Abstract: Embodiments of the present disclosure provide techniques for sensor drift adjustment. A plurality of sensor measurements may be received from a gas sensor for at least a portion of a sampling period. Sampled sensor data may be generated from the plurality of sensor measurements. The sampled sensor data may comprise at least a subset of the plurality of sensor measurements that satisfy a set of operational conditions and a sample size threshold. Estimated drift data may be generated based on the sampled sensor data and one or more drift constraint. The estimated drift data may be stored. The gas sensor output may be adjusted by applying a drift adjustment model to the gas sensor output.