• P+F Thru-beam sensor LA31/LK31/31/115

    P+F Thru-beam sensor LA31/LK31/31/115

    Thru-beam sensor

    LA31/LK31/31/115

P+F Thru-beam sensor LA31/LK31/31/115

Cost-optimized series for standard tasks

Large construction with small housing

Highly visible LED

Version for universal voltages

Relay output

Wide range of mounting options


P+F Thru-beam sensor LA31/LK31/31/115


General specifications


Effective detection range    0 ... 30 m    

Threshold detection range    43 m    

Light source    LED    

Light type    modulated visible red light , 630 nm    

Alignment aid    LED yellow:
1. LED illuminates: Sufficient light signal received, emitter and receiver alignment is correct
2. LED flashes: Reaching switching point
3. LED off: Light beam is interrupted or the alignment is out    

Diameter of the light spot    approx. 800 mm at a distance of 30 m    

Angle of divergence    Emitter: 0.5 ° , Receiver: 1.5 °    

Ambient light limit    50000 Lux ; according EN 60947-5-2    


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Pepperl+Fuchs is a leading developer and manufacturer of electronic sensors and components for the global automation market. Continuous innovation, enduring quality, and steady growth have been the foundation of our success for more than 70 years. Pepperl+Fuchs employs 6,200 people worldwide and has manufacturing facilities in Germany, USA, Singapore, Hungary, Indonesia and Vietnam, most of them ISO 9001 certified.   © 2019 All Rights Reserved.