Serviceline Industrial Sensors
Serviceline Explosion Protection

Inductive sensor NBN3-F31K2M-Z8L-B13-S-3G-3D

  • Direct mounting on standard actuators
  • ATEX-approval for zone 2 and zone 22
  • Compatible with all process control systems
  • 2-wire DC sensor with minimum off-state current
  • Rugged metal base
  • Weatherproof housing for outdoor applications
  • Plug-in terminals

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, also apply to Pepperl+Fuchs AG.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  NBN3-F31K2M-Z8L-B13-S-3G-3D

General specifications
Switching function2 x normally open (NO)
Output typeTwo-wire
Rated operating distance2.5 mm
Installationfor non-flush mounting
Output polarityDC
Assured operating distance0 ... 2.05 mm
Output type2x 2-wire
Nominal ratings
Operating voltage6 ... 30 V
Switching frequency0 ... 100 Hz
Hysteresistyp. 0.5 mm
Reverse polarity protectionreverse polarity tolerant
Short-circuit protectionno
Voltage drop≤ 6 V
Operating current4 ... 100 mA
Off-state current100 ... 200 µA typ. 160 µA
Functional safety related parameters
MTTFd684 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 60947-5-2:2007
EN 60947-5-2/A1:2012
IEC 60947-5-2:2007
IEC 60947-5-2 AMD 1:2012
VDI / VDE 3845
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 (system side)M20 x 1.5 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 M20 x 1.5
Housing materialrugged polycarbonate (PC) + GF 10% , optimised for outdoor use
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 screws2 Nm
Tightening torque, housing screws1.5 Nm
Tightening torque, earthing screw1.5 Nm
Tightening torque, cable glandmax. 4 Nm
Tightening torque, stopping plug2 Nm
Equipment protection level Gc (nA)
CertificatePF 15CERT3754 X
CE marking[*PD-Z02586A*]
ATEX markingEx-Hexagon II 3G Ex nA IIC T6...T1 Gc
The Ex-related marking can also be printed on the enclosed label.
StandardsEN 60079-0:2012+A11:2013, EN 60079-15:2010
Ignition protection category "n"
Use is restricted to the following stated conditions
Special conditions
Maximum operating current ILThe maximum permissible load current must be restricted to the values given in the following list. High load currents and load short-circuits are not permitted.
Maximum operating voltage UBmaxThe maximum permissible operating voltage UB max is restricted to the values in the following list. Tolerances are not permissible.
Maximum permissible ambient temperature TUmaxDepending on the load current IL, the maximum operating voltage UBmax, and the temperature class.
Details can be found in the following list.
at UBmax=30 V, IL=100 mA, T635 °C (95 °F)
at UBmax=30 V, IL=100 mA, T1 ... T557 °C (134.6 °F)
at UBmax=30 V, IL=50 mA, T635 °C (95 °F)
at UBmax=30 V, IL=50 mA, T1 ... T560 °C (140 °F)
Maximum values of the valve circuitUV = 32 V; IV = 240 mA
Equipment protection level Dc (tc)
CE marking[*PD-Z02586A*]
ATEX markingEx-Hexagon II 3D Ex tc IIIC T80°C Dc
The Ex-related marking can also be printed on the enclosed label.
StandardsEN 60079-0:2012+A11:2013, EN 60079-31:2014
Protection by enclosure "tc" Some of the information in this instruction manual is more specific than the information provided in the datasheet.
GeneralThe corresponding datasheets, declarations of conformity, EU type examination certificates, certificates, and control drawings, where applicable (see datasheets), form an integral part of this document. These documents are available at The maximum surface temperature of the device was determined without a layer of dust on the apparatus. Some of the information in this instruction manual is more specific than the information provided in the datasheet.
Special conditions
Maximum permissible ambient temperature TUmaxdependant of the load current IL and the max. operating voltage UBmax
Information can be taken from the following list.
at UBmax=30 V, IL=100 mA57 °C (134.6 °F)
at UBmax=30 V, IL=50 mA60 °C (140 °F)
General information
Use in the hazardous areasee instruction manuals
Category3G; 3D

Documents: NBN3-F31K2M-Z8L-B13-S-3G-3D

Instruction manualsLanguageFile TypeFile Size
Instruction manualENGPDF63 KB
Manuel d'instructionsFRAPDF65 KB
BetriebsanleitungGERPDF64 KB
Manuale di istruzioniITAPDF61 KB
Manual de instruccionesSPAPDF64 KB
Application report - Salty Surroundings, Powerful SensorENGPDF1043 KB
Applikationsbericht - Salzige Umgebung, starker SensorGERPDF1050 KB

CAD+CAE: NBN3-F31K2M-Z8L-B13-S-3G-3D

CADFile TypeFile Size
3-D model in IGS format / 3-D-Modell im IGS-FormatIGS15247 KB
3-D model in STP format / 3-D-Modell im STP-FormatSTP5954 KB
CAD Portal / CAD PortalLINK---

Approvals+Certificates: NBN3-F31K2M-Z8L-B13-S-3G-3D

CertificatesCertificate No.File TypeFile Size
Europe Pepperl+Fuchs ATEX Category 3 D CertificatePF15CERT3774XPDF1001 KB
Europe Pepperl+Fuchs ATEX Category 3 G CertificatePF15CERT3754XPDF1015 KB

Associated Products: NBN3-F31K2M-Z8L-B13-S-3G-3D