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

Vibration Limit Switch LVL-M*

  • Level limit switch for liquids
  • Large selection of process connections: universal use
  • Wide variety of electronic modules (e. g., relay, thyristor signal output): the right connection for every process control system
  • No calibration: quick and low-cost start up
  • No mechanically moving parts: maintenance-free, no wear, long operating life
  • Monitoring of the vibrating fork for damage: guaranteed function
  • PROFIBUS PA protocol: commissioning and maintenance quick and easy
  • Up to SIL 2 acc. to IEC 61508

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  LVL-M*

Function principleLimit detection
maximum or minimum detection in tanks or pipelines containing liquids of any kind, even in hazardous areas
Function and system design
Measuring principleThe forks of the sensors vibrate at their intrinsic frequency. This frequency is reduced when covered with liquid.
The change in frequency then activates the limit switch.
Input characteristics
Measured variablelimit level (limit value)
Measurement rangeLVL-M1: depends on mounting point
LVL-M2: depends on mounting point and pipe extension up to 6000 mm (20 ft)
Medium densityadjustment on the electronic insert > 0,5 g/cm3 or > 0,7 g/cm3 (other on request)
Output characteristics
Fail-safe modeswitch-over for minimum/maximum residual current safety on electronic insert
MAX = maximum safety:
The output switches to the power fail response when the fork is covered.
for use with overspill protection for example
MIN = minimum safety:
The output switches to the power fail response when the fork is exposed.
for use with dry running protection for example
Switching timewhen fork is covered: approx. 0.5 s, when fork is exposed: approx. 1.0 s (other switching times on request)
additionally configurable for PROFIBUS PA (electronic insert FEL50A (PA)): 0.5 ... 60 s
Switch-on responseWhen switching on the power supply the output assumes the alarm signal. After max. 2 s it assumes the correct switching mode.
Auxiliary energy
Supply voltageelectronic insert FEL50A (PA): 9 ... 32 V DC
electronic insert FEL51 (AC): 253 V AC, 50/60 Hz
electronic insert FEL52 (E5): 10 ... 55 V DC
electronic insert FEL54 (WA): 19 ... 253 V AC, 50/60 Hz or 19 ... 55 V DC
electronic insert FEL55 (SI): 11 ... 36 V DC, PLC
electronic insert FEL56 (N1), FEL58 (N2): isolating amplifier acc. to EN 60947-5-6 (NAMUR)
Connecting cableelectronic inserts: cross section max. 2.5 mm2, lace in end splice in acc. with DIN 46228
ground lead in housing: cross section max. 2.5 mm2
external equipotential bonding: cross section 4 mm2
Power consumptionelectronic insert FEL52 (E5): max. 0.83 W
electronic insert FEL54 (WA): max. 1.3 W
Current consumptionelectronic insert FEL52 (E5): max. 15 mA
Measurement accuracy
Reference operating conditionsambient temperature: 23 °C (73.4 °F), medium temperature: 23 °C (73.4 °F),
product density: 1 g/cm3 (water), viscosity: 1 mm2/s, medium pressure pe: 0 bar,
sensor mounting: vertical from above, density switch: to > 0.7 g/cm3
Maximum measured errormax. ± 1 mm, specified by mounting position
Non-repeatability0.1 mm
Hysteresisapprox. 2 mm
Influence of medium densitymax. +4.8 ... -3.5 mm (0.5 ... 1.5 g/cm3)
Influence of medium temperaturemax. +1.4 ... -2.8 mm (-40 ... 150 °C (-40 ... 302 °F))
Influence of medium pressuremax. 0 ... -2.5 mm (-1 ... 64 bar)
Operating conditions
Installation conditions
Installation positionLVL-M1: any position
LVL-M2: with short pipe (up to 500 mm (19.7 inch)) any position, with long pipe vertical
Ambient conditions
Ambient temperature-50 ... 70 °C (223 ... 343 K) , function with reduced data values
see section ambient temperature
Storage temperature-50 ... 80 °C (223 ... 353 K)
