FAS‑420 Aspiration smoke detector series LSN improved
![](https://resources-boschsecurity-cdn.azureedge.net/public/images/middle/ProductPhoto_Web_all_1271048075.jpg)
FAS‑420 Aspiration smoke detector series LSN improved
Aspiration smoke detector, 1 pipe system
Commercial Type No. FAS-420-TP1
Product No. F.01U.029.255
![](https://resources-boschsecurity-cdn.azureedge.net/public/images/middle/ProductPhoto_Web_all_1271216267.jpg)
FAS‑420 Aspiration smoke detector series LSN improved
Aspiration smoke detector 2 pipe systems
Commercial Type No. FAS-420-TP2
Product No. F.01U.029.256
![](https://resources-boschsecurity-cdn.azureedge.net/public/images/middle/ProductPhoto_Web_all_1271368715.jpg)
FAS‑420 Aspiration smoke detector series LSN improved
Aspiration smoke detector, 1 pipe system
Commercial Type No. FAS-420-TT1
Product No. F.01U.029.252