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)
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'