... ±3.0 The advantage of infrared quartz tube heater as bellow:1. Infrared radiation in instant heating and the transmissivity ... of infrared is arrived to 70-75%2. Far infrared heating transmission, in medium ... . 6000h service life, with SGS, RoHs approved8. Widely used in infrared heater, cooking, oven, stove, baker, painting dryer, drying ...