Weil McLain 383-500-300 Sensor By providing reliable switching for

By providing reliable switching for electric heating coils

maintaining system efficiency while preventing pilot or main burner failure due to coil degradation

For technicians maintaining HVAC pneumatic controls

Precise 24V Coil Operation: Engineered for tight tolerances within low-voltage control systems to ensure immediate and reliable circuit engagement

This prevents potential heat exchanger damage and operational hazards caused by restricted airflow

Weil McLain 383-500-300 Sensor By providing reliable switching forThe Weil McLain 383 500 300 is an OEM spec Return Supply Water Sensor designed for precision temperature regulation within hydronic systems. Engineers and technicians primarily utilize this 12k ohm NTC thermistor kit for Weil McLain Ultra Series boilers, specifically supporting Ultra Gas Boiler models such as the Ultra 310 and Ultra 80 (Series 1 & 2). By delivering real time data to the U Control module, it allows the unit to modulate firing rates