Pepperl+Fuchs LKL-P*

Name: Conductive Level Limit Switch
Brand: Pepperl+Fuchs
SKU: LKL-P*
Availability: OutOfStock

Conductive Level Limit Switch

SKU: LKL-P*

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The Conductive Level Limit Switch is designed for precise level detection of conductive liquids, capable of identifying up to five level limits with a single probe. Its design features no moving parts within the tank, ensuring reliability and maintenance-free operation.

All description

Manufacturer: Pepperl+Fuchs

Description:

The Conductive Level Limit Switch represents an advanced solution for level measurement and control in various applications involving conductive liquids. This switch operates by detecting changes in conductivity, enabling it to function effectively without the need for calibration. Its ability to detect multiple level limits with a single probe enhances flexibility in instrumentation, making it suitable for a wide range of industrial processes.

Common applications include overfill protection and leak detection systems, compliant with the Water Resources Act (WHG). The switch offers options between rod and rope configurations, allowing for optimal adaptation to specific tank designs and functional requirements. The absence of moving parts within the tank minimizes wear and tear, resulting in a robust and reliable solution for continuous level monitoring.

Signal on alarm

output N1 (FEW58): output signal with damaged sensor < 1 mA

Influence of ambient temperature

< 0.05 %/K

Electromagnetic compatibility

NE 21

Display elements

separate instrument version: dependent on the connected switching unit
compact instrument version:
output E5 (FEW52), WA (FEW54):
– one red light emitting diode: fault message, switching status
– one green light emitting diode: operation
output N1 (FEW58):
– one yellow light emitting diode: fault message, switching status
– one green light emitting diode: operation

Current consumption

Output E5 (FEW52): I < 25 mA (without load)
output WA (FEW54): 60 mA

Material

probes:
– rods: rod 1.4404/316L, insulation: PP
– ropes: rope 1.4571/316Ti, insulation FEP, weight 1.4435/316L
housing:
– output NA (separate instrument version): housing PPS, cover PBT
– output E5/WA/N1 (compact instrument version): housing PBT, cover PBT, adapter PBT
process connections: PPS

Contact loading

output WA (FEW54): 253 V AC/4 A, 30 V DC/4 A, 150 V/ 0.2 A

Supplementary documentation

technical information TI375O
operating instructions KA203O (LKL-P* without electronic insert)
operating instructions KA204O (LKL-P* with integrated electronic insert)
safety information SI230O (TV 03 ATEX 2295)
safety information SI226O (

II 3G EEx nA [L] IIC T6 or nC [L])
approval ZE043O overspill protection acc. to WHG (Z-65.13-378)
approval ZE257O leak detection system (Z-65.40-379)

Equipment architecture

probe with integrated electronic insert (compact instrument version)
probe without integrated electronic insert (separate instrument version) for one, two or multiple point detection respectively, see section measuring system

Degree of protection

IP66

Load

Output E5 (FEW52):
The load is switched via a transistor (PNP),
cycled overload and short-circuit protection, continuous 200 mA (short-circuit proof), residual voltage at transistor at I_max 2.9 V
Output WA (FEW54):
Loads are switched via 2 potential-free change-over contacts.
I~ max. 4 A, U~ max. 253 V
P~ max. 1000 VA, cos andphi; = 1, P~ max. 700 VA, cos andphi; > 0.7
I- max. 4 A to 30 V, I- max. 0.2 A to 150 V
When connecting a functional extra-low voltage circuit with double insulation in accordance with IEC 1010: The sum of the relay output and power supply voltages is max. 300 V.
output N1 (FEW58): refer to datasheet of the connected switch amplifier acc. to IEC 60947-5-6 (NAMUR)

Fail-safe mode

Selecting the correct fail-safe mode ensures that the relay/the output always runs in quiescent current fail-safe.
output E5 (FEW52):
– maximum fail-safe: The output signal is < 1 mA if the switch point is exceeded (probe covered), a fault occurs or the power supply fails.
– minimum fail-safe: The output signal is < 1 mA if the switch point is undershot (probe uncovered), a fault occurs or the power supply fails.
Output WA (FEW54):
– maximum fail-safe: The relay de-energises when the switch point is exceeded (probe covered), a fault occurs or the power supply fails.
– minimum fail-safe: The relay de-energizes when the switch point is undershot (probe uncovered), a fault occurs or the power supply fails.
output N1 (FEW58):
– maximum fail-safe: The output voltage is 0 V if the switch point is exceeded (probe covered), a fault occurs or the power supply fails.
– minimum fail-safe: The output voltage is 0 V if the switch point is undershot (probe uncovered), a fault occurs or the power supply fails.

Mass

separate instrument version:
– rod, 1 m (3 ft) long, LKL-P1 with 2, 3 or 5 rods: 415 g, 530 g, 760 g
– rope, 1 m (3 ft) long, LKL-P2 with 2, 3 or 5 ropes: 390 g, 470 g, 640 g
compact instrument version:
– rod, 1 m (3 ft) long, LKL-P1 with 2 or 3 rods (600 g/720 g)
– rope, 1 m (3 ft) long, LKL-P2 with 2 or 3 ropes (710 g/800 g)

Supplementary information

EC-Type Examination Certificate, Statement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information see www.pepperl-fuchs.com.

Control elements

– one DIL switch for min/max position
– one DIL switch for 0 s or 2 s switching delay
– two DIL switches for setting the measuring ranges 100 andOmega;, 1 kandOmega;, 10 kandOmega;, 100 kandOmega;

Process connection

– cylindrical thread G1A to DIN ISO 228/1
– conical thread 1 NPT to ANSI B 1.20.1

Hysteresis

-10 % for the max probe, in reference to the switch point, andDelta;s function deactivated

Overspill protection

see approval (ZE)

Vibration resistance

EN 60068-2-64

Measurement range

A total of four measuring ranges (100 andOmega;, 1 kandOmega;, 10 kandOmega;, 100 kandOmega;) can be set via two DIL switches (SENS). The setting on delivery is 100 kandOmega;.

Probe

rod probes: compact instrument version 2 or 3 rods, separate instrument version 2, 3 or 5 rods
– diameter without insulation: events corrosion of the probes and electrolytic destruction of the product. The material used for the tank walls is not important for measurement because the system is designed as a closed potential-free circuit between the probes and the electronics. There is absolutely no danger if the probes are touched during operation.

Input signal

probes covered – A measurable current is flowing between the probes.
probes uncovered – There is no measurable current flowing between the probes.

Supply voltage

Output E5 (FEW52):
supply voltage 10.8 … 45 V DC
load connection: open collector; PNP
switching voltage: max. 45 V
Output WA (FEW54):
supply voltage 20 … 55 V DC or 20 … 253 V AC, 50/60 Hz
peak inrush current: max. 2 A, max. 400 µs
output: two potential-free change-over contacts
output N1 (FEW58): refer to datasheet of the connected switch amplifier acc. to IEC 60947-5-6 (NAMUR)

EU-Type Examination Certificate

TV 03 ATEX 2295

Non-repeatability

± 5 % at 0.1 … 100 kandOmega;
± 1 % at 1 … 10 kandOmega;

Switching time

< 3 s

Switching delay

A switching delay of 2.0 s can be activated or deactivated via a DIL switch.
If the switching delay is set to 0 s, the device switches after approx. 0.3 s.

Dimensions

LKL-P1:
– housing: max. PEPPERL+FUCHS/Explosion Protection/Level Measurement;LMC-Ex;0.00;pepperl-fuchs-lmc-ex;0;0;Pepperl+Fuchs;;;;;;Magnetic Immersion Probe for Continuous Measurement;;