Precision design: Siemens Photocell QRB 1B Red is engineered for small/medium-sized oil burners. Fuel versatility: Designed for light oil and kerosene burners, offering 1-2 stage operation. Wide-ranging compatibility: Suitable for numerous light oil burner brands, including Riello, Bentone, Ecoflam, and more. German excellence: Proudly Made in Germany, ensuring top-notch quality and reliability for Siemens Flame Sensor QRB 1B Red.