McDonnell & Miller 165302 Boiler Level Switch

McDonnell & Miller boiler level switch 165302, also listed as 94-HDLS NSMP, is a compact device designed to monitor boiler water level and send a signal to the boiler control system. The 165302 designation identifies this specific switch within McDonnell & Miller's catalog, while 94-HDLS NSMP serves as an alternate identifier used in some installations or documentation. In industrial boiler settings, level switches provide essential sensing to inform automated control decisions and to support safe, consistent boiler operation by maintaining the proper water level range. This description reflects the known identifiers for this product and its role as a dedicated boiler level switch in systems that specify either 165302 or 94-HDLS NSMP.