Gas sensors are being implemented into our everyday lives, on our handheld devices, wearables, and our homes, and all will be interconnected. There is a forecast CAGR of 6% unit 2023 which will see the gas sensor industry reaching 1.3B US$ a year. For the manufacturers CoT is a major factor, as with the higher volumes, the ASP will continue to drop, following the other MEMS sensors trend. The easiest way to reduce CoT is to test at a higher parallelism, which is easy to implement on ASIC devices, as no stimulus is required. For MEMS devices every device needs a stimulus so it is accurately calibrated, and, for gas sensors this is even more challenging due to the number of gases that need detection and the required accuracy of presenting the gas to the DUT’s. This presentation will highlight these challenges, and, at the end, identify a working solution.