FiSCHER Akkumulatorentechnik manufactures self-contained emergency lighting and escape-sign luminaires built on its AT2 battery technology, together with central monitoring, from Neuss. The S1U, FiSCHER 1U, R1 and SRE escape-sign series carry the ENEC mark, a third-party type-test certification issued by CENELEC-accredited testing institutes rather than a manufacturer self-declaration, with biennial re-testing and ISO 9001 production control. Products are designed to DIN EN 1838, DIN VDE 0108-100-1 and EN 60598-2-22.