Serviceline Industrial Sensors
Serviceline Explosion Protection

Magnetic Immersion Probe for Limit Value Detection LML-Ex

  • Sensor for limit value detection in liquids
  • Media contacting parts of stainless steel
  • Mounting without removing the float
  • Approved for zone 0

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  LML-Ex

General specifications
Function principlering magnet as switching element in the float, reed contact
number of contacts:
- version LML1: 1 contact
- version LML2: 2 contacts
- version LML3: 3 contacts
switching function:
- version DO: with rising level NC contact
- version DS: with rising leve NO contact
- version DW: with rising level change-over contact
Equipment architectureA measuring system consists of a magnet-operated immersion probe LML*S*-**S-**-Ex and a (up to 3) isolated amplifier(s) with certified intrinsically safe circuit, for example KFD2-SR2-Ex1.W.
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61000-6-2:2006 , EN 61000-6-4:2011
Degree of protectionIEC 60529:2000
Operating conditions
Installation conditions
Switching pointposition according to specification
Process conditions
Process temperature-30 ... 150 °C (-22 ... 302 °F)
Process pressure (static pressure)≤ 25 bar (362.6 psi)
Densityversion S2: ≥ 0.8 g/cm3
version S3: ≥ 0.7 g/cm3
Ambient conditions
Ambient temperatureterminal box: -50 ... 60 °C (-58 ... 140 °F)
Mechanical specifications
Degree of protectionIP66 / IP68
Connectionterminal box, 6 terminals , max. 2.5 mm2
Materialfloat, guide tube, process connection: stainless steel 1.4571/316Ti
terminal box: aluminum die-casting
- version S2: cylinder ∅44 mm x 52 mm
- version S3: ball ∅52 mm
guide tube: ∅12 mm, max. length 3000 mm
terminal box: 80 x 75 x 57 mm
Process connectionthread G1-1/2A, G2A to DIN/ISO 228/1
Data for application in connection with hazardous areas
EU-type examination certificateKEMA 03 ATEX 1496 X
MarkingEx-Hexagon II 1/2G EEx ia IIC T3...T6
Voltage36 V
Current100 mA
Internal capacitance0 nF
Internal inductance0 µH
Directive conformity
Directive 2014/34/EUEN 60079-0:2012, EN 60079-11:2012, EN 60079-26:2007
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see
Designation- LML-Z11 set collar, 1.4571/316Ti
- LML-FS2 float, cylinder, Ø44 mm x 52 mm, 1.4571/316Ti
- LML-FS3 float, ball, Ø52 mm, 1.4571/316Ti


ECLASS 13.027200502
ECLASS 12.027200502
ECLASS 11.027200502
ECLASS 10.0.127200502
ECLASS 9.027200502
ECLASS 8.027200502
ECLASS 5.127200502
ETIM 9.0EC001447
ETIM 8.0EC001447
ETIM 7.0EC001447
ETIM 6.0EC001447
ETIM 5.0EC001447
UNSPSC 12.141111950

Details: LML-Ex


The device is a sensor for limit value detection in liquids.

A ring magnet integrated in the float activates the contacts inside the probe tube via its magnetic field. If the probe strays outside the range of the mechanical contact, it reverts to the output status.

The skipping of switching points caused by abrupt level changes can be avoided using snap-on set collars on the probe tube. The same set collars are also used for latching contact operation.

Product Documentation: LML-Ex

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF145 KB
ManualENGPDF2114 KB

Approvals: LML-Ex

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Europe KEMA ATEX Category 1/2 GKEMA 03 ATEX 1496XALLPDF2528 KB
Declaration of Conformity
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-2128CALLPDF239 KB
Contamination Declaration
Contamination declaration / Kontaminationserklärung   ALLPDF137 KB