High & overfill level alarm system consists of level sensor, I.S barrier panel and control panel. When the magnetic float moves upward with rising level, the hermetically sealed magnetic reed switch within the stem will be de-activated. This switch will be in an open-state position, which occur output alarm. Also we can audible and visible alarm on the main alarm panel as well as external alarm on the bridge top. The 95% of volume is normally for high alarm and 98% of volume is normally for overfill alarm.
Test Lever is provided for functional test to check integrity of high level alarm system before cargo loading.