響(xiang)應(ying)時(shi)(shi)間(jian)(jian)(jian)(jian)代表(biao)氣(qi)敏元(yuan)件(jian)對被檢測氣(qi)體(ti)(ti)的響(xiang)應(ying)速(su)度。從原則上(shang)講，響(xiang)應(ying)越快越好，即氣(qi)敏元(yuan)件(jian)接觸被測氣(qi)體(ti)(ti)或氣(qi)體(ti)(ti)濃度一(yi)有變化，器件(jian)阻(zu)值馬上(shang)隨之變化到其確定阻(zu)值。但實(shi)際上(shang)總(zong)要(yao)有一(yi)段時(shi)(shi)間(jian)(jian)(jian)(jian)才能達到穩定值。定義響(xiang)應(ying)時(shi)(shi)間(jian)(jian)(jian)(jian)tres為元(yuan)件(jian)接觸被測氣(qi)體(ti)(ti)后，電阻(zu)達到該濃度下(xia)穩定阻(zu)值90%時(shi)(shi)所需的時(shi)(shi)間(jian)(jian)(jian)(jian)，定義為響(xiang)應(ying)時(shi)(shi)間(jian)(jian)(jian)(jian)，常用tres表(biao)示。