Description
The Siemens QRB1B-D042B20B flame sensor is a component of the flame control system for liquid fuel burners. It reacts to the yellow light of the flame emitted during the combustion of liquid fuel. It connects to a burner control unit operating in a retry-short cycle mode. It is distinguished by its high sensitivity, wide field of vision, compact housing dimensions, ease of installation and positioning.
More about the flame sensor
The sensor is assembled in a compact housing 137 mm long, to which a 2-wire cable 250 mm long with thermoplastic electrical insulation (PVC, 5.1 mm diameter sheath) is connected. The free end of the cable is connected to the automation unit. The photosensitive element is a photoresistor.
Reliable vibration-resistant mounting of the sensor is carried out using a soft polymer insert. Thanks to the sealing and connecting ribs of the insert, the device is securely fixed. To mount on the burner, prepare a hole with a transverse groove. The guide spring allows accurate positioning of the photoresistor relative to the flame.
The Siemens QRB1 sensor is compatible with burner controls of the type LAL/ LOA/ LMO/ LMV. It sends electrical signals to the control unit about the presence/absence of flame to regulate fuel supply.
Features and characteristics:
- high sensitivity, about 600 nm;
- side and straight measurements;
- photosensitive element – photoresistor;
- registration of yellow flame radiation during liquid fuel combustion;
- dust and moisture protection class IP 40;
- any mounting position;
- application in liquid fuel burners with a non-constant operating cycle;
- maintenance-free;
- supplied with a clamp;
- accurate positioning relative to the flame due to the lock;
- compact device size, facilitating installation.
Operating conditions
The flame sensor is designed to operate in ambient air temperatures of -20...+60 ºC and relative humidity < 95%. Condensation, ice formation, and water ingress on the housing are not allowed.
Please note!
Photoresistive flame sensors for Siemens QRB1 burners react to separate parts of the radiation spectrum from extraneous sources (lighting fixtures, cladding of fireproof brick of the combustion chamber, solar radiation, etc.). Therefore, safety measures must be observed when choosing the installation location and operating the sensors.
Characteristics