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。 进口302-EPM-194

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) 大发机电供感温棒

302-135- Interior, Vertical Mounting Fixed Temperature 135°F Maximum Spacing - UL 50' x 50'

302-194 - 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'

公司是一家专业销售消防配件、电线电缆，五金机电，轨道交通配件,电工电气为主的技术类民营企业，公司自创立以来一直致力于开拓消防备件，五金机电设备，电缆，照明工程西南市场。始终坚持"诚信、创新、沟通"为企业宗旨，以"技术、服务"为立业之本的团体精神，并形成一套完整的售前、售中、售后、维护一站式服务体系。为新老客户创造高效低成本的解决方案。

进口感温棒