A novel magnetic-catalytic CMOS MEMS compatible gas sensor with ultra low power consumption

Abstract

Beyond the conventional chemical sensors with heating power, we proposed a total new magnetic-catalytic sensing mechanism without heating which includes the original sensing material and also magnetic-catalytic with even higher sensitivity than before. A magnetic material in sol-gel method and a prepared solution of sol-gel SnO 2 is mixed at SnO 2 : Fe 3 O 4 = 3 : 1. The samples with several pH conditions were under test and verified inside a CO gas chamber with solenoidal coils. The sensitivity of proposed monoxide sensor reaches 0.3416%/ppm under 18.2 Gauss without heating which shows applicable for an ultra low power CO sensor with high sensitivity.

Smart Sensor Framework: A Pressure Sensor for Smart Home Applications

“…By adding further MEMS sensors to the design, one can easily perform sensor merging resulting in a massive data reduction directly at the sensor, which in turn reduces the power consumption of data transmission. Apart from pressure sensors, there are also other CMOS compatible MEMS sensors of interest for smart home applications, such as gas sensors for air quality monitoring [25], 3D imaging with an ultrasonic sensor for event detection [26] and temperature sensors for the heating system [27].…”