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NBB20-U1K-N0 – Inductive Sensor – PEPPERL+FUCHS Proximity Sensors

USD $ 46.83


PEPPERL+FUCHS Inductive proximity sensors are the preferred choice for the majority of applications requiring accurate, non-contact detection of metallic objects in machinery or automation equipment. As a pioneer and market leader, Pepperl+Fuchs offers innovative, high quality inductive sensors to meet the needs of the worldwide automation and process control markets. Our experience, flexibility and customer focus continues to allow us to offer custom designed solutions for the most unique and demanding applications.

General specifications
Switching function Normally closed (NC)
Output type NAMUR
Rated operating distance 20 mm
Installation flush
Assured operating distance 0 … 16.2 mm
Actual operating distance 18 … 22 mm
Reduction factor rAl 0.37
Reduction factor rCu 0.35
Reduction factor r304 0.79
Output type 2-wire
Nominal ratings
Nominal voltage 8.2 V (Ri approx. 1 kΩ)
Switching frequency 0 … 250 Hz
Hysteresis 1 … 15 typ. 5 %
Reverse polarity protection reverse polarity protected
Short-circuit protection yes
Current consumption
Measuring plate not detected ≥ 3 mA
Measuring plate detected ≤ 1 mA
Switching state indicator LED, yellow
Functional safety related parameters
MTTFd 1697 a
Mission Time (TM) 20 a
Diagnostic Coverage (DC) 0 %
Compliance with standards and directives
Standard conformity
NAMUR EN 60947-5-6:2000
IEC 60947-5-6:1999
Electromagnetic compatibility NE 21:2007
Standards EN 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 Ga IECEx PTB 11.0021X
Equipment protection level Gb IECEx PTB 11.0021X
Equipment protection level Da IECEx PTB 11.0021X
Equipment protection level Mb IECEx PTB 11.0021X
ATEX approval
Equipment protection level Ga PTB 00 ATEX 2032 X
Equipment protection level Gb PTB 00 ATEX 2032 X
Equipment protection level Da PTB 00 ATEX 2032 X
UL approval cULus Listed, General Purpose
Ordinary Location E87056
Hazardous Location E501628
Control drawing 116-0451
CCC approval
Hazardous Location 2020322315002303
NEPSI approval
NEPSI certificate GYJ16.1394X
CML approval on request
ANZEx 19.3001X
Marine approval DNVGL TAA00001A5
Ambient conditions
Ambient temperature -25 … 100 °C (-13 … 212 °F)
Storage temperature -40 … 100 °C (-40 … 212 °F)
Mechanical specifications
Connection type screw terminals
Information for connection A maximum of two conductors with the same core cross section may be mounted on one terminal connection!
tightening torque 1.2 Nm + 10 %
Core cross section up to 2.5 mm2 , stripped insulation length: 7 mm
Minimum core cross-section without wire end ferrule 0.5 mm2 , with connector sleeves 0.34 mm2
Maximum core cross-section without wire end ferrule 2.5 mm2 , with connector sleeves 1.5 mm2
Connection (system side) screw terminals , M20 x 1.5 cable gland , usable thread length 9.1 mm , screw-in depth max. 9.1 mm
Housing material PA
Sensing face PA
Degree of protection IP66 / IP68 / IP69K
Mass 225 g
Note Tightening torque: 1.8 Nm (housing)
General information
Use in the hazardous area see instruction manuals


Associated Products: NBB20-U1K-N0


Mounting aid for VariKont and +U1+

Single-channel terminal amplifier with line breakage detection, input for NAMUR sensors, DC 24 V supply voltage, standardized interface to prevent signal transmission errors, switching state display, LED yellow

Modular mounting bracket

Weight 0.225 kg


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