Overvoltage protectedelectronic insert FEL51 (AC), electronic insert FEL52 (E5), electronic insert FEL54 (WA), electronic insert FEL55 (SI): overvoltage category III
Process conditions
Medium temperature-50 ... 150 °C (-58 ... 302 °F), for exceptions see process connections
Medium pressurepe = -1 ... 64 bar (-14.5 ... 928.3 psi) over the entire temperature range , exceptions see process connections
Test pressuremax. 100 bar (1.5 times the medium pressure pe), no function during test pressure, burst pressure of diaphragm 200 bar
Thermal shock resistancemax. 120 °C/s (max. 120 K/s)
State of aggregationliquid
Densitymin. 0.5 g/cm3 (compact housing 0.7 g/cm3), other density settings on request
Viscositymax. 10000 mm2/s (max. 10000 cSt)
Solid contentsmax. ∅ 5 mm
Mechanical specifications
Degree of protectionpolyester, steel, and aluminum housing: IP66/IP67
compact housing:
- IP65 with valve connector PG11 or 1/2NPT
- IP66/IP68 with M12 x 1 connector without LEDs (1.4435/316L)
- IP69K with M12 x 1 connector with LEDs (1.4435/316L)
Mechanical construction
Construction typeLVL-M1: compact design
LVL-M2: version with extension tube
Dimensionshousing: diameter max. 85 mm, height max. 173 mm
temperature separator, flameproof bushing: additional length L 140 mm
process connection: length L 66.5 ... 80 mm
extension: any length L from 148 ... 3000 mm, depending on the process connection
extension: length type II, for vertical installation from above same switching point as
Vibracon LVL1, LVL2
vibration fork: width 17.5 mm, fork width 10 mm, length 25 mm
Mass600 g , basic weight: compact sensor, electronic insert, stainless steel housing, process connection G2*, additional weight is dependent on extension tube, housing and process connection
Additional weightprocess connections:
- A3* 1000 g, A4* 1200 g, A5* 1500 g, A6* 2400 g, A72 4800 g, A81 4900 g, A82 6800 g, A91 7000 g,
A92 11.5 kg, A93 17.3 kg
- C45 1400 g, C51 1200 g, C71 1600 g, C75 3200 g, C95 5900 g, CA3 5600 g
- D45 1400 g, D51 1200 g, D71 1600 g, D75 3200 g, D7A 300 g, D7D 300 g, D95 5900 g, DA3 5600 g
- F45 1400 g, F51 1200 g, F55 2000 g, F61 1400 g, F65 2400 g, F71 1600 g, F75 3200 g, F7F 2600 g,
F81 2400 g, F85 4300 g, F93 4800 g, F95 5900 g, FA3 5600 g, FA5 7500 g
- G3* 200 g
- J13 no information, J16 no information, J17 1700 g, J19 no information, J1A no information, J1C 1700 g
- N3* 200 g, N75 2900 g
- R3* 200 g
- T51 no information, T61 100 g
extension tube, tempeprature spacers, flameproof bushings:
- B* 900 g/m, C* 2300 g/100 inch
- D* 100 g
- J* 900 g/m and 600 g, K* 2300 g/100 inch and 600 g
- L* 700 g
- R* 900 g/m and 700 g, S* 2300 g/100 inch and 700 g
- T* 800 g
Materialwetted parts:
- process connection and extension tube: 1.4435/316L or 2.4610/Alloy C4
- vibration fork: 1.4435/316L or 2.4610/Alloy C4
- flat seal for process connection G2* or G3*: elastomer fibre, asbestos-free
- polyester housing: PBT-FR with PBT-FR cover or with PA12 cover with sight glass, cover seal: EPDM
- stainless steel housing: 1.4435/316L, cover seal: silicone
- aluminum housing: EN-AC-AlSi10Mg, plastic-coated, cover seal: EPDM
- compact housing with valve connector or M12 connector: 1.4435/316L
cable gland: polyamide or brass, nickel-plated
temperature spacer: 1.4435/316L
flameproof bushing: 1.4435/316L
Surface qualityRa < 3.2 µm/80 grit: length, spacer, bushings *A, *B, *E
Switching pointsee section switch point
Process connection- cylindrical thread G3/4A, G1A to DIN ISO 228/1 with flat seal to DIN 7603
- conical thread R3/4, R1 to DIN 2999, part 1
- conical thread 3/4NPT, 1NPT to ANSI B 1.20.1
- flush-mounted with welding sleeve to factory standard (G3/4A, G1A)
- flush-mounted with welding neck to factory standard (1 inch), sensor can be positioned
- Triclamp 1-1/2 inch, 2 inch to ISO 2852
- flanges to EN 1092-1 from DN25, to ANSI B 16.5 from 1 inch, to JIS B 2238 (RF) from DN25
For further information see type code.
Indication and operation
