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Securiton's ASD 533-2 is a highly sensitive aspirating smoke detector. It uses an active air sampling system through two pipes, continuously analyzing the presence of smoke particles by means of a large volume measuring chamber and a very sensitive HD sensor
| Model | ASD 533-2 (aspiration detector for 2 pipelines) |
| Standards / Certification | EN 54‑20 classes A, B, C; UL and FM approvals (depending on version) |
| Number of suction pipes | 2 independent sampling pipelines |
| Max. length. piping | Up to approx. 2 × 100 m (max. 200 m total, according to network design) |
| Sensitivity range (alarm) | 0,02%/m - 10%/m |
| Sensitivity range (pre-alarms) | 0,002%/m - 9%/m in steps of 10% of the threshold |
| Alarm levels | 3 prealarms + 2 alarms (5 levels in total) |
| Supply voltage | 10,5 - 30 V CC |
| Typical consumption | ≈ 260 mA to 24 V CC (basic version) |
| Fan type | Radial, service life approx. 65.000 h at 40 °C |
| Suction noise | ≈ 32 typical dBA |
| Interface / Outputs | Alarm and fault relays, open collector, service interface/USB |
| Expansion slots | Up to 4 slots (p. e.g. SLM35, MCM35, RIM35) |
| Protection class | IP66, ABS housing UL mixture 94‑V0 |
| Operating temperature | −30 °C to +60 °C |
| Dimensions (H × W × D) | Approx. 397 × 265 × 146 mm |
| Weight | ≈ 3,5 kg basic version |
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