-40 ... 158 °F) (-40 ... 140 °F (-40 ... 60 °C, 233 ... 333 K), dust-Ex version)
see section temperature ranges
Ambient temperature limits-40 ... 80 °C (-40 ... 176 °F) (-40 ... +140 °F (-40 ... +60 °C, 233 ... 333 K), Dust-Ex version)
see section temperature ranges , grey background
Storage temperature-40 ... 80 °C (-40 ... 176 °F)
Shock resistanceprobe: 7J
Overvoltage protectedovervoltage category III
Process conditions
Process temperatureLCL1: -40 ... 120 °C (233 ... 393 K) (-40 ... 80 °C (233 ... 353 K), dust-Ex version)
LCL2: -20 ... 70 °C (253 ... 343 K)
see section temperature ranges
Process temperature limitsLCL1: -40 ... 130 °C (233 ... 403 K) (-40 ... 80 °C (233 ... 353 K), dust-Ex version)
LCL2: -40 ... 80 °C (233 ... 353 K)
see section temperature ranges , grey background
Medium pressure limitsLCL1: -1 ... 25 bar
LCL2: -1 ... 6 bar
Mechanical specifications
Degree of protectionIP66
Mechanical construction
Construction typeLCL1: compact version with rod probe
LCL2: version with rope probe
Dimensionshousing: LCL1 Ø94 x 140 mm (3.7 x 5.5 inch), LCL2 Ø94 x 145 mm (3.7 x 5.7 inch)
process connections: see section dimensions
probe: LCL1 length 140 mm (5.5 inch), LCL2 length 500 ... 6000 mm (1.7 ... 20 ft)
MassLCL1: 560 g
LCL2: 1230 g (basic weight for 500 mm probe length)
Materialhousing: PBT-FR with cover in PBT-FR or with transparent cover in PA12, seal of cover: EPDM
cable gland: polyamide or brass, nickel-plated
wetted parts:
- rod probe: PPS Polyphenylenesulphide (glass fiber content 40 %)
- rope probe: armoured steel with HD-PE coating
- other probe components: PPS Polyphenylenesulphide (glass fiber content 40 %)
Mechanical loadLCL1: flexural strength 1400 N (at probe tip)
LCL2: tensile strength max. 3000 N up to 40 °C (313 K), max. 2800 N at 80 °C (353 K)
Switching pointsensor switch points depend on the mounting location in relation to the reference operating conditions
LCL1: horizontal centre of probe -5 mm (-0.2 inch), vertical 40 mm (1.6 inch) above tip of the probe
LCL2: vertical 35 mm (1.4 inch) above tip of the probe
Process connection- conical thread R1, R1-1/2 to DIN 2999, part 1
- conical thread NPT1, NPT1-1/2 to ANSI B 1.20.1
Indication and operation
Display elementsgreen LED: standby indication
red LED: switch status indication
Control elementsswitch on electronic insert
- switching between minimum and maximum fail-safe mode
- sensitivity setting (depends on the dielectric constant and build-up). A sensitivity adjustment is normally not required.
Certificates and approvals
Explosion-hazardous areaLCL1: DMT 01 ATEX E 122, LCL2: KEMA 01 ATEX 1149 , for additional certificates see
Type of protectionEx-Hexagon II 1/3D IP66 T97°C (DMT 01 ATEX E122)
Ex-Hexagon II 1/3D [EEx ia] IIB T97°C (KEMA 01 ATEX 1149)
Overspill protectionLCL1: Z-65.13-313 (overspill protection in acc. with WHG)
General information
Directive conformity
Directive 73/23/EEC
(Low Voltage Directive)
EN 61010-1
Directive 89/336/EEC (EMC)emitted interference to EN 61326, class B equipment
noise immunity to EN 61326, annex A (industrial sector)
Directive 94/9/EC (ATEX)EN 50014, EN 50020, EN 50281-1-1
Electromagnetic compatibilityNE 21
Degree of protectionEN 60529
Climate classEN 60068, part 2-38, fig. 2a
Vibration resistanceEN 60068-2-64, 20 ... 2000 Hz, spectrale rate of velocity 0.5, 100 min per axis
Supplementary documentationtechnical information TI-LCL
operating instructions KA093O (LCL1)
operating instructions KA094O optimising performance (LCL1)
operating instructions KA098O adapter for LCL1 (LCL-Z11, LCL-Z12)
operating instructions KA099O transparent cover (LCL-Z10)
operating instructions KA155O (LCL2)
operating instructions KA156O fail-safe mode (LCL2)
operating instructions KA157O rope shortening for LCL2 (LCL-Z14)
safety information SI092O (LCL2, KEMA 01 ATEX 1149)
safety information SI011O (LCL1, DMT 01 ATEX E 122)
approval ZE232O overspill protection (Z-65.13-313)
Supplementary informationEC-Type Examination Certificate, Statement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information see


ECLASS 11.027200503
ECLASS 10.0.127200503
ECLASS 9.027200503
ECLASS 8.027200503
ECLASS 5.127200503
ETIM 8.0EC002993
ETIM 7.0EC002993
ETIM 6.0EC002993
ETIM 5.0EC001447
UNSPSC 12.141111950

Approvals+Certificates: LCL*

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-2547APDF78 KB
EU-Declaration of conformity / EU-KonformitätserklärungDOC-2220APDF81 KB
Canada CSACoC 212978PDF251 KB
Europe DEKRA ATEX Category 1/3 DKEMA 01 ATEX 1149PDF943 KB
Europe DEKRA EXAM ATEX Category 1/3 DDMT 01 ATEX E 122PDF764 KB
USA FMCoC 3012925PDF60 KB
USA FMCoC 3013716PDF52 KB

Function: LCL*

The capacitive limit switch is designed for limit detection of light bulk solids, e. g. grain products, flour, milk powder, animal feed, cement, chalk or plaster.


  • LCL1 with 140 mm (5.5 in) rod probe, for bulk solids and liquids

  • LCL2 with rope probe up to 6 m (20 ft), for bulk solids

  • Relay output (potential-free change-over contact) with AC or DC connection

  • PNP output with 3-wire DC connection