Display elementselectronic inserts:
- electronic inserts FEL50 A (PA), FEL58 (N2): green LED, yellow LED
- electronic inserts FEL51 (AC), FEL52 (E5), FEL54 (WA), FEL55 (SI), FEL56 (N1): green LED, red LED
compact housings:
compact housing with valve connector
- electronic version FEL51 (AC), FEL52 (E5): green LED, red LED
- electronic version FEL58 (N2): green LED, yellow LED
compact housing with M12 x 1 round connector without LEDs
- electronic version FEL52 (E5): green LED, yellow LED, red LED
- electronic version FEL58 (N2): green LED, yellow LED
compact housing with M12 x 1 round connector with LEDs
- electronic version FEL52 (E5): green LED, two yellow LEDs
Control elementselectronic insert FEL50A (PA): 8 switches for device address setting
electronic inserts FEL51 (AC), FEL52 (E5), FEL54 (WA), FEL55 (SI), FEL56 (N1): two switches for fail-safe mode and density change
electronic insert FEL58 (N2): two switches for fail-safe mode and density change and one test button interrupts lead
Function testcompact housing: function test with test magnet
electronic versions FEL51 (AC), FEL52 (E5) and FEL58 (N2): During the test, the current state of the electronic switch is reversed.
Certificates and approvals
Explosion-hazardous areaKEMA 01 ATEX 1089, KEMA 01 ATEX 1147 X, KEMA 01 ATEX 2117 , for additional certificates see
Type of protectionEx-Hexagon II 1/2G EEx ia IIC T3 ... T6 or EEx ia IIB T3 ... T6 and Ex-Hexagon II 1/2D T80°C (KEMA 01 ATEX 1089)
Ex-Hexagon II 1G EEx ia IIC T3 ... T6 or EEx ia IIB T3 ... T6 (KEMA 01 ATEX 1147 X)
Ex-Hexagon II 1/2G EEx d IIC T3 ... T6 or EEx d IIB T3 ... T6 (KEMA 01 ATEX 2117)
Ex-Hexagon II 3G EEx nA/nC II T6 and Ex-Hexagon II 3D T85°C
SIL classificationup to SIL2 acc. to IEC 61508
Overspill protectionZ-65.11-306 (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)
If the fork tines are joined together on account of build-up, the useful signal is attenuated to such an extent that the original EMC values can no longer be completely observed (EN 61000-4-3 electromagnetic fields,
EN 61000-4-6 HF coupling).
Directive 94/9/EC (ATEX)EN 50014, EN 50018, EN 500020, EN 500021, EN 50284, EN 50281-1-1
Electromagnetic compatibilityNE 21
Degree of protectionEN 60529
Climate classEN 60068, part 2-38, fig. 2a
Vibration resistanceEN 60068-2-6 , 10 ... 50 Hz, 0.15 mm, 100 cycles
Supplementary documentationtechnical information TI328O
operating instructions KA143O (LVL-M*)
operating instructions KA220O (LVL-M** with compact housing)
operating instructions BA141O (electronic insert FEL50A (PA))
operating instructions KA140O weld-in socket G1 (LVL-Z102)
operating instructions KA141O weld-in adapter G1 (LVL-Z101)
operating instructions KA142O weld-in adapter G¾ (LVL-Z100)
operating instructions KA151O sliding sleeve for unpressurised operation G1A, 1 NPT (LVL-Z120, LVL-Z122)
operating instructions KA152O sliding sleeve for unpressurised operation G1½A, 1½ NPT (LVL-Z121, LVL-Z123)
operating instructions KA153O high pressure sliding sleeve G1A, 1 NPT (LVL-Z124, LVL-Z125, LVL-Z128, LVL-Z129)
operating instructions KA154O high pressure sliding sleeve G1A, 1 NPT (LVL-Z126, LVL-Z127, LVL-Z130, LVL-Z131)
safety information SI031O (KEMA 01 ATEX 2117)
safety information SI063O (KEMA 01 ATEX 1089)
safety information SI064O (KEMA 01 ATEX 1147 X)
safety information SI154O (KEMA 01 ATEX 1089), PROFIBUS PA version
safety information SI159O (KEMA 01 ATEX 11147 X), PROFIBUS PA version
safety information SI182O (Ex-Hexagon II 3G EEx nA/nC II T6 and Ex-Hexagon II 3D T85°C)
approval ZE233O overspill protection acc. to WHG (Z-65.11-306)
FM installation drawing ZD041O
CSA control drawing ZD042O
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 11.027200518
ECLASS 10.0.127200518
ECLASS 9.027200589
ECLASS 8.027200589
ECLASS 5.127200589
ETIM 8.0EC001447
ETIM 7.0EC001447
ETIM 6.0EC001447
ETIM 5.0EC001447
UNSPSC 12.141111950

