Serviceline Industrial Sensors
Serviceline Explosion Protection

Inductive sensor NCN3-F31K-N4

  • Direct mounting on standard actuators
  • Fixed setting
  • EC-Type Examination Certificate TÜV99 ATEX 1479X
  • Usable up to SIL 2 acc. to IEC 61508

NAMUR sensors must be operated with approved switch amplifiers. Please find suitable devices below:

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  NCN3-F31K-N4

General specifications
Switching function2 x normally closed (NC)
Output typeNAMUR
Rated operating distance3 mm
Installationflush mountable
Assured operating distance0 ... 2.4 mm
Actual operating distance2.7 ... 3.3 mm typ.
Actuating elementStainless steel 1.4305 / AISI 303
8.5 mm x 8.5 mm x 0.5 mm
Reduction factor rAl 0.5
Reduction factor rCu 0.4
Reduction factor r304 1
Reduction factor rSt37 1.3
Reduction factor rBrass 0.6
Output type2-wire
Nominal ratings
Nominal voltage8.2 V (Ri approx. 1 kΩ)
Switching frequency0 ... 3 kHz
Hysteresistyp. 5 %
Reverse polarity protectionreverse polarity protected
Short-circuit protectionyes
Suitable for 2:1 technologyyes , Reverse polarity protection diode not required
Current consumption
Measuring plate not detected≥ 3 mA
Measuring plate detected≤ 1 mA
Time delay before availability≤ 1.1 ms
Switching state indicatorLED, yellow
Functional safety related parameters
Safety Integrity Level (SIL)SIL 2
MTTFd1470 a
Mission Time (TM)20 a
Diagnostic Coverage (DC)0 %
Compliance with standards and directives
Standard conformity
NAMUREN 60947-5-6:2000
IEC 60947-5-6:1999
Electromagnetic compatibilityNE 21:2007
StandardsEN 60947-5-2:2007
EN 60947-5-2/A1:2012
IEC 60947-5-2:2007
IEC 60947-5-2 AMD 1:2012
Approvals and certificates
IECEx approval
Equipment protection level GaIECEx TUN 17.0021X
Equipment protection level GbIECEx TUN 17.0021X
Equipment protection level DaIECEx TUN 17.0021X
Equipment protection level MbIECEx TUN 17.0021X
ATEX approval
Equipment protection level GaTÜV 99 ATEX 1479 X
Equipment protection level GbTÜV 99 ATEX 1479 X
Equipment protection level Gc (ic)PF13CERT2895 X
Equipment protection level DaTÜV 99 ATEX 1479 X
EAC conformityTR CU 020/2011
UL approvalcULus Listed, General Purpose
Ordinary LocationE87056
Hazardous LocationE501628
Control drawing116-0456
CSA approvalcCSAus Listed, General Purpose
CCC approval
Hazardous Location2020322315002262
NEPSI approval
NEPSI certificateGYJ19.1410X
Ambient conditions
Ambient temperature-25 ... 100 °C (-13 ... 212 °F)
Storage temperature-40 ... 100 °C (-40 ... 212 °F)
Mechanical specifications
Connection (system side)Cage tension spring terminals
Stripped length 7 mm
M20 x 1.5 cable gland
usable thread length 11.5 mm
screw-in depth max. 11.5 mm
Core cross-section (system side)Flexible: 0.2 ... 1.5 mm2
rigid: 0.2 ... 2.5 mm2
Housing materialPBT
Sensing facePBT
Degree of protectionIP67
Tightening torque, housing screws1 Nm
Tightening torque, cable glandM20 x 1.5 ; max. 7 Nm
General information
Use in the hazardous areasee instruction manuals

Documents: NCN3-F31K-N4

Instruction manualsLanguageFile TypeFile Size
ИнструкцииBULPDF184 KB
Návod k poużitíCZEPDF176 KB
Instruktions manualDANPDF174 KB
Instruction manualENGPDF176 KB
KasutusjuhendESTPDF168 KB
KäyttöohjeFINPDF168 KB
Manuel d'instructionsFRAPDF178 KB
BetriebsanleitungGERPDF176 KB
Οδηγίες χρήσηςGREPDF186 KB
HandleidingHOLPDF175 KB
Instruction manual / BetriebsanleitungHRVPDF173 KB
Használati útmutatóHUNPDF178 KB
Manuale di istruzioniITAPDF177 KB
Lietošanas pamācībaLAVPDF173 KB
Instrukciju vadovasLITPDF176 KB
Instrukcja obsługiPOLPDF177 KB
Manual de instruçõesPORPDF178 KB
Manual de utilizareRONPDF179 KB
Návod na poużitieSLKPDF177 KB
Navodila za uporaboSLVPDF173 KB
Manual de instruccionesSPAPDF240 KB
ManualSWEPDF172 KB

Approvals+Certificates: NCN3-F31K-N4

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-1176BPDF248 KB
Canada USA CSA Ordinary Location1007121PDF99 KB
Canada USA UL Hazardous LocationE501628:1:6PDF573 KB
Canada USA UL Ordinary Location20190220-E87056PDF403 KB
China NEPSIGYJ19.1410XPDF2028 KB
China SITIIAS CCC Ex Certificate2020322315002262 (Pepperl+Fuchs Manufacturing s.r.o)PDF1916 KB
EU Pepperl+Fuchs Certificate Ex ic ATEX Category 3 GPF13CERT2895XPDF123 KB
EU TUV Nord ATEX ia 2G, 1G, 1D s. certificateTÜV 99 ATEX 1479 XPDF5439 KB
Russia NANIO "CCVE"TC RU C-DE.AA87.B.00394PDF3971 KB
Worldwide Pepperl+Fuchs Functional Safety CertificatePF12CERT2382EPDF1448 KB
Worldwide TUV Nord IECEx iaIECEx TUN 17.0021XLINK---
Control drawings
Control drawing UL / Control drawing UL   PDF378 KB

Associated Products: NCN3-F31K-N4

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