The IS minialarm Sounder is a compact, 100db(a) alarm sounder. approvals include aTeX, Iecex and goST-r for zone 0 applications and fm approval for class I division 1 and class I zone 0 applications. The IS minialarm Sounder is suitable for all intrinsically safe signalling applications including re, security and process control. The IS minialarm Sounder version is also available for group I mining environments.