Industrial safety engineering · Oxfordshire & UK-wide
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Black and yellow scanner unit with a front display.
Presence-sensing protection

Safety Scanners & Light Curtains for Robot Cells

Configured protective fields and beams designed around stopping distance, approach, occlusion, material flow and prevention of unexpected restart.

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Open access protected by a safety-rated sensing function.

Safety laser scanners and light curtains can protect loading points, open floor areas and material-transfer openings where a fixed barrier or physical door would prevent the process from working. They must be positioned and integrated so the hazardous movement reaches a safe condition before a person can reach it.

Oxford Machine Guarding reviews the complete application: detection capability, approach direction, stopping performance, control response, reach-over and reach-under routes, reflective surfaces, environmental contamination and what happens after the field is cleared.

Black and yellow scanner unit with a front display.

Safety laser scanners.

A scanner creates configurable two-dimensional warning and protective fields. This can suit open floor access, robot loading zones and applications where the protected geometry changes with operating mode. Field shape, occlusion, mounting protection, floor condition and diagnostics all influence suitability.

  • Warning and protective field design
  • Static or mode-dependent field sets
  • Open floor and approach monitoring
  • Access and presence detection
  • Safe speed or zone interfaces where applicable
  • Configuration backup and recorded checks

Safety light curtains.

A light curtain provides a defined plane of detection and can be useful at manual loading apertures or conveyor transfer points. The protected height, resolution, mounting position and safety distance must address the body part or access route being detected. Side access, reaching around the device and standing behind it must also be considered.

Pair of yellow and black light-curtain bars on a white background.

Muting and material flow.

Where products need to pass through a protective field, a correctly engineered muting arrangement may temporarily suspend the device for the material—but not for a person. Sensor sequence, timing, product geometry, direction, gaps and foreseeable interference must be considered. Additional tunnel guarding or physical restriction can also be needed.

Stopping time controls the protective distance. Robot, tooling, conveyors, brakes, control processing and protective-device response all contribute to the total stopping performance used by the design. Read the robot-cell safety distance and stop-time guide.

Typical project deliverables.

  • Application and access review
  • Device and mounting specification
  • Protective-distance or field concept
  • Safety-control and reset interface
  • Field or muting configuration
  • Functional checks and handover records
Direct answers

Technical questions.

General guidance only. The machine-specific assessment controls the final design.

Can a scanner protect an entire robot cell?

It can form part of the solution, but fencing, access control or additional sensing may still be needed depending on layout, occlusion and foreseeable entry.

Can products pass through a safety light curtain?

Potentially, using a suitable muting or transfer concept. The arrangement must distinguish the intended material flow and prevent a person reaching the hazard through the opening.

Are safety scanners suitable in dusty or wet areas?

Suitability depends on the device and environment. Dust, steam, condensation, reflective surfaces, floor condition and maintenance arrangements must be assessed.

Start with the cell and the task

Discuss your robot-cell guarding project.

Send photographs, a layout or a short description. We will help define the right survey and engineering scope.

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