... BF-30A