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The grate sensor is a monitoring device used in solid fuel boilers, particularly those burning coal or biomass, to detect the position or condition of the grate. The grate is responsible for supporting the fuel bed and allowing ash to fall through, and the sensor ensures it operates correctly. If the grate becomes jammed or misaligned, the sensor sends a signal to the control system to prevent damage or inefficient burning. A faulty grate sensor can lead to poor combustion, increased emissions, or even system shutdown. Replacing this sensor with a compatible part helps maintain smooth operation and extends the life of your boiler.