%0 Journal Article
%A Silverio, A.A.
%A Ho, E.T.W.
%A Ang, J.
%A Esguerra, K.
%D 2024
%F scholars:19844
%J Journal of Micromechanics and Microengineering
%K Calorimetry; Flow rate; Fluidic devices; Heat convection; Substrates; Thermal gradients; Wearable sensors, Calorimetric flow rate sensor; Channel modelling; Flow rate sensors; Microfluidic channel modeling; Microfluidics channels; Rate sensing; Real- time; Sweat rate sensing; Sweat rates; Wearable devices, Microfluidics
%N 3
%R 10.1088/1361-6439/ad2305
%T Wearable microfluidic sweat collection platform with a calorimetric flow rate sensor for realtime and long-term sweat rate measurements
%U https://khub.utp.edu.my/scholars/19844/
%V 34
%X This work presents the design and fabrication of a wearable microfluidic patch-based system for sweat collection with a calorimetric flow rate sensor based on heat convection for measuring sweat rate (SR). The effects were predicted using a 3D multi-physics simulator and were verified on a fabricated patch made of polyimide layers. The sensor can detect surface temperature gradients of 302-312 K caused by fluid flowing thru the microfluidic channels at a rate of 0.5-23 µg s�1 that fall within the physiological range of SR. Meanwhile, the relation between flow rate and temperature gradient is highly linear (Pearson r2 = 0.999) and repeatable. This work also demonstrates a low-cost method for patterning microfluidic channels on flexible substrates which can be used for mass production of wearable patches. © 2024 IOP Publishing Ltd.
%Z cited By 0