The Siemens QRA75.A27 is a continuous-operation UV flame detector designed for supervising gas and oil flames on larger industrial burners. Its die-cast aluminium housing carries a 69 mm detector tube with a bayonet-fit mounting clamp (AGG16.C adapter), supplied complete with a 2 m AGM23 connecting cable. Rated IP65 for ambient temperatures of -20°C to +60°C with a nominal UV cell life of around 10,000 hours at 50°C, it draws 3.2 VA on AC 230V, 50-60Hz supply (+10%/-15%). Made in Germany by Siemens, it is designed for continuous-operation burner controls such as the LMV5 and LME75 series.
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