中文摘要：

为了克服传统热导传感器气体检测方法的诸多缺陷，提出了一种使传感器保持在恒温状态的气体浓度检测的新方法。介绍了该方法的检测原理，并根据传热学理论证明了该方法的可行性。理论与实践表明，该方法具有许多传统检测方法所不具备的突出优点，具有良好的应用前景。

英文摘要：

In order to overcome the disadvantages of traditional method of gas concentration detection, a new method is proposed which keeps thermal conductivity sensor at a constant temperature. The principle of detection is introduced and the feasibility of method is proved theoretically based on the theory of heat transfer. It is indicated theoretically and experimentally that the proposed method has some extraordinary characters over traditional methods and can be widely used in the field of gas detection.