Documents: LVL-M*

ManualsLanguageFile TypeFile Size
KA143O, brief instructions LVL-M* / KA143O, Kurzanleitung LVL-M*ALLPDF1425 KB
KA220O, brief instructions LVLM*H Compact housing / KA220O, Kurzanleitung LVLM*H KompaktgehäuseALLPDF1111 KB
BA141O, Manual Electronic insert FEL50 A (PA)ENGPDF680 KB
BA141O, Handbuch Elektronikeinsatz FEL50 A (PA)GERPDF698 KB
Instruction manuals
Instruction Manual Weld-in socket / Betriebsanleitung EinschweißmuffeALLPDF113 KB
Instruction manual LVL-M** PROFIBUS PA / Betriebsanleitung LVL-M** PROFIBUS PAALLPDF348 KB
Instruction manual LVL-M** PROFIBUS PA / Betriebsanleitung LVL-M** PROFIBUS PAALLPDF391 KB
Operating instructions KA 141O, Weld-in adapter G1A (Z101) / Betriebsanleitung KA 141O, Einschweißadapter G1A (Z101)ALLPDF113 KB
Operating instructions KA 142O, Weld-in socket G¾A (Z100) / Betriebsanleitung KA 142O, Einschweißmuffe G¾A (Z100)ALLPDF121 KB
Operating instructions KA 152O, Sliding sleeve G1½A (Z121), 1½ NPT (Z123) / Betriebsanleitung KA 152O, Schiebemuffe G1½A (Z121), 1½ NPT ( Z123)ALLPDF413 KB
Operating instructions KA153O, High pressure sliding sleeve G1A (Z124, Z125), 1 NPT (Z128, Z129) / Betriebsanleitung KA153O, Hochdruck-Schiebemuffe G1A (Z124, Z125), 1 NPT (Z128, Z129)ALLPDF753 KB
Operating instructions KA154O, High pressure sliding sleeve G1½A (Z126, Z127), 1½ NPT (Z130, Z131) / Betriebsanleitung KA154O, Hochdruck-Schiebemuffe G1½A (Z126, Z127), 1½ NPT (Z130, Z131)ALLPDF747 KB
Operating instuctions KA 151O, Sliding sleeve G1 (LVL-Z120), 1 NPT (LVL-Z122) / Betriebsanleitung KA 151O, Schiebemuffe G1 (LVL-Z120), 1 NPT (LVL-Z122)ALLPDF416 KB
Control drawing CSA, LVL-M*(H)ENGPDF656 KB
Installation drawing FM, LVL-M*(H)ENGPDF120 KB
SI00031O, Instruction manual LVL-M**ENGPDF376 KB
SI00063O, Instruction manual LVL-M** NAMURENGPDF460 KB
SI00064O, Instruction manual LVL-M** NAMURENGPDF404 KB
SI00182O, Instruction manual LVL-MXXENGPDF983 KB
SI00031O, Instruction manual LVL-M**FRAPDF379 KB
SI00063O, Instruction manual LVL-M** NAMURFRAPDF464 KB
SI00064O, Instruction manual LVL-M** NAMURFRAPDF390 KB
SI00182O, Instruction manual LVL-MXXFRAPDF980 KB
SI00031O, Betriebsanleitung LVL-M**GERPDF378 KB
SI00063O, Betriebsanleitung LVL-M** NAMURGERPDF462 KB
SI00064O, Betriebsanleitung LVL-M** NAMURGERPDF389 KB
SI00182O, Betriebsanleitung LVL-MXXGERPDF988 KB
ZE00233, Zulassung WHG Z-65.11-306, LVL-M**GERPDF1030 KB
Technical information
Declaration of Contamination / Erklärung zur KontaminationALLPDF137 KB
TI328O, Technical information LVL-M*ENGPDF1102 KB
TI328O, Technische Information LVL-M*GERPDF1104 KB

Approvals+Certificates: LVL-M*

CertificatesCertificate No.File TypeFile Size
Canada CSACoC 212978PDF251 KB
Europe DEKRA ATEX Ex dDEKRA 17 ATEX 0021PDF4207 KB
Europe KEMA ATEX Category 1 GKEMA 01 ATEX 1147XPDF520 KB
Europe KEMA ATEX Category 1/2 D ATEX Category 1/2 GKEMA 01 ATEX 1089PDF2448 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL58PDF46 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL56PDF43 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL55PDF43 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL54PDF50 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL51PDF48 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL52PDF44 KB

Software: LVL-M*

DriversRelease InfoFile TypeFile Size

Associated Products: LVL-M*

Device DTM, For level devices, Frame application, like e. g. PACTware, must be installed separatelypa
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