Serviceline Industrial Sensors
Phone: 330-486-0001
Fax: 330-405-4710
Serviceline Explosion Protection
Phone: 330-486-0002
Fax: 330-963-5827

Inductive sensor NBB20-U1-A2

  • Sensor head bidirectional and rotatable
  • 20 mm flush
  • 4-wire DC
  • 4 LEDs indicator for 360° visibility
Unit Price:  122.00  USD
 in stock

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of NBB20-U1-A2

General specifications
Switching functioncomplementary
Output typePNP
Rated operating distance20 mm
Output polarityDC
Assured operating distance0 ... 16.2 mm
Reduction factor rAl 0.33
Reduction factor rCu 0.31
Reduction factor r304 0.74
Reduction factor rBrass 0.38
Nominal ratings
Operating voltage10 ... 30 V DC
Switching frequency0 ... 440 Hz
Hysteresistyp. 5 %
Reverse polarity protectionreverse polarity protected
Short-circuit protectionpulsing
Voltage drop≤ 2 V
Operating current0 ... 200 mA
Off-state current0 ... 0.5 mA
No-load supply current≤ 20 mA
Operating voltage indicatorLED, green
Switching state indicatorLED, yellow
Functional safety related parameters
MTTFd1230 a
Mission Time (TM)20 a
Diagnostic Coverage (DC)0 %
Approvals and certificates
EAC conformityTR CU 020/2011
UL approvalcULus Listed, General Purpose
CSA approvalcCSAus Listed, General Purpose
CCC approvalCCC approval / marking not required for products rated ≤36 V
Ambient conditions
Ambient temperature-25 ... 85 °C (-13 ... 185 °F)
Storage temperature-40 ... 85 °C (-40 ... 185 °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 materialPA/metal with epoxy powder coating
Sensing facePA
Housing diameter
Degree of protectionIP68 / IP69K
Mass225 g
NoteTightening torque: 1.8 Nm (housing)

Documents: NBB20-U1-A2

Technical informationLanguageFile TypeFile Size
Installation conditionsENGPDF209 KB
EinbaubedingungenGERPDF203 KB
warunki montażuPOLPDF221 KB
Product information
Product information - A level higher - The new VariKontENGPDF1214 KB


CADFile TypeFile Size
3-D model in IGS format / 3-D-Modell im IGS-FormatIGS2629 KB
3-D model in STP format / 3-D-Modell im STP-FormatSTP2003 KB

Approvals+Certificates: NBB20-U1-A2

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-2579APDF171 KB
US CA CSA1007121 (LR96321-2)PDF101 KB
US CA UL General PurposeE87056LINK---

Associated Products: NBB20-U1-A2

Receptacles, M12/M20; plastic versionfa
40.00  USD

In stock

Modular mounting bracket fa
28.00  USD

Contact Us

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