长期供302-EPM-194 开关量感温棒 302-EPM-194 194°F–Explosionproof,1/2”thread,vert.mtd.3UL–40x40ft. 150°F (66°C) 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)
Interior, Vertical Mounting Fixed Temperature 135°F Maximum Spacing - UL 50' x 50'
Interior, Vertical Mounting Fixed Temperature 194°F Maximum Spacing - UL 50' x 50'
这款应该是室内使用
302-ET-135 - All Weather, Vertical Mounting Fixed Temperature 135°F Maximum Spacing - UL 50' x 50'
302-All Weather, Vertical Mounting Fixed Temperature 194°F Maximum Spacing - UL 50' x 50'
这款是所有的环境使用
302-AW-135 - Moisture and Dust Proof, Vertical Mounting Fixed Temperature 135°F Maximum Spacing - UL 50' x 50'
302-AW-194 - Moisture and Dust Proof, Vertical Mounting Fixed Temperature 194°F Maximum Spacing - UL 50' x 50'
这款是防潮和防尘
302-EPM-135 - Explosion Proof Screw base, Vertical Mounting Fixed Temperature 135°F Maximum Spacing - UL 40' x 40'
302-EPM-194Explosion Proof Screw base, Vertical Mounting Fixed Temperature 194°F Maximum Spacing - UL 40' x 40'
这款是防爆的，也是最贵的价格差一倍多
AP-P - Adapter Plate for 4" Box, used with 302, 302-H and 302-AW
这是一个托盘，跟302, 302-H and 302-AW这些产品配套使用