Honeywell L91B1068 10/300# Prop.#-Trol,28/110 Dif
The Honeywell L91B1068 stands as a proportional pressure controller, serving as an intelligent switch designed to maintain pressure in diverse HVAC equipment such as boilers, furnaces, and air handlers. Utilizing a bellows sensor to detect pressure changes, it dynamically adjusts an internal potentiometer. This potentiometer output, in turn, governs motors or valves, ensuring seamless adjustment of air or fluid flow to achieve the desired pressure. In contrast to basic on/off switches, the L91B1068 excels in providing precise and stable pressure control, thereby enhancing overall efficiency and reducing wear on equipment. Featuring an adjustable range and rugged construction, it exhibits adaptability across various applications. Although now obsolete, the L91B1068's legacy persists through its reliable performance and versatility, marking it as a noteworthy precursor to newer models.