link to page 4 Figure 2 displays the typical response of the raw signal of SGP40 to various VOCs as a function of their concentrations in otherwise clean air. Figure 2 Typical sensor response to various VOCs normalized to 500 ppb of ethanol. ISO 2-gas mix according to ISO16000-29 is composed of n-octane and m-xylene in a molar ratio of 53:47. Data were recorded at 25 °C and 50 % RH and a power supply of VDD of 3.3 V. www.sensirion.com Version 1.1 – September 2021 4/19