Serviceline Industrial Sensors
Serviceline Explosion Protection

Inductive sensor NBN3-F31K2M-E8-B23-S-3G-3D

  • Direct mounting on standard actuators
  • ATEX/IECEx Zone 2/22
  • Rugged metal base
  • Weatherproof housing for outdoor applications
  • Plug-in terminals
  • 1/2" NPT conduit entrance

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  NBN3-F31K2M-E8-B23-S-3G-3D

General specifications
Switching function2 x normally open (NO)
Output typePNP
Rated operating distance2.5 mm
Installationfor non-flush mounting
Output polarityDC
Assured operating distance0 ... 2.05 mm
Output type4-wire
Nominal ratings
Operating voltage10 ... 30 V
Switching frequency0 ... 100 Hz
Hysteresistyp. 5 %
Reverse polarity protectionall connections
Short-circuit protectionpulsing
Voltage drop≤ 3 V
Operating current0 ... 100 mA
Off-state current0 ... 0.5 mA typ. 0.1 µA
No-load supply current≤ 25 mA
Functional safety related parameters
MTTFd490 a
Mission Time (TM)20 a
Diagnostic Coverage (DC)0 %
Valve circuit
Voltagemax. 32 V DC
Currentmax. 240 mA
Short-circuit protectionno
Reverse polarity protectionyes, with reversed output LED is out of function, therfore more power for solenoid valve
Compliance with standards and directives
Standard conformity
StandardsEN IEC 60947-5-2
Approvals and certificates
IECEx approval
Equipment protection level GcIECEx TUR 20.0062X
Equipment protection level DcIECEx TUR 20.0068X
ATEX approval
Equipment protection level GcTÜV 20 ATEX 8592 X
Equipment protection level DcTÜV 20 ATEX 8598 X
Ambient conditions
Ambient temperature-40 ... 75 °C (-40 ... 167 °F) , restriction for use in hazardous area, see instruction manual
Storage temperature-40 ... 85 °C (-40 ... 185 °F)
Mechanical specifications
Connection typescrew terminals
Connection (system side)1/2" NPT cable gland , ground connection with earthing screw only for wire cross-section 4 mm2, use solid wire or stranded wire with wire end ferrule
Connection (valve side)screw terminal ,
Cable gland 1/2" NPT
Housing materialPC (glass-fiber-reinforced Makrolon)
Housing basepowder coated aluminum
Degree of protectionIP67 ; additional degree of protection IP66/IP69 with BT65-F31K2-RG-EN-01 and SH-F31K2-B13
Terminal assembly
Connection typeFor connection of copper wires with 7 mm dismantle length
Tightening torque 0.5 ... 0.6 Nm
TypeScrew terminal block, pluggable
Terminal capacityConductor cross-section 0,25 ... 2,5 mm2 , flexible/rigid
For Multiple-wire connection: two wires of equal cross-section per 0.25 ... 1 mm2
Tightening torque, fastening screws4 Nm ... 5 Nm
Tightening torque, housing screws1.5 Nm
Tightening torque of cover srews1.5 Nm
Tightening torque, earthing screw1.5 Nm
Tightening torque, cable glandmax. 4 Nm
Tightening torque, stopping plug2 Nm
Height53 mm
Width100 mm
Length106 mm
General information
Use in the hazardous areasee instruction manuals


ECLASS 13.027273901
ECLASS 12.027273901
ECLASS 11.027220501
ECLASS 10.0.127220501
ECLASS 9.027220501
ECLASS 8.027220501
ECLASS 5.127220501
ETIM 9.0EC002714
ETIM 8.0EC002714
ETIM 7.0EC002714
ETIM 6.0EC002714
ETIM 5.0EC002714
UNSPSC 12.139121550

Details: NBN3-F31K2M-E8-B23-S-3G-3D

Product Documentation: NBN3-F31K2M-E8-B23-S-3G-3D

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF178 KB

Design / Simulation: NBN3-F31K2M-E8-B23-S-3G-3D

Language Selection:
CADLanguageFile TypeFile Size
CAD Portal / CAD PortalALLLINK---
CAE EPLAN Data Portal / CAE EPLAN Data PortalALLLINK---

Approvals: NBN3-F31K2M-E8-B23-S-3G-3D

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Brasil BR TUV Rheinland Brazil Ex ecTÜV 22.0564 XALLPDF478 KB
Brasil BR TUV Rheinland Brazil Ex tcTÜV 22.0565 XALLPDF459 KB
Europe TUV Rheinland ATEX ec 3GTÜV 20 ATEX 8592 XALLPDF147 KB
Europe TUV Rheinland ATEX tc 3DTÜV 20 ATEX 8598 XALLPDF151 KB
Worldwide TUV Rheinland IECEx ecIECEx TUR 20.0062XALLLINK---
Worldwide TUV Rheinland IECEx tcIECEx TUR 20.0068XALLLINK---
Declaration of Conformity
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-5278ALLPDF1233 KB
UK Declaration of Conformity (P+F)TDOC-6501_ENGENGPDF1238 KB

Associated Products: NBN3-F31K2M-E8-B23-S-3G-3D




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