Signalling the SIL of Approval SIL 1 and SIL 2 approval now comes as standard across range of E2S signaling alarm sounders, beacons and combination units Posted on 12 April 2023 Filed under Approvals, Audiovisual Signalling, Hazardous Area, New Products Tagged: ATEX, beacons, Compliance, E2S, hazardous area, IECEx, New Approval, Safe Area, SIL, SIL Approval, sounder beacons, Sounders