this brass electrode rod is the industry standard for maintaining consistent differential levels and high-low alarm setpoints

Always verify the voltage requirements on the powerhead plate before installation to avoid electrical failure

or 4-wire installations where a C-wire may not be present

it can be used in any 5k Ohm thermistor circuit requiring a 4-inch probe

Hydrotherm BM-8782 Aquastat Limit 30067439-890 this brass electrode rod isThe Hydrotherm BM 8782 Aquastat Limit is a specialized immersion type temperature controller designed for precise fluid management in hydronic heating boilers. As a critical safety and operational component, this aquastat high limit switch monitors internal water temperatures to prevent overheating conditions that can lead to system fatigue or pressure relief valve discharge. Engineered with a durable liquid filled sensing element and a robust SPST