The SCHALLER VISATRON VN301 is an advanced Oil Mist Detector (OMD) system designed to provide critical protection for large diesel, gas, and dual-fuel engines. Operating on the principle of opacity measurement, it continuously monitors the engine crankcase for the presence of oil mist, which is a precursor to a potentially catastrophic explosion. The system’s rapid detection and alarm capabilities allow for immediate engine shutdown or load reduction, safeguarding personnel, preventing severe engine damage, and ensuring operational reliability. The VN301 is a successor to the highly successful VN/87 series, offering enhanced performance and reliability for applications in marine propulsion, power generation, and industrial settings. Its robust design ensures compliance with the stringent requirements of major classification societies.