Thermal flow sensor - has heat sensitive resistance film on holder part in flow channel or detector tube

摘要

The sensor contains a detection unit with a holder section (5) arranged inside a flow channel or detector tube and which is made of insulating wire material. A heat sensitive resistance part (6) is applied to the surface of the holder part. The heat sensitive resistance is in the form of a film and is made of a material whose resistance varies with temp. Two conductive film sections are applied to the surface of the resistance part and extend over a length more than one fifth of the thickness of the holder part from both ends of the detection device. USE/ADVANTAGE - For measuring the flow and flow speed of a liquid. The sensor has a high reaction speed, stable characteristics and a low energy consumption.