Serviceline Industrial Sensors
Serviceline Explosion Protection

Vibration Limit Switch LVL-M1H

  • Limit switch in hygienic version 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
  • Process connections acc. to EHEDG
  • Up to SIL 2 acc. to IEC/EN 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-M1H

General specifications
Function principlelimit detection
Maximum or minimum detection in tanks or pipelines containing all types of liquids including use in explosion hazardous areas. Particularly suited to very aggressive liquids thanks to high degree of corrosion protection.
Measuring methodThe 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.
Construction typecompact device
hygienic version
SeriesVibracon LVL-M1
Functional safety related parameters
Safety Integrity Level (SIL)SIL 2
Rated 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)
Current consumptionelectronic insert FEL52 (E5): max. 15 mA
Power consumptionelectronic insert FEL52 (E5): max. 0.83 W
electronic insert FEL54 (WA): max. 1.3 W
Electrical specifications
Surge protectionelectronic insert FEL51 (AC), electronic insert FEL52 (E5), electronic insert FEL54 (WA), electronic insert FEL55 (SI): overvoltage category III
Switching pointsee section switch point
Measured variablelimit level (limit value)
Measurement rangedepends on mounting point and pipe extension up to 3000 mm , larger sizes on request
Switching delaywhen 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 behaviourswitch-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
When switching on the power supply the output assumes the alarm signal. After max. 2 s it assumes the correct switching mode.
Directive conformity
Electromagnetic compatibility
Directive 89/336/EECEN 61326
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).
Low voltage
Directive 73/23/EECEN 61010-1
Electromagnetic compatibilityNE 21
Degree of protectionIEC 60529
Vibration resistanceEN 60068-2-6
Climate classDIN EN 60068-2-38/IEC 68-2-38
Input characteristics
Medium densityadjustment on the electronic insert > 0,5 g/cm3 or > 0,7 g/cm3 (other on request)
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 positionany position
Process conditions
Medium temperature-50 ... 150 °C (-58 ... 302 °F) , 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 contents< ∅5 mm
Ambient conditions
Ambient temperature-50 ... 70 °C (-58 ... 158 °F) , function with reduced data values
see section ambient temperature
Storage temperature-50 ... 80 °C (-58 ... 176 °F)
Vibration resistance10 ... 50 Hz, 0.15 mm, 100 cycles
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)
Connectionelectronic 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
Materialwetted parts:
- process connection: 1.4435/316L
- vibration fork: 1.4435/316L
- 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 < 1.5 µm/120 grit: length, spacer, bushings *C
Ra < 0.3 µm/320 grit: length, spacer, bushings *D
Mass700 g , basic weight: compact sensor, electronic insert, stainless steel housing, process connection G2*, additional weight is dependent on extension tube, housing and process connection
process connections:
- A31 1000 g, A41 1200 g, A51 1500 g, A6* 2400 g, A81 4900 g, A91 7000 g
- C45 1400 g, C51 1200 g, C71 1600 g, C75 3200 g, C95 5900 g, CA3 5600 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,
F81 2400 g, F85 4300 g, F93 4800 g, F95 5900 g, FA3 5600 g, FA5 7500 g
- G3E 200 g
- J13 no information, J16 no information, J17 1700 g, J19 no information, J1A no information, J1C 1700 g
- R*R no information
- S13 300 g, S61 200 g, SV1 no information
- T51 no information, T61 100 g
temperature spacer, flameproof bushing:
- I* 600 g, Q* 700 g
Dimensionshousing: diameter max. 85 mm, height max. 173 mm
temperature separator, flameproof bushing: additional length L 140 mm
process connection: length L 55.5 ... 80 mm
extension: any length L from 148 ... 3000 mm, larger sizes on request
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
Process connection- cylindrical thread G3/4A, G1A to DIN ISO 228/1 with flat seal to DIN 7603
- 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
- threaded pipe joint DN32, DN40, DN50 to DIN 1185
- aseptic connection DN50 to DIN 11864-1 form A for pipe DIN 11850
- SMS connection 2 inch (DN51)
- DRD flange, 65 mm
- Varivent® DN50 (50/40) to factory standard Tuchenhagen
- 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.
Data for application in connection with hazardous areas
EU-type examination certificatesee instruction manuals (SI)
International approvals
FM approvalsee control drawings (ZD)
CSA approvalsee control drawings (ZD)
IECEx approvalsee instruction manuals (SI)
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
Overspill protectionsee approval (ZE)
General information
Supplementary documentationtechnical information (TI)
manuals, brief instructions (BA, KA)
instruction manuals (SI)
control drawings (ZD)
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see


