Order and logistics


    Updated: 13 Nov 2018


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Startpage > Products > Smoke Detection > Duct Smoke Detector

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True Duct Smoke Detector
The TDD True Duct Smoke Detector provides an auto or manual reset relay output on detection of smoke, with a user adjustable threshold.

An analogue output can transmit smoke and service alarms to a BEMS system.

The TDD is a single stand alone unit as an Intelligent True Duct Smoke Detector.

The TDD is purpose built for duct installations to withstand, and take account of that specific environment.




Fire Curve

Press Release




  • Sensing smoke directly in the duct without help of built-in fan in the detector - no use of sampling tubes

  • Automatic compensation for dust and dirt ensuring constant sensitivity -   no false alarm

  • Damped or undamped output

  • Analogue output for service diagnostics

  • LED barograph display as option

  • Simple to clean and does not need to be removed from the duct work when cleaning is required

Compensation and measuring contamination

E-mail: ewert@automatikprodukter.se     

Phone: +46(0)31-287202

Mobile: +46(0)708885298



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