Pfannenberg Safety Integrity Level audible and visual signaling devices are specifically designed to conform to SIL 1 and SIL 2 safety requirements. These devices utilize self-monitoring circuitry and fault-indicating contact closures to alert of failure or initiate shut down / lock out of machinery until corrective action can be achieved. With full statistical data supporting conformity to SIL 1 and SIL 2 requirements, signaling solutions from Pfannenberg are a safe choice for applications such as machinery startup alarms, machine guard muting alarms, process upset alarms, and evacuation alarms.