ECLASS 13.027200518
ECLASS 12.027200518
ECLASS 11.027200518
ECLASS 10.0.127200518
ECLASS 9.027200589
ECLASS 8.027200589
ECLASS 5.127200589
ETIM 9.0EC001447
ETIM 8.0EC001447
ETIM 7.0EC001447
ETIM 6.0EC001447
ETIM 5.0EC001447
UNSPSC 12.141111950

Details: LVL-M1H


The device is a limit switch for use in all liquids

  • for temperature from -50 °C to +150 °C

  • for pressures up to 64 bar

  • for viscosities up to 10000 mm 2/s

  • for densities up to 0.5 g/cm 3 or 0.7 g/cm 3 (other settings available on request)

The function is not affected by flow, turbulence, bubbles, foam, vibration, bulk solids content or build-up, the device is thus the ideal replacement for float switches.

The compact version is ideal for mounting in pipes.

With polished fork and easy-to-clean process connections and housings is the level limit switch usable for food and pharmaceutical applications.

Devices with protection Ex ia and Ex d are available for use in explosion hazardous areas.

Product Documentation: LVL-M1H

Language Selection:
Product informationLanguageFile TypeFile Size
TI328O, Technical information LVL-M*ENGPDF1102 KB
Brief Instructions
KA00219O, brief instructions Weld-in socket G¾ (Z66) / KA00219O, Kurzanleitung Einschweißmuffe G¾ (Z66)ALLPDF155 KB
KA144O, brief instructions LVL-M*(H) / KA144O, Kurzanleitung LVL-M*(H)ALLPDF1347 KB
KA220O, brief instructions LVLM*H Compact housing / KA220O, Kurzanleitung LVLM*H KompaktgehäuseALLPDF1111 KB
Instruction Manual Weld-in socket / Betriebsanleitung EinschweißmuffeALLPDF113 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
Safety and Security Documentation
SI00063O, Instruction manual LVL-M** NAMURENGPDF460 KB
SI00064O, Instruction manual LVL-M** NAMURENGPDF404 KB
SI00031O, Instruction manual LVL-M**ENGPDF376 KB
SI00182O, Instruction manual LVL-MXXENGPDF983 KB
BA141O, Manual Electronic insert FEL50 A (PA)ENGPDF680 KB

Approvals: LVL-M1H

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Canada CSACoC 212978ALLPDF251 KB
DEKRA Ex ib IECEx Certificate of Conformity Ex iaIECEx DEK 16.0077XALLLINK---
DEKRA IECEx Certificate of Conformity Ex dIECEx DEK 17.0006ALLLINK---
Europe DIBT WHG Overspill Protection (mechanical)Z-65.11-306ALLPDF488 KB
Europe KEMA ATEX Category 1 GKEMA 01 ATEX 1147XALLPDF520 KB
Europe KEMA ATEX Category 1/2 D ATEX Category 1/2 GKEMA 01 ATEX 1089ALLPDF2448 KB
Europe Pepperl+Fuchs ATEX Category 3PF18CERT4471ALLPDF294 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL55ALLPDF43 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL56ALLPDF43 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL51ALLPDF48 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL54ALLPDF50 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL52ALLPDF44 KB
Pepperl+Fuchs Declaration of Conformity Functional SafetyP+F SIL DoC - LVL-M FEL58ALLPDF46 KB
Control Drawings
Layout Drawings   ENGPDF656 KB
Layout Drawings   ENGPDF120 KB
Declaration of Conformity
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-2198BALLPDF234 KB
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-3917ALLPDF244 KB
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-3822AALLPDF240 KB
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-2215DALLPDF269 KB
Contamination Declaration
Contamination declaration / Kontaminationserklärung   ALLPDF137 KB

Software: LVL-M1H

Language Selection:
Device Description Files/DriversRelease InfoFile TypeFile Size

Associated Products: LVL-M1H

Universal DTM host platform, For all DTMs of Pepperl+Fuchs, Approved FDT/DTM technology, Free of charge, Download from Pepperl+Fuchs websitepa
Device DTM, For level devices, Frame application, like e. g. PACTware, must be installed separatelypa
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