Aspirating smoke detector, method and device for monitoring an aspirating smoke detector

Abstract

The invention relates to an aspirating smoke detector (1) comprising a smoke detection unit (8), an aspiration unit (9) and a sampling pipe (2) having a detection-side end (2a), a detection-remote end (2b) and sampling holes (3) between the detection-side end (2a) and the detection-remote end (2b), wherein the aspirating smoke detector (1) is arranged to suck air through the sampling holes (3) into the sampling pipe (2) in the direction of the detection-side end (2a) by means of the aspiration unit (9) and to supply it to the smoke detection unit (8), comprising a differential pressure sensor arrangement (10) configured to determine at least one differential pressure value between a first measuring site (10a) and a second measuring site (10b), the first measuring site (10a) being inside the sampling pipe (2), and the second measuring site (10b) being outside of the sampling pipe (2) or being inside the sampling pipe (2) and remotely from the first measuring site (10a). The invention further relates to a method of monitoring an aspirating smoke detector (1), with determining at least one differential pressure value by means of a differential pressure sensor arrangement (10), comparing the least one differential pressure value with a threshold pressure value, and detecting a fault of the aspirating smoke detector (1) when the at least one differential pressure value exceeds the threshold pressure value, or falls below the pressure value, respectively.

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