The Overfill Prevention System SOP 600 complies with API2350 and WHG and is type-certified up to SIL3 according to IEC 61511. It works as automatic or manual system, can detect signals for overflow, pump protection and leakage in the base of the tank and issue alarms. If limit values are violated or leaks detected, the system activates signaling elements and shows messages on a display. The system is designed for up to 16 tanks and has an automated proof-test sequence. Reports can be exported.