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Universal Compatibility: The interchangeable hub system fits various bore sizes (1/4" to 3/4")
Frequent tripping of the 626446R limit switch is usually caused by restricted airflow
For technicians performing field service or rebuilds
The internal silicone seat and alloy steel plated spring are protected by a fabric-reinforced molded diaphragm
System Sensor D4120 Detector Freon Universal Compatibility: The interchangeable hubThe System Sensor D4120 is an industrial grade 4 wire photoelectric duct smoke detector designed for high performance smoke detection in HVAC air handling systems. This InnovairFlex duct smoke detector operates across a wide air velocity range of 100 to 4,000 feet per minute, making it suitable for both low flow and high volume applications. It features a versatile pivoting housing that accommodates square or rectangular footprints and mounts easily
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