Update: 29 September, 2023
The document describes the features and characteristics of the Flow Sens FS5L / FS5LA thermal mass flow sensor, which is suitable for various applications in liquids. The sensor consists of two temperature-dependent platinum resistors, one used as a heater and the other for measuring the reference temperature. A bridge circuit is used to measure the differing resistance values of the two elements, resulting in different (self) heating. The (self) heating is dependent on the applied voltage, mass flow, and the medium in which the sensor is located. Higher voltage increases self heating, while a higher flow rate increases cooling. By maintaining constant self heating with a suitable controller, the voltage increases with higher flow rates and becomes a measure of the mass flow. Due to its low thermal mass, this sensor has fast heating and cooling response times. The measurement principle of the sensor can be used for
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MD5 Checksum: 830ED1E97FBEDB920B2E3B67CADF645E
Publication date: 09 May, 2012
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PDF Link: IST -Flow Sens FS5L FS5LA Thermal Mass Flow Sensor for all-purpose use in Liquids PDF