Gas sensor with drift compensation

A sensor device for detecting a gas in an environment, the sensor device comprising:

• a sensing material configured to capture the gas from the environment based on a temperature of the sensing material and an amount of the gas in the environment;
• a thermal unit thermally coupled to the sensing material, the thermal unit configured to generate a time-varying thermal signal configured to vary the temperature of the sensing material;
• one or more transducers coupled to the sensing material, the one or more transducers configured to sense a measure of the gas captured by the sensing material and generate one or more measurement signals representing the measure of the captured gas;
• and
• one or more processors electrically coupled to the one or more transducers and the thermal unit, the one or more processors configured to:
• process the one or more measurement signals representing the measure of captured gas based on the time-varying thermal signal, and
• determine the amount of the gas in the environment based on the processed one or more measurement signals.