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RSS FeedsSensors, Vol. 19, Pages 819: Microfluidic Microwave Sensor for Detecting Saline in Biological Range (Sensors)

 
 

18 february 2019 23:01:24

 
Sensors, Vol. 19, Pages 819: Microfluidic Microwave Sensor for Detecting Saline in Biological Range (Sensors)
 


A device for measuring biological small volume liquid samples in real time is appealing. One way to achieve this is by using a microwave sensor based on reflection measurement. A prototype sensor was manufactured from low cost printed circuit board (PCB) combined with a microfluidic channel made of polymethylsiloxane (PDMS). Such a sensor was simulated, manufactured, and tested including a vacuum powered sample delivery system with robust fluidic ports. The sensor had a broad frequency band from 150 kHz to 6 GHz with three resonance frequencies applied in sensing. As a proof of concept, the sensor was able to detect a NaCl content of 125 to 155 mmol in water, which is the typical concentration in healthy human blood plasma.


 
72 viewsCategory: Chemistry, Physics
 
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