FIELD: particle detection systems.
SUBSTANCE: invention is related to aspiration smoke alarm systems. An aspiration particle detection system is provided having a wall or ceiling passage (100) for fluid connection of an end (200) of a pipe or hose of an aspiration particle detection system with a controlled environment (300), wherein the wall or ceiling passage (100) contains a linear portion (110) having a first linear end (111) for fluid connection with the end (200) of a pipe or hose of a particle detection aspiration system, and a second linear end (112) located opposite the first linear end (111). The second linear end (112) is made with a suction hole (113), a fastener (120) for fixing the wall or ceiling passage (100) inside the through hole (320) of the wall or ceiling space structure (310) and a flange-shaped shoulder part (114), extending in a radial direction starting from the second linear end (112), wherein the fastener (120) has one or more retractable springs (121).
EFFECT: ability to fix the particle detection system inside a through hole from the front side of a wall or ceiling spatial structure, without access to its rear side.
13 cl, 5 dwg
