Key Features

  • Permissible temperature range: –30 °C to +60 °C
  • Immune to disturbances such as dust, dirt, moisture and steam
  • Reliable detection in difficult environments
  • Protection against false alarms
  • Simple to integrate into existing architecture


Aspirating smoke detectors from Securiton are among the most reliable early warning systems for fires.

The Securiton ASD range of Aspirating Smoke Detectors have one of the most powerful fans on the market with over 400 pascals of aspirating under pressure. It is ideal for use in harsh environments such as deep-freeze areas, explosion hazard areas or rooms with high levels of contamination. 

The Securiton ASD 533 is a highly sensitive aspirating smoke detection system. Based on the successful Securiton ASD 535 detector, the ASD 533 is well suited for smaller  applications, applications with restricted access such as EDP rooms, ultra-clean-rooms, laboratories and prison cells, or in any area where ultra-rapid detection is required such as data centres.

Securiton aspirating smoke detectors are housed in a modern IP54 enclosure and can be configured and serviced from the fire alarm control panel thanks to the “Config over Line” function.

Area Coverage

Securiton ASD 533 aspirating smoke detector can cover areas up to 1920m2.

EN54-20 Aspirating Smoke Detection Sensitivity Classes

Securiton ASD 533 can provide sensitivity Class A, B or C detection.

Sensitivity ClassNumber of sampling apertures
Class A16
Class B50
Class C50

Pipe Lengths

The Securiton ASD 533 supports one pipe network with a length of up to 200m.


The Securiton ASD 533 can be rotated so that the pipe inlets can exit towards the ground or from the top to the ceiling.


The ASD 533 offers a standard LED display with Alarm, Fault and dusty or dirty indication, and a reset and power button. 



VdS, FM, UL, UKCA, and CE are certifications marking compliance with safety and quality standards globally. VdS and FM focus on fire safety, UL offers broad safety certifications, UKCA signifies UK standards post-Brexit, and CE indicates a product meets essential EU health, safety, and environmental requirements.

Tech Specs

Supply voltage range EN 54: 10.5 to 30 VDCFM/UL: 12.4 to 27 VDC
Power consumption 210 mA
Suction pressure> 400 Pa
Sound pressure level> 34 dB (A)
HousingIP 54
Alarm sensitivity Alarm: 0.02 to 10%/m (0.00087–0.457 dB/m)Pre-signal: From 0.002%/m (0.0000869 dB/m)
Alarm levels5 (3 pre-signals, alarm, alarm 2)Adjustable pre-signals 10 to 90%
Relays3 (1 alarm, 1 fault,1 free)
PC toolUSB
InputsReset, day/night







Eurofyre is an authorised distributor of Securiton. We offer expert advice and supply all aspects of Securiton SecuriSmoke aspirating smoke detection systems including pipework calculations, demonstration/training and excellent after-sale support.

Contact us to receive competitive trade discounts or apply online for a credit account.

Securiton ASD 533

ASD 533-1, 1 Pipe Aspirating Smoke Detector

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