Serviceline
Serviceline Industrial Sensors
Serviceline Explosion Protection

Inductive sensor NJ20+U1+N

NJ20+U1+N
  • 20 mm non-flush


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

Download the complete datasheet as a PDF:


Datasheet excerpt: Technical data of NJ20+U1+N

General specifications
Switching functionNormally closed (NC)
Output typeNAMUR
Rated operating distance20 mm
Installationnon-flush
Assured operating distance0 ... 16.2 mm
Reduction factor rAl 0.4
Reduction factor rCu 0.3
Reduction factor r304 0.85
Output type2-wire
Nominal ratings
Nominal voltage8.2 V (Ri approx. 1 kΩ)
Switching frequency0 ... 150 Hz
Current consumption
Measuring plate not detected≥ 3 mA
Measuring plate detected≤ 1 mA
Functional safety related parameters
MTTFd9190 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
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
EAC conformityTR CU 012/2011
FM approval
Control drawing116-0165
UL approval
Ordinary LocationE87056
Hazardous LocationE501628
Control drawing116-0451
CSA approvalcCSAus Listed, General Purpose
CCC approvalCCC approval / marking not required for products rated ≤36 V
Ambient conditions
Ambient temperature-25 ... 100 °C (-13 ... 212 °F)
Mechanical specifications
Connection typescrew terminals
Information for connectionA 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-sectionup to 2.5 mm2
Minimum core cross-sectionwithout wire end ferrule 0.5 mm2 , with connector sleeves 0.34 mm2
Maximum core cross-sectionwithout wire end ferrule 2.5 mm2 , with connector sleeves 1.5 mm2
Housing materialPBT
Sensing facePBT
Degree of protectionIP68
NoteTightening torque: 1.8 Nm (housing)
Equipment protection level Ga
CE marking[*PD-Z02585A*]
ATEX markingEx-Hexagon II 1G Ex ia IIC T6…T1 Ga
The Ex-related marking can also be printed on the enclosed label.
StandardsEN 60079-0:2012+A11:2013 EN 60079-11:2012
Ignition protection "Intrinsic safety"
Use is restricted to the following stated conditions
Appropriate typeNJ20+U..+N..
Effective internal capacitancemax. 150 nF ; a cable length of 10 m is considered.
Effective internal inductancemax. 130 µH ; a cable length of 10 m is considered.
Ambient temperatureDetails of the correlation between the type of circuit connected, the maximum permissible ambient temperature, the temperature class, and the effective internal reactance values can be found on the EC-type examination certificate. Note: Use the temperature table for category 1 !!! The 20 % reduction in accordance with EN 1127-1 has already been applied to the temperature table for category 1.
Equipment protection level Gb
CE marking[*PD-Z02585A*]
ATEX markingEx-Hexagon II 1G Ex ia IIC T6…T1 Ga
The Ex-related marking can also be printed on the enclosed label.
StandardsEN 60079-0:2012+A11:2013, EN 60079-11:2012
Ignition protection "Intrinsic safety"
Use is restricted to the following stated conditions
Appropriate typeNJ20+U..+N..
Effective internal capacitancemax. 150 nF ; a cable length of 10 m is considered.
Effective internal inductancemax. 130 µH ; a cable length of 10 m is considered.
Maximum permissible ambient temperatureDetails of the correlation between the type of circuit connected, the maximum permissible ambient temperature, the temperature class, and the effective internal reactance values can be found on the EC-type examination certificate.
Equipment protection level Da
CE marking[*PD-Z02585A*]
ATEX markingEx-Hexagon II 1D Ex ia IIIC T135°C Da
The Ex-related marking can also be printed on the enclosed label.
StandardsEN 60079-0:2012+A11:2013 EN 60079-11:2012
Ignition protection "Intrinsic safety" Use is restricted to the following stated conditions
Appropriate typeNJ20+U..+N..
Effective internal capacitancemax. 150 nF ; a cable length of 10 m is considered.
Effective internal inductancemax. 130 µH ; a cable length of 10 m is considered.
General information
Use in the hazardous areasee instruction manuals
Category1G; 2G; 1D

Documents: NJ20+U1+N

Instruction manualsLanguageFile TypeFile Size
Instruction manualENGPDF56 KB
Manuel d'instructionsFRAPDF57 KB
BetriebsanleitungGERPDF58 KB
Manuale di istruzioniITAPDF54 KB
Manual de instruccionesSPAPDF57 KB
Technical information
Installation conditionsENGPDF210 KB
EinbaubedingungenGERPDF210 KB

Approvals+Certificates: NJ20+U1+N

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-1737PDF41 KB
Certificates
Canada USA CSA Ordinary Location1007121PDF99 KB
Canada USA UL Hazardous LocationE501628:1:1PDF405 KB
Canada USA UL Ordinary Location20170306-E87056PDF407 KB
EU PTB ATEX ia 2G, 1G, 1D s. certificatePTB 00 ATEX 2032 XPDF29293 KB
Russia NANIO "CCVE"TC RU C-DE.AA87.B.00394PDF3971 KB
Worldwide PTB IECEx iaIECEx PTB 11.0021XLINK---
Control drawings
Control Drawing FM / Control Drawing FM   PDF686 KB
Control drawing UL / Control drawing UL   PDF294 KB

Associated Products: NJ20+U1+N

Accessories

Mounting aid for VariKont, +U1+ and +U9* fa

Mounting aid for VariKont and +U1+ fa
Modular mounting bracket fa