Patent ID: 8265881

Claim:
A system comprising: a sensing unit including: a gas sensor configured to generate a gas sensor signal in response to a presence of at least one gas, and a heater configured to adjust a temperature of the gas sensor; at least one processor adapted to: control the heater to adjust the temperature of the sensor to a first temperature value for a first period of time, determine a first signal value by measuring the gas sensor signal during the first period of time, control the heater to adjust the temperature of the sensor to a second temperature value for a second period of time, determine a second signal value by measuring the gas sensor signal during the second period of time, and calculate concentration information for the at least one gas based at least in part on: the first signal value and a first calibration relationship of the sensing unit at the first temperature value, and the second signal value and a second calibration relationship of the sensing unit at the second temperature value; and wherein the first temperature value is different than the second temperature value.