Page 1
Inductive sensor NJ3-18GK-S1N
Technical Data
General specifications
Switching function Normally open (NO)
Output type NAMUR with safety function
Rated operating distance sn3 mm
Installation flush in mild steel
Assured operating distance sa0 ... 2.4 mm
0102
Model Number
NJ3-18GK-S1N
Features
• Nonferrous targets
• 3 mm flush in ST37 / 1.0037
• Usable up to SIL 3 acc. to IEC 61508
• ATEX approval Ex-i and Ex-nA/tc for
zone 0-2 and zone 20-22
• Degree of protection IP68
Application
Danger!
In safety-related applications the
sensor must be operated with a
qualified fail safe interface from
Pepperl+Fuchs, such as KFD2-SH-EX1.
Consider the "exida Functional Safety Assessment" document which is available on
as an integral part
of this product’s documentation.
Accessories
BF 18
Mounting flange, 18 mm
Actual operating distance s
Reduction factor rAl 1
Reduction factor r
Reduction factor r
Safety Integrity Level (SIL) up to SIL3 acc. to IEC 61508 Danger! In safety-related applications
Output type 2-wire
Nominal ratings
Nominal voltage Uo8.2 V
Switching frequency f 0 ... 200 Hz
Suitable for 2:1 technology yes , Reverse polarity protection diode not required
Current consumption
Measuring plate not detected
Measuring plate detected
Functional safety related parameters
Safety Integrity Level (SIL) SIL 3
MTTFd 10660 a
Mission Time (T
Diagnostic Coverage (DC) 0 %
Ambient conditions
Ambient temperature -25 ... 100 °C (-13 ... 212 °F)
Mechanical specifications
Connection type cable silicone , 2 m
Core cross-section 0.75 mm
Housing material Crastin (PBTB), black
Sensing face Crastin (PBTB), black
Degree of protection IP68
Cable
Bending radius
Note only for non-ferrous metal
General information
Use in the hazardous area see instruction manuals
Compliance with standards and
directives
Standard conformity
Standards
Approvals and certificates
EAC conformity TR CU 012/2011
FM approval
Control drawing
UL approval cULus Listed, General Purpose
CCC approval CCC approval / marking not required for products rated ≤36 V
1
Cu
0
304
) 20 a
M
Dimensions
2.7 ... 3.3 mm typ.
r
the sensor must be operated with a qualified fail safe interface from
Pepperl+Fuchs, such as KFD2-SH-EX1.
Consider the "exida F ment" document
which is available on as an integral part of
this product's docume
≤ 1 mA
≥ 3 mA
2
> 10 x cable diameter
EN 60947-5-2:2007
EN 60947-5-2/A1:2012
IEC 60947-5-2:2007
IEC 60947-5-2 AMD 1:2012
116-0165F
Release date: 2018-04-19 08:20 Date of issue: 2018-04-19 250935_eng.xml
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
44
24
M18 x 1
1
35.5
40.5
1
Page 2
Inductive sensor NJ3-18GK-S1N
Electrical Connection
BN
BU
BK
L+
n.c.
L-
Release date: 2018-04-19 08:20 Date of issue: 2018-04-19 250935_eng.xml
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
2
Page 3
Inductive sensor NJ3-18GK-S1N
Data for application in connection with hazardous
areas
Equipment protection level Ga , Gb , Gc (ic) , Gc (nA) , Da , Dc , Mb
Equipment protection level Ga
Type of protection intrinsic safety
CE marking 0102
Certificates
Appropriate type
ATEX certificate
ATEX marking
Standards
IECEx certificate
IECEx marking
Standards
Effective internal inductivity C
Effective internal inductance L
i
i
Maximum permissible ambient temperature T
for ATEX
for IECEx
NJ 3-18GK-S1N...
