Flame Detectors - Siemens LME71 Series Basic Documentation

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3.4 Flame detectors

QRA2 (LME71/LME73 only)
UV flame detector for the supervision of gas flames, yellow- /
blue-burning oil flames and for ignition spark proving.
Plastic insulated housing, metalized to prevent static charging
caused by the air flow from the fan, lateral illumination.
See Data Sheet N7712
QRA4 (LME71/LME73 only)
UV flame detector for the supervision of gas flames, yellow- /
blue-burning oil flames and for ignition spark proving, metal
housing, front illumination.
See Data Sheet N7711
QRA10 (LME71/LME73 only)
UV flame detector for the supervision of gas flames, yellow-
/ blue-burning oil flames and for ignition spark proving.
Die-cast aluminum housing with a 1 in. mounting coupling
and connection facility for cooling air.
See Data Sheet N7712
QRB1
Photo resistive detector for use with Siemens burner
controls, for the supervision of oil flames in the visible light
spectrum. The QRB1 is primarily used in connection with
burner controls for burners of small capacity.
Refer to data sheet N7714.
QRB3
Photo resistive detector for use with Siemens burner
controls, for the supervision of oil flames in the visible light
spectrum. The QRB3 is primarily used in connection with
burner controls for burners of small capacity.
Refer to data sheet N7714.
QRB4
Yellow flame detector for Siemens burner controls, for
supervising oil flames in the visible light spectrum. The
QRB4 is used in connection with oil burner controls in
intermittent operation.
Refer to data sheet N7720.
QRC
Blue-flame detector for use with Siemens burner controls,
for the supervision of blue and yellow-burning oil or gas
flames. The QRC is primarily used in connection with burner
controls for burners of small capacity.
Refer to data sheet N7716.
Ionization probe
Flame detector for Siemens burner controls, for supervision of
gas flames.
To be provided on site
Basic Documentation LME7...
3 Type summary
Frontal illumination:
Lateral illumination:
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24.07.2020