Photoelectric duct smoke detector
The InnovairFlex D4120 4-wire photoelectric duct smoke detector by System Sensor.
The System Sensor InnovairFlex D4120 4-wire photoelectric duct smoke detector features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 ft per minute, temperatures of –4 to 158 F, and a humidity range of 0% to 95% (noncondensing). For applications that require supply and return detection, InnovairFlex has a 2-to-1 sensor to power board capability using the D4120 and the D4S. This capability eliminates the need to run power to a second power board for these applications, significantly reducing installation time and costs. It also reduces maintenance and testing costs by enabling the testing of two sensors from a single location.
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In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.
Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.