PTB 00 ATEX 2049 X
¬ II 1G Ex ia IIC T6...T1 Ga
EN 60079-0:2012+A11:2013 , EN 60079-11:2012
IECEx PTB 11.0092X
Ex ia IIC T6...T1 Ga
IEC 60079-0:2011 , IEC 60079-11:2011
≤ 70 nF
A cable length of 10 m is considered.
≤ 200 µH
A cable length of 10 m is considered.
Also observe the maximum permissible ambient temperature stated in the general technical data.
amb
Keep to the lower of the two values.
= 16 V , Ii = 25 mA , Pi = 34 mW ,
at U
i
T6 : 57 °C (134.6 °F)
T5 : 69 °C (156.2 °F)
T4 : 97 °C (206.6 °F)
T3 : 97 °C (206.6 °F)
T2 : 97 °C (206.6 °F)
T1 : 97 °C (206.6 °F)
at U
= 16 V , Ii = 25 mA , Pi = 64 mW ,
i
T6 : 52 °C (125.6 °F)
T5 : 64 °C (147.2 °F)
T4 : 92 °C (197.6 °F)
T3 : 92 °C (197.6 °F)
T2 : 92 °C (197.6 °F)
T1 : 92 °C (197.6 °F)
at U
= 16 V , Ii = 52 mA , Pi = 169 mW ,
i
T6 : 34 °C (93.2 °F)
T5 : 46 °C (114.8 °F)
T4 : 74 °C (165.2 °F)
T3 : 74 °C (165.2 °F)
T2 : 74 °C (165.2 °F)
T1 : 74 °C (165.2 °F)
at U
= 16 V , Ii = 76 mA , Pi = 242 mW ,
i
T6 : 22 °C (71.6 °F)
T5 : 34 °C (93.2 °F)
T4 : 61 °C (141.8 °F)
T3 : 61 °C (141.8 °F)
T2 : 61 °C (141.8 °F)
T1 : 61 °C (141.8 °F)
at Ui = 16 V , Ii = 25 mA , Pi = 34 mW ,
T6 : 73 °C (163.4 °F)
T5 : 88 °C (190.4 °F)
T4 : 100 °C (212 °F)
T3 : 100 °C (212 °F)
T2 : 100 °C (212 °F)
T1 : 100 °C (212 °F)
at U
= 16 V , Ii = 25 mA , Pi = 64 mW ,
i
T6 : 69 °C (156.2 °F)
T5 : 84 °C (183.2 °F)
T4 : 100 °C (212 °F)
T3 : 100 °C (212 °F)
T2 : 100 °C (212 °F)
T1 : 100 °C (212 °F)
at U
= 16 V , Ii = 52 mA , Pi = 169 mW ,
i
T6 : 51 °C (123.8 °F)
T5 : 66 °C (150.8 °F)
T4 : 80 °C (176 °F)
T3 : 80 °C (176 °F)
T2 : 80 °C (176 °F)
T1 : 80 °C (176 °F)
at U
= 16 V , Ii = 76 mA , Pi = 242 mW ,
i
T6 : 39 °C (102.2 °F)
T5 : 54 °C (129.2 °F)
T4 : 61 °C (141.8 °F)
T3 : 61 °C (141.8 °F)
T2 : 61 °C (141.8 °F)
T1 : 61 °C (141.8 °F)
Release date: 2018-04-19 08:20 Date of issue: 2018-04-19 250935_eng.xml
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
3
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Inductive sensor NJ3-18GK-S1N
Equipment protection level Gb
Type of protection intrinsic safety
CE marking 0102
Certificates
Appropriate type
ATEX certificate
ATEX marking
Standards
IECEx certificate
IECEx marking
Standards
Effective internal inductivity C
Effective internal inductance L
i
i
Maximum permissible ambient temperature T
Equipment protection level Gc (ic)
Type of protection intrinsic safety
CE marking
NJ 3-18GK-S1N...
PTB 00 ATEX 2049 X
¬ II 1G Ex ia IIC T6…T1 Ga
EN 60079-0:2012+A11:2013 , EN 60079-11:2012
IECEx PTB 11.0092X
Ex ia IIC T6...T1 Ga
IEC 60079-0:2011 , IEC 60079-11:2011
≤ 70 nF
A cable length of 10 m is considered.
