
Inductive sensor NCB8-18GM40-N0-V1
Technical Data
General specifications
Switching function  Normally closed (NC) 
Output type  NAMUR 
Rated operating distance  sn8 mm 
Installation flush 
Assured operating distance  sa0 ... 6.48 mm
0102
Model Number
NCB8-18GM40-N0-V1
Features
•8 mm flush
• Usable up to SIL 2 acc. to IEC 61508
Accessories
V1-W-N-2M-PUR
Female cordset, M12, 2-pin, NAMUR, PUR cable
V1-G
Female connector, M12, 4-pin, field attachable
V1-W
Female connector, M12, 4-pin, field attachable
EXG-18
Quick mounting bracket with dead stop
V1-G-N-2M-PUR
Female cordset, M12, 2-pin, NAMUR, PUR cable
BF 18
Mounting flange, 18 mm
Actual operating distance  s 
Reduction factor rAl  0.39 
Reduction factor r 
Reduction factor r 
Output type  2-wire
Nominal ratings
Nominal voltage  Uo8.2 V (Ri approx. 1 kΩ) 
Switching frequency  f 0 ... 1500 Hz 
Hysteresis  H 1 ... 15 typ. 5 % 
Reverse polarity protection  reverse polarity protected 
Short-circuit protection  yes 
Suitable for 2:1 technology  yes , Reverse polarity protection diode not required 
Current consumption   
Measuring plate not detected 
Measuring plate detected 
Switching state indicator  Multihole-LED, yellow
Functional safety related parameters
MTTFd  2660 a 
Mission Time (T 
Diagnostic Coverage (DC)  0 %
Ambient conditions
Ambient temperature  -25 ... 100 °C (-13 ... 212 °F) 
Storage temperature  -40 ... 100 °C (-40 ... 212 °F)
Mechanical specifications
Connection type  Connector plug M12 x 1 , 4-pin 
Housing material  Stainless steel 1.4305 / AISI 303 
Sensing face  PBT 
Degree of protection  IP66 / IP67
General information
Use in the hazardous area  see instruction manuals
Category 
Compliance with standards and 
directives
Standard conformity   
NAMUR 
Electromagnetic compatibility 
Standards 
Approvals and certificates
EAC conformity  TR CU 012/2011 
FM approval   
Control drawing 
UL approval  cULus Listed, General Purpose 
CSA approval  cCSAus Listed, General Purpose 
CCC approval  CCC approval / marking not required for products rated ≤36 V
  0.36
Cu
  0.71
304
) 20 a
M
Dimensions
7.2 ... 8.8 mm typ. 8 mm
r
≥ 2.2 mA 
≤ 1 mA
1G; 2G; 3G; 1D
EN 60947-5-6:2000 
IEC 60947-5-6:1999 
NE 21:2007 
EN 60947-5-2:2007 
EN 60947-5-2/A1:2012 
IEC 60947-5-2:2007 
IEC 60947-5-2 AMD 1:2012
116-0165
Release date: 2018-04-19 08:14 Date of issue: 2018-04-19 181089_eng.xml
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
4
24
LED
M12x1
M18x1
40
45
55
6
1
 

Inductive sensor NCB8-18GM40-N0-V1
Electrical Connection
Pinout
1
2
L+
L-
1
2
4
3
Wire colors in accordance with EN 60947-5-6
1  BN 
2  BU
(brown) 
(blue)
Equipment protection level Ga
CE marking  0102
ATEX marking  ¬ II 1G Ex ia IIC T6…T1 Ga The Ex-related marking can also be printed on the enclosed label.
Standards  EN 60079-0:2012+A11:2013 EN 60079-11:2012 Ignition protection "Intrinsic safety" 
Appropriate type  NCB8-18GM...-N0...
Effective internal inductivity  C
Effective internal inductance  L
Ambient temperature  Details of the correlation between the type of circuit connected, the maximum permissible ambient temperature, the 
Equipment protection level Gb
CE marking  0102
ATEX marking  ¬ II 1G Ex ia IIC T6…T1 Ga 
Standards  EN 60079-0:2012+A11:2013 EN 60079-11:2012 Ignition protection "Intrinsic safety" 
Appropriate type  NCB8-18GM...-N0...
Effective internal inductivity  C
Effective internal inductance  L
Maximum permissible ambient temperature T
i
i
i
i
Use is restricted to the following stated conditions
≤ 120 nF ; a cable length of 10 m is considered.
≤ 50 µH ; a cable length of 10 m is considered.
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.
The Ex-significant identification is on the enclosed adhesive label
Use is restricted to the following stated conditions
≤ 120 nF ; a cable length of 10 m is considered.
≤ 50 µH ; a cable length of 10 m is considered.
Details of the correlation between the type of circuit connected, the maximum permissible ambient temperature, the 
amb
temperature class, and the effective internal reactance values can be found on the EC-type examination certificate.
