preventing common field issues such as soot accumulation from over-firing or unstable flames from under-firing

For multi-tap requirements

Designed for field serviceability

the sensor must be positioned directly in the warmest part of the air discharge to respond accurately to temperature spikes

bolt-free installation and seat inspection

System Sensor 2D51 Smoke Detector Els PW 17895 preventing common field issues suchThe System Sensor 2D51 is a low profile plug in photoelectric smoke detector engineered specifically for special application smoke detection within HVAC duct systems. This head is designed for seamless integration with the D4P120 power board and requires a B210LP detector base for proper field installation. Featuring a 24Vac dc or 120Vac supply voltage range when used with the appropriate power module, the 2D51 utilizes advanced photoelectric sensing