relation: https://khub.utp.edu.my/scholars/19844/ title: Wearable microfluidic sweat collection platform with a calorimetric flow rate sensor for realtime and long-term sweat rate measurements creator: Silverio, A.A. creator: Ho, E.T.W. creator: Ang, J. creator: Esguerra, K. description: 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. date: 2024 type: Article type: PeerReviewed identifier: Silverio, A.A. and Ho, E.T.W. and Ang, J. and Esguerra, K. (2024) Wearable microfluidic sweat collection platform with a calorimetric flow rate sensor for realtime and long-term sweat rate measurements. Journal of Micromechanics and Microengineering, 34 (3). relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85185542062&doi=10.1088%2f1361-6439%2fad2305&partnerID=40&md5=7f9b2a7b6735c4233a2a633674127263 relation: 10.1088/1361-6439/ad2305 identifier: 10.1088/1361-6439/ad2305