Test sensor, for detecting pipeline fluid flow in fire extinguishing installation, has measuring sensor immersed in flow medium along pipeline and associated electronic evaluation stage contained within sensor housing

摘要

The test sensor (2) has a measuring sensor (3) immersed in the flow medium (6) along the pipeline (1) and an associated electronic evaluation stage (4) contained within a sensor housing, the measuring sensor responding in a function testing mode to a secondary flow (10) differing from the minimum flow for the fire extinguishing medium, for providing an electrical signal equivalent to the latter.