Cyclical Heating to Reduce Consumption of SnO_2 Sensors for Alcohol Monitoring

摘要

In this work, we study the response of a Tin Dioxide (SnO_2) sensor under ethanol exposure to enable alcohol monitoring under a number of different power conditions (continuous and cyclical heating) in order to investigate the impact of reduced system level power consumption on sensor sensitivity. The sensitive thin layer of SnO_2 with a thickness of 50nm was deposited by a magnetron reactive sputtering technique. The power consumption of the SnO_2 sensor when continuously heated was 53mW (280°C). In the case of a cyclical heating operating mode, power consumption was 13 mW when a frequency of 16mHz was used. The division of power consumption by four results in a slight decrease in the sensitivity of the sensor of about 25%.