Safety equipment protects workers from any machine part, function, or process that might cause injury. In use, safety gear must prevent contact, be secure or unable to be tampered with, protect the user, and create no new hazards or interference. Equipment such as machine guarding that acts as a physical barrier between a hazard and personnel is probably the most common machine safety device. Safety mats, edges, and bumpers are contact-sensing devices that function from pressure sensitivity when touched. Indicator lights can be used to give real-time safety status indications. Additionally, emergency stop buttons, safety controllers, and laser scanners can also add safety features to your facility.