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The DFU911 filter unit is intended for use of ASD smoke detection in dusty and dirty environments.
DFU911 will significantly increase the lifetime of the smoke sensors installed in the ASD, while providing greater reliability against false alarms.
| Reference | DFU911 |
| Approval | EN 54-20 / EN 54-27 / EN [%VAR%] |
| Environmental conditions | According to IEC 60721-3-3 / EN 60721-3-3 3K5 / 3Z1 |
| Ambient humidity conditions | 95 / 70 % hum. rel (temporarily non-condensing / permanent) |
| Temperature range | 0 - +60 °C |
| Max. temperature. of storage allowed | 0 - +70 °C |
| Firmware versions | ASD 531 / 532 from 01.01.xx ASD 533 / 535 from 01.08.xx |
| Software versions | ASD Config from 2.1.0 ASD PipeFlow from 2.5.0 |
| Dimensions (w. x al. x prof.) | 111 x 210 x 137 mm |
| Weight | 490 g |
| Housing material | aBS blend, UL 94-V0 |
| Colour | gray 280 70 05 |
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