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 （氧化鋁）sensing shell and fine silver contacts which are hermetically sealed to ensure reliable operation. Electrical Rating （額定電功率）6-28 VDC, 1 amp. (all models)
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'
這款應該是室內使用
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'
這款是所有的環境使用
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'
這款是防潮和防塵
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'
這款是防爆的，也是最貴的價格差一倍多
AP-P - Adapter Plate for 4" Box, used with 302, 302-H and 302-AW
