Title:Microfluidic Flowmeter Using a Single Hot WireAuthor(s):Rafael Ecker, Bernhard JakobyAbstract:The objective of this work is the design and fabrication of a microfluidic thermal flow sensor using polymethylmethacrylate (PMMA) as substrate. This enables a simple fabrication process of the channel structure and the sensor itself using a laser engraver/cutter machine and a solvent based bonding process. A thin platinum wire, a so-called Wollaston wire, is integrated directly into the fluidic chip and acts as the only sensor element. The combination of this sensor and the customized measurement electronics enables a measurement range starting at flow velocities from 4 mm/s up to 400 mm/s (volume flow rate range starting from 10 μl/min up to 1ml/min).Booktitle:Proc. of Eurosensors 2023Page Reference:2 page(s)Publishing:2024Volume:97(1)Number:64