McDonnell & Miller 354083 Liquid Level Control Sensor ProbeThe Liquid Level Control Sensor Probe from McDonnell & Miller (354083) delivers reliable liquid level sensing for boiler and hydronic systems. This low pressure Type Probe ensures accurate, repeatable readings that support safe operation and efficient system performance. It is designed for use with RB 122, RS 1 LP S, and RB 120 series liquid level control sensors, and features a 3 4 inch male threaded connection for quick, secure installation. Built

low-pressure control for furnaces and air handlers

The PCB uses robust components and protective coatings to resist heat and moisture

15 A at 6 VDC

P1231101C match common sub-models for easy cross-reference

and it carries UL approvals for both the US and Canada

delivering reliable corrosion protection and long-term performance

Built to withstand steam and water environments

The heater kit sub is engineered for compatibility

Tube: 5/8 Inch diameter

Includes two mounting brackets for robust wall or jacket mounting

support stable ignition

The compact design makes installation straightforward for qualified technicians and reduces downtime during service