Siemens Flame Sensor QRB3

Energy combustion,Ahmadabad local source of all types of siemens make flame sensor. The Siemens QRB3 is a photoresistive flame detector designed specifically for supervising yellow-burning oil flames. Unlike the industrial QRA or QRI series, the QRB3 is used primarily for intermittent operation (systems that shut down at least once every 24 hours). The "3" in the model name indicates that this version comes with a metal protective tube, which sets it apart from the more compact plastic-housed QRB1. Technical Specifications Feature Specification Detection Type Photoresistive (Visible Light) Spectral Sensitivity Max. approx. 600 nm Operating Mode Intermittent Operation Sensitivity Normal (Black casing) or High (Red casing) Protective Tube Metal, 17 mm external diameter Cable Type 2-wire thermoplastic cable Protection Rating IP40 Temperature Range -20 °C to +60 °C Mounting Position Optional (Frontal or Lateral illumination) Key Characteristics Visible Light Detection: It is tuned to 600 nm, which perfectly matches the light emitted by yellow oil flames. However, this means it is also sensitive to ambient light (like boiler room lighting or sunlight), so it must be shielded from external light sources. Metal Housing: The QRB3 is more rugged than the QRB1 due to its 17 mm metal protective tube. This makes it suitable for burners where the sensor is subjected to more mechanical stress. Sensitivity Variants: * QRB3: Normal sensitivity (identifiable by a black plastic insert). QRB3S: High sensitivity (identifiable by a red plastic insert). Compatible Burner Controls: It is used with a wide range of Siemens/Landis & Staefa controllers, including the LOA..., LAL..., LMO..., and LMV... series. Installation & Mounting The QRB3 is almost always secured using a specific flange and clamp system. Flange Part No: 428614900 Clamp Part No: 418688060 Maintenance Note: When cleaning the sensor, never use burner cleansing sprays. Use only a clean, dry, lint-free cloth to avoid damaging the photoresistive element.