This work shows the development and char- acterization of a fully 3D-printed thermal mass flow sensor, based on regular and carbon-doped thermoplastic polyurethane (TPU). Using multi material fused deposition modelling (FDM) 3D-printing, the sensor is based on one heater element and two resistive thermal sensors (sensor - heater - sensor configuration). The transduction is based on the temperature dependent resistance of carbon doped polymers. Characterisation of the conductive TPU shows a positive thermal coefficient of resistance (TCR) ranging between 0.002 ◦C−1 to 0.024 ◦C−1 , whereas the sensor shows a responsivity of 20 mV ml−1 min−1 in the pseudo linear range for flows below 3 mL min−1 while using a power of 1W and a temperature up 58◦C.
|Title of host publication||2020 IEEE Sensors|
|Publication status||Published - 9 Dec 2020|
|Event||IEEE Sensors 2020 - Virtual Event|
Duration: 25 Oct 2020 → 28 Oct 2020
|Conference||IEEE Sensors 2020|
|Period||25/10/20 → 28/10/20|