Brahma Uv cell 18210068

Brahma UV cell 18210068 is a flame detector that responds to ultraviolet radiation emitted by flames, used in gas and oil burner flame-proving circuits. It is compatible with Brahma 18210068 and Sylvania P630. 88 models. The cell is designed for precise control of gas burner valves, providing opening and closing when voltage is applied, with high thermal resistance and durable insulation. Its design resists vibrations and mechanical loads. The cell is typically mounted on a flame-sight tube or directly on the burner housing, aimed at the combustion zone.

When selecting a UV cell for replacement, key parameters include spectral sensitivity range (typically 190–290 nm), response time, supply voltage, and output signal type (current or voltage pulse). The physical mounting-thread size, sight tube length, and connector or flying leads must match the existing installation; an incorrect fit can cause false readings or no flame signal. Ensure the sight path is clear of soot, carbon, or oil deposits, and align the cell to see the steady flame, not the spark or reflected source. Verify wiring polarity and operating voltage against the burner control's requirements.

UV cells have a finite operating life; sensitivity may degrade over time due to solarisation of the quartz window or contamination by combustion residues. Symptoms include burner lockout during start-up or loss of flame signal during operation. A dirty lens can mimic a failing cell, so check and clean the sight path. If lockout occurs after replacement, verify wiring polarity, operating voltage, and compatibility with the burner control.