NF603 Needle Flame Tester - Laboratory Flammability Testing Solution This Needle Flame Tester is engineered for evaluating fire hazards caused by small flames that may result from fault conditions within electronic equipment. Conforming to IEC 60695-11-5, the apparatus uses a precisely controlled needle burner with a Ø0.9mm nozzle to simulate the effect of small flames produced by internal component failures. The tester features adjustable burner angles of 0°, 20°, and 45°