Final answer:
The appropriate safety device for creating a safety perimeter in a robotic work cell with minimal hazards is a presence-sensing device. It detects the presence of persons or objects within a designated area, ensuring safety without the need for a physical barrier.
Step-by-step explanation:
Rachel, a robotic engineer, has suggested using a safety device that functions as a safety perimeter with minimal hazards in a robotic work cell. The correct safety device for this application is a presence-sensing device. Such devices detect when a person or object is within a certain area and can alert the system or initiate safety protocols, without creating a physical barrier. This ensures personnel safety by preventing unintended interactions with the moving parts of the robotic system when someone enters the designated safety zone.