所有302系列的探测器都是常开的系统，有135华氏度（57摄氏度）和194华氏度（90摄氏度）两种定温度等级。

all 302 series detectors are normally open devices and are available in either 135°f (57°c) or 194°f (90°c) ratings. each unit is constructed with a high expansion .040 anodized aluminum （氧化铝）sensing shell and fine silver contacts which are hermetically sealed to ensure reliable operation. electrical rating （额定电功率）6-28 vdc, 1 amp. (all models)

美国notifier诺帝菲尔感温传感器302-epm-194

2、模拟量感温电缆k82017、k82021、k82078、感温电缆微机头k82194等等