Description
The Weil McLain 511-724-293 is an OEM water temperature sensor designed for use with compatible Weil McLain boiler systems. Featuring a Negative Temperature Coefficient (NTC) thermistor with a 12KOhm resistance rating, this sensor provides accurate, real-time water temperature data to the boiler control system — ensuring safe, efficient, and reliable hydronic heating operation.
Why Accurate Water Temperature Sensing Matters
In hydronic heating systems, precise water temperature measurement is critical to maintaining comfort, protecting equipment, and maximizing fuel efficiency. The NTC 12KOhm thermistor technology used in this sensor delivers a predictable resistance change in response to temperature variation, allowing the boiler control board to make accurate firing decisions and prevent overheating or short cycling.
Key Features
- OEM Weil McLain replacement water temperature sensor
- NTC (Negative Temperature Coefficient) thermistor design
- 12KOhm resistance rating for precise temperature measurement
- Direct OEM replacement — no modifications required
- Engineered for compatibility with Weil McLain boiler control systems
- Supports accurate boiler modulation and safety control functions
Application
This sensor is intended as a direct OEM replacement part for Weil McLain boilers that utilize a 12KOhm NTC water temperature sensor. Always verify compatibility with your specific boiler model and control board before installation. Consult the Weil McLain installation and service documentation for wiring and mounting specifications.
Product Details
- Brand: Weil McLain
- Part Number: 511-724-293
- Sensor Type: NTC Water Temperature Sensor
- Resistance: 12KOhm
- Application: Hydronic Boiler Systems







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