System Sensor heat detector 5600 series 5601P

System Sensor 5603 135°F Fixed Temp Single-Circuit Mechanical Heat Detector

System Sensor Heat Detector 5600 Series 5601p

System Sensor 5603 135°F Fixed Temp Single-Circuit Heat Detector

System Sensor 5602 Heat Detector 194°F Fixed Temp /Rate of Rise. New In Box

System Sensor 5604 Heat Detector 194°F Fixed Temp

System Sensor 5603 Fixed Temperature Heat Detector - White

System Sensor 5603 135F Fixed Temp, Single-Circuit Mechanical Heat Detector