SIEMENS QRB4A-B050B70 PHOTOCELL LAMP

General Description:
The SIEMENS QRB4A-B050B70 is an infrared-sensitive photoresistor used for flame detection in oil-fired burners. It is designed to operate with Siemens burner controllers like LOA, LMO, and LAL series. It sends flame presence signals to the control unit to ensure safe burner operation.

Technical Specifications:

• Model: QRB4A-B050B70

• Sensor Type: Infrared (IR) photoresistor

• Cable Length: 500 mm (B050B70)

• Connection: 2-wire

• Compatibility: Siemens LOA, LMO, LAL control units

• Operating Voltage: Passive sensor (powered by controller)

• Operating Temperature: -20 °C to +80 °C

• Mounting Type: Directly on burner or with adapter

• Housing Material: Heat-resistant plastic

• Protection Class: IP40 (when installed inside burner)

Applications:

• Residential and industrial oil burners

• Boiler control systems

• Automatic burner safety monitoring

Advantages:

• Quick response for secure operation

• Fully compatible with Siemens control units

• Compact, robust construction

• Easy installation and replacement