the 89M8501 is a common part number variant used in factory documentation

and an aluminum 60 to 90F scaleplate

mercury-free solution for contractors requiring high-amperage switching without the complexity of digital interfaces

High-Capacity Conductivity: Features 10 gauge wire rated for 600V

As a veteran's choice for HVAC flow switch parts

Cleveland Controls AFS-275-112 Switch the 89M8501 is a commonThe Cleveland Controls AFS 275 112 is a versatile differential air pressure switch designed for critical HVAC air proving and energy management applications. Built to sense positive, negative, or differential air pressure, this SPDT pressure switch features an adjustable set point range from 0. 05" WC to 2. 0" WC. The plated housing contains a durable silicone diaphragm and a snap acting switch mechanism, ensuring reliable performance in package