Serviceline Industrial Sensors
Serviceline Explosion Protection

Retroreflective sensor RLK91-6-IR/25/31/115

  • Retroreflective sensor for single-beam closing edge protection
  • Narrow housing suitable for small gaps
  • Sturdy plastic housing
  • Various possibilities for mounting
  • Version with infrared light
  • AC version

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  RLK91-6-IR/25/31/115

Product Description
Mid-range photoelectric sensors for detecting people, objects, and vehicles
General specifications
Effective detection range0 ... 6 m
Reflector distance0 ... 6 m
Threshold detection range9 m
Reference targetH85-2 reflector
Light sourceLED
Light typemodulated infrared light
Diameter of the light spotapprox. 230 mm at a distance of 6000 mm
Angle of divergenceapprox. 2.5 °
Ambient light limit90000 Lux
Functional safety related parameters
MTTFd1083.4 a
Indicators/operating means
Function indicatorLED red, flashes when falling short of the stability control
Electrical specifications
Rated operating voltage96 ... 240 V AC
Power consumption12 VA
Contact ratingsaccording to UL 508
1/8 HP, 1.9 FLA, 240 V AC, Pilot Duty Code D150 6,000
1.5 FLA, 120 V AC, Pilot Duty 30,000
0.8 FLA, 240 V AC, Pilot Duty 30,000
Switching typelight-on
Signal outputWeak current relay, 1 alternator
Switching voltagemax. 240 V AC
Switching current2.5 A / 240 V AC
Switching powermax. 120 W / 600 VA
Switching frequency25 Hz
Response time20 ms
Product standardEN 60947-5-2
Approvals and certificates
EAC conformityTR CU 020/2011
TR CU 004/2011
UL approvalcULus Listed
For overcurrent protection, install a fuse with a rated current of max. 5 A and min. 240 V AC
CCC approvalCertified by China Compulsory Certification (CCC)
Ambient conditions
Ambient temperature-20 ... 55 °C (-4 ... 131 °F)
Storage temperature-20 ... 75 °C (-4 ... 167 °F)
Mechanical specifications
Degree of protectionIP65
Connection5 m fixed cable
Optical faceLuran®
Mass100 g


ECLASS 11.027270902
ECLASS 10.0.127270902
ECLASS 9.027270902
ECLASS 8.027270902
ECLASS 5.127270902
ETIM 8.0EC002717
ETIM 7.0EC002717
ETIM 6.0EC002717
ETIM 5.0EC002717
UNSPSC 12.139121528

Documents: RLK91-6-IR/25/31/115

Instruction leafletsLanguageFile TypeFile Size
Instruction leaflet / Beipackzettel ALLPDF330 KB

CAD+CAE: RLK91-6-IR/25/31/115

CADFile TypeFile Size
3-D model / 3-D-ModellSTP169 KB
CAD Portal / CAD PortalLINK---

Approvals+Certificates: RLK91-6-IR/25/31/115

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of Conformity / EU-KonformitätserklärungDOC-0994APDF183 KB
China CQC CCC SDOC2020970305000213PDF245 KB
US CA UL General PurposeE87056LINK---

Associated Products: RLK91-6-IR/25/31/115

Mounting bracket fa
Reflector, rectangular 51 mm x 61 mm, mounting holes, fixing strapfa
Reflector with mounting holesfa
Reflector, rectangular 84.5 mm x 84.5 mm, mounting holesfa
Reflector, rectangular 60 mm x 18 mm, mounting holesfa
Reflector, rectangular 182 mm x 42 mm, mounting holesfa
Reflective tape 100 mm x 100 mmfa

Function: RLK91-6-IR/25/31/115

Concentration on the essentials is the hallmark of the 91 series. As AC sensor, these economical, reliable and easy-to-use photoelectric sensors can be used almost universally. Their narrow design means that they can be used in any environment

The single-beam photoelectric sensors of the 91 series are suitable for closing-edge monitoring for elevators, barriers and doors, as well as for object detection and object tracking in material handling systems.