Lock Out Tag Out (LOTO) devices are essential tools in industrial safety, designed to protect workers from unexpected hazards while servicing or maintaining machinery. These devices are part of a systematic approach that isolates energy sources and prevents equipment from operating unexpectedly. By implementing LOTO procedures, companies can significantly reduce the risk of workplace injuries and comply with safety regulations.

LOTO devices generally consist of two main components： locks and tags. Lockout devices physically secure switches, valves, or other energy-isolating mechanisms, making it impossible to activate machinery accidentally. Tagout devices, on the other hand, are visible warning labels that indicate the equipment is under maintenance and should not be operated. While locks provide a physical barrier, tags communicate critical information to personnel, serving as both a deterrent and a reminder. The scope of LOTO extends to all forms of energy that could pose risks to workers. Electrical systems, hydraulic and pneumatic machinery, chemical lines, and even pressurized pipelines are all potential hazards that require proper isolation. Each energy source must be carefully identified, controlled, and verified before maintenance work begins. This ensures that employees are not exposed to unexpected releases of energy, which could result in severe injuries or fatalities.