Related Experiment Video
Updated: Oct 22, 2025

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
Published on: June 27, 2025
A Rapid Prototyped Thermal Mass Flowmeter
Borut Pečar1, Danilo Vrtačnik1, Matic Pavlin1
1Laboratory of Microsensor Structures and Electronics, Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, SI-1000 Ljubljana, Slovenia.
Abstract:
An innovative rapid prototyping technique for embedding microcomponents in PDMS replicas was developed and applied on a thermal mass flowmeter for closed loop micropump flowrate control. Crucial flowmeter design and thermal parameters were investigated with a 3-D fully coupled electro-thermal-fluidic model which was built in Comsol Multiphysics 5.2. The flowmeter was characterized for three distinct measuring configurations. For precise low flowrate applications, a sensor-heater-sensor flowmeter configuration with a constant heater temperature was found to be the most appropriate yielding the measuring range of 0 to 90 µL·min-1 and the sensitivity of 1.3 °C·µL-1·min in the lower flowrate range of 0 to 40 µL·min-1.
Related Concept Videos
Pipe Flowrate Measurement
The orifice meter is a simple,...
Pipe Flowrate Measurement: Problem Solving
Laminar Flow: Problem Solving
Measurement of Fluid Pressure
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...

