For standard fan cycling

replacement of the power head is necessary

Why is the manual reset limit switch included in this kit

allowing for flexible control signal integration including 2-10VDC or floating point

McDonnell & Miller 354106 Probe 30067439-890 For standard fan cyclingEnsure reliable low water detection with the McDonnell & Miller 354106, a 2 1 4" short electrode designed specifically for your 157 RBP series and 157S RBP combination pump controllers. This conductance probe, also identified as model EA 157 S, serves as a high precision sensor for detecting boiler water levels via electrical conductivity. Built for the rigorous demands of industrial and commercial steam systems, this 354106 probe features a durable