≤ 200 µH
A cable length of 10 m is considered.
Also observe the maximum permissible ambient temperature stated in the general technical data.
amb
Keep to the lower of the two values.
at U
= 16 V , Ii = 25 mA , Pi = 34 mW ,
i
T6 : 73 °C (163.4 °F)
T5 : 88 °C (190.4 °F)
T4 : 100 °C (212 °F)
T3 : 100 °C (212 °F)
T2 : 100 °C (212 °F)
T1 : 100 °C (212 °F)
at U
= 16 V , Ii = 25 mA , Pi = 64 mW ,
i
T6 : 69 °C (156.2 °F)
T5 : 84 °C (183.2 °F)
T4 : 100 °C (212 °F)
T3 : 100 °C (212 °F)
T2 : 100 °C (212 °F)
T1 : 100 °C (212 °F)
at U
= 16 V , Ii = 52 mA , Pi = 169 mW ,
i
T6 : 51 °C (123.8 °F)
T5 : 66 °C (150.8 °F)
T4 : 80 °C (176 °F)
T3 : 80 °C (176 °F)
T2 : 80 °C (176 °F)
T1 : 80 °C (176 °F)
at U
= 16 V , Ii = 76 mA , Pi = 242 mW ,
i
T6 : 39 °C (102.2 °F)
T5 : 54 °C (129.2 °F)
T4 : 61 °C (141.8 °F)
T3 : 61 °C (141.8 °F)
T2 : 61 °C (141.8 °F)
T1 : 61 °C (141.8 °F)
Certificates
ATEX certificate
ATEX marking
Standards
Effective internal inductivity C
Effective internal inductance L
Maximum permissible ambient temperature T
i
i
amb
PF 13 CERT 2895 X
¬ II 3G Ex ic IIC T6…T1 Gc
EN 60079-0:2012+A11:2013 , EN 60079-11:2012
≤ 70 nF
A cable length of 10 m is considered.
≤ 200 µH
A cable length of 10 m is considered.
Also observe the maximum permissible ambient temperature stated in the general technical data.
Keep to the lower of the two values.
at U
= 20 V , Ii = 25 mA , Pi = 34 mW ,
i
T6 : 70 °C (158 °F)
T5 : 85 °C (185 °F)
T4 : 100 °C (212 °F)
T3 : 100 °C (212 °F)
T2 : 100 °C (212 °F)
T1 : 100 °C (212 °F)
at U
= 20 V , Ii = 25 mA , Pi = 64 mW ,
i
T6 : 69 °C (156.2 °F)
T5 : 84 °C (183.2 °F)
T4 : 100 °C (212 °F)
T3 : 100 °C (212 °F)
T2 : 100 °C (212 °F)
T1 : 100 °C (212 °F)
at U
= 20 V , Ii = 52 mA , Pi = 169 mW ,
i
T6 : 51 °C (123.8 °F)
T5 : 66 °C (150.8 °F)
T4 : 80 °C (176 °F)
T3 : 80 °C (176 °F)
T2 : 80 °C (176 °F)
T1 : 80 °C (176 °F)
at U
= 20 V , Ii = 76 mA , Pi = 242 mW ,
i
T6 : 39 °C (102.2 °F)
T5 : 54 °C (129.2 °F)
T4 : 61 °C (141.8 °F)
T3 : 61 °C (141.8 °F)
T2 : 61 °C (141.8 °F)
T1 : 61 °C (141.8 °F)
Release date: 2018-04-19 08:20 Date of issue: 2018-04-19 250935_eng.xml
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
4
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Inductive sensor NJ3-18GK-S1N
Equipment protection level Gc (nA)
Type of protection "n"
CE marking
Certificates
ATEX certificate
ATEX marking
Standards
Possible characteristics maximum operating voltage U
Maximum permissible ambient temperature T
Equipment protection level Da
Type of protection intrinsic safety
CE marking 0102
Certificates
Appropriate type
ATEX certificate
ATEX marking
Standards
IECEx certificate
IECEx marking
Standards
Effective internal inductivity C
Effective internal inductance L
i
i
Maximum permissible ambient temperature T
Equipment protection level Dc
Type of protection Protection by enclosure "tc"
CE marking
PF 15CERT3754 X
¬ II 3G Ex nA IIC T6 Gc
EN 60079-0:2012+A11:2013 , EN 60079-15:2010
, load current IL , minimum series resistance RV , maximum analog output voltage
U
, maximum analog output current I
Amax
Also observe the maximum permissible ambient temperature stated in the general technical data.
amb
Keep to the lower of the two values.
using an amplifier in accordance with EN 60947-5-6 : 58 °C (136.4 °F)
at U
= 9 V , RV = 562 Ω : 58 °C (136.4 °F)
Bmax
Bmax
Amax
NJ 3-18GK-S1N...
PTB 00 ATEX 2049 X
¬ II 1D Ex ia IIIC T135°C Da
EN 60079-0:2012+A11:2013 , EN 60079-11:2012
IECEx PTB 11.0092X
Ex ia IIIC T135°C Da
IEC 60079-0:2011 , IEC 60079-11:2011
≤ 70 nF
A cable length of 10 m is considered.
≤ 200 µH
A cable length of 10 m is considered.
Also observe the maximum permissible ambient temperature stated in the general technical data.
amb
Keep to the lower of the two values.
at U
= 16 V , Ii = 25 mA , Pi = 34 mW : 100 °C (212 °F)
i
at U
= 16 V , Ii = 25 mA , Pi = 64 mW : 100 °C (212 °F)
i
at U
= 16 V , Ii = 52 mA , Pi = 169 mW : 80 °C (176 °F)
i
at U
= 16 V , Ii = 76 mA , Pi = 242 mW : 61 °C (141.8 °F)
i
Certificates
ATEX certificate
ATEX marking
Standards
Possible characteristics maximum operating voltage U
Maximum permissible ambient temperature T
PF 15 CERT 3774 X
¬ II 3D Ex tc IIIC T80°C Dc
EN 60079-0:2012+A11:2013 , EN 60079-31:2014
, maximum load current I
output voltage U
Also observe the maximum permissible ambient temperature stated in the general technical data.
amb
Keep to the lower of the two values.
using an amplifier in accordance with EN 60947-5-6 : 58 °C (136.4 °F)
at U
Bmax
Amax
= 9 V , RV = 562 Ω : 58 °C (136.4 °F)
Bmax
, maximum analog output current I
Equipment protection level Mb
Type of protection intrinsic safety
Certificates
Appropriate type
IECEx certificate
IECEx marking
Standards
Effective internal inductivity C
Effective internal inductance L
i
i
Maximum permissible ambient temperature T
NJ 3-18GK-S1N...
IECEx PTB 11.0092X
Ex ia I Mb
IEC 60079-0:2011 , IEC 60079-11:2011
≤ 70 nF
A cable length of 10 m is considered.
≤ 200 µH
A cable length of 10 m is considered.
Also observe the maximum permissible ambient temperature stated in the general technical data.
amb
Keep to the lower of the two values.
at U
= 16 V , Ii = 25 mA , Pi = 34 mW : 100 °C (212 °F)
i
at U
= 16 V , Ii = 25 mA , Pi = 64 mW : 100 °C (212 °F)
i
at U
= 16 V , Ii = 52 mA , Pi = 169 mW : 80 °C (176 °F)
i
at U
= 16 V , Ii = 76 mA , Pi = 242 mW : 61 °C (141.8 °F)
i
, minimum series resistance RV , maximum analog
Lmax
Amax
Release date: 2018-04-19 08:20 Date of issue: 2018-04-19 250935_eng.xml
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
5
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