Release date: 2018-04-19 08:14 Date of issue: 2018-04-19 181089_eng.xml
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
2
 

Inductive sensor NCB8-18GM40-N0-V1
Equipment protection level Gc (ic)
Certificate  PF 13 CERT 2895 X
CE marking 
ATEX marking  ¬ II 3G Ex ic IIC T6…T1 Gc 
Standards  EN 60079-0:2012+A11:2013 EN 60079-11:2012 Ignition protection category "ic" Use is restricted to the following 
Effective internal inductivity  C
Effective internal inductance  L
Special conditions   
   for Pi=34 mW, Ii=25 mA, T6 
   for Pi=34 mW, Ii=25 mA, T5 
   for Pi=34 mW, Ii=25 mA, T4-T1 
   for Pi=64 mW, Ii=25 mA, T6 
   for Pi=64 mW, Ii=25 mA, T5 
   for Pi=64 mW, Ii=25 mA, T4-T1 
   for Pi=169 mW, Ii=52 mA, T6 
   for Pi=169 mW, Ii=52 mA, T5 
   for Pi=169 mW, Ii=52 mA, T4-T1 
   for Pi=242 mW, Ii=76 mA, T6 
   for Pi=242 mW, Ii=76 mA, T5 
   for Pi=242 mW, Ii=76 mA, T4-T1 
Equipment protection level Gc (nL)
Standard conformity  EN 60079-15:2003 Ignition protection category "n"
Effective internal capacitance C
Effective internal inductance Li  ≤ 50 µH ; A cable length of 10 m is considered.
General  The apparatus has to be operated according to the appropriate data in the data sheet and in this instruction manual. 
Special conditions   
   for Pi=34 mW, Ii=25 mA, T6 
   for Pi=34 mW, Ii=25 mA, T5 
   for Pi=34 mW, Ii=25 mA, T4-T1 
   for Pi=64 mW, Ii=25 mA, T6 
   for Pi=64 mW, Ii=25 mA, T5 
   for Pi=64 mW, Ii=25 mA, T4-T1 
   for Pi=169 mW, Ii=52 mA, T6 
   for Pi=169 mW, Ii=52 mA, T5 
   for Pi=169 mW, Ii=52 mA, T4-T1 
   for Pi=242 mW, Ii=76 mA, T6 
   for Pi=242 mW, Ii=76 mA, T5 
   for Pi=242 mW, Ii=76 mA, T4-T1 
Equipment protection level Da
CE marking  0102
i
i
  ≤ 120 nF ; a cable length of 10 m is considered.
i
The Ex-significant identification is on the enclosed adhesive label
stated conditions
≤ 120 nF ; a cable length of 10 m is considered.
≤ 50 µH ; A cable length of 10 m is considered.
74 °C (165.2 °F)
89 °C (192.2 °F)
100 °C (212 °F)
69 °C (156.2 °F)
84 °C (183.2 °F)
100 °C (212 °F)
51 °C (123.8 °F)
66 °C (150.8 °F)
74 °C (165.2 °F)
39 °C (102.2 °F)
52 °C (125.6 °F)
52 °C (125.6 °F)
Use is restricted to the following stated conditions
The data stated in the data sheet are restricted by this operating instruction! 
The special conditions must be observed! 
The ATEX Directive applies only to the use of apparatus under atmospheric conditions. 
If you use the device outside atmospheric conditions, consider that the permissible safety parameters should be 
reduced.
74 °C (165.2 °F)
89 °C (192.2 °F)
100 °C (212 °F)
69 °C (156.2 °F)
84 °C (183.2 °F)
100 °C (212 °F)
51 °C (123.8 °F)
66 °C (150.8 °F)
74 °C (165.2 °F)
39 °C (102.2 °F)
52 °C (125.6 °F)
52 °C (125.6 °F)
ATEX marking  ¬ II 1D Ex ia IIIC T135°C Da The Ex-related marking can also be printed on the enclosed label.
Standards  EN 60079-0:2012+A11:2013 EN 60079-11:2012 Ignition protection "Intrinsic safety" 
Appropriate type  NCB8-18GM...-N0...
Effective internal inductivity  C
Effective internal inductance  L
Maximum permissible ambient temperature T
Release date: 2018-04-19 08:14 Date of issue: 2018-04-19 181089_eng.xml
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
i
i
Use is restricted to the following stated conditions
≤ 120 nF A cable length of 10 m is considered.
≤ 50 µH ; a cable length of 10 m is considered.
Details of the correlation between the type of circuit connected, the maximum permissible ambient temperature, the 
amb
surface temperature, and the effective internal reactance values can be found on the EC-type-examination 
certificate. 
The maximum permissible ambient temperature of the data sheet must be noted, in addition, the lower of 
the two values must be maintained.
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