Flameproof acoustic signallers BARTEC ETH9.. / EFST.. series are designed to be installed in industrial plants, where potential hazardous atmos-pheres occur.These areas are either classified as zone 1 and 2 or as zone 21 and 22.Used for alarm signaling indoor or with low background noise.
| Protection class | IP 66 (IEC/EN 60529) |
|---|---|
| Material | Enclosure material:Copper free aluminium alloy ( 0.1% copper) |
| Weight | see data sheet |
| Dimensions | see data sheet |
