SICK L21 Series Light Beam Sender, 1 Beam(s), 16 m Max Range

This safety single beam sensor is a sender unit designed for industrial machine safeguarding and presence detection in automation environments. It emits a visible red beam for object detection and integrates with common safety systems to provide a monitored protective function. The device connects via an M12 Interface and meets recognised European and UK conformity marks for use in regulated settings.

• Peak emission at 660 nm enables visible alignment and detection
• Single-beam design simplifies installation and alignment
• Maximum scanning range 16 m extends detection reach
• Response time 0.2 MS supports Rapid interrupt signalling
• Minimum sensing distance 0 m permits very close-proximity detection
• Safety rating 2 provides a defined level of functional safety

• Suitable for machine guarding on production lines
• Ideal for presence detection in conveyor systems
• Used for access control at guarded openings
• Can be used for light-beam monitoring in robotic cells

It interfaces through an M12 connector for power and signal wiring to compatible controllers and safety relays.

It can detect targets starting at 0 m, allowing reliable operation for very near-field sensing tasks.

The sender supports a maximum response time of 0.2 ms, enabling fast signalling for safety circuits.

The unit has a Compact length of 97.7mm to assist with space-constrained mounting.