The SEN0470 from DF Robot is a gas level sensor that has Gravity, I2C, and UART interfaces, operates at a voltage of 3.3 to 5VDC, draws a current of 5mA, and has a detection accuracy of 90%. It is comprised of a gas detector, signal conditioning circuit, and a linear output signal for a wide variety of gaseous species. This sensor can detect an oxygen concentration of 0-100%. It is resistant to low-pressure interference and temperature adoption speed, and is ideal for monitoring oxygen concentrations in industrial spaces or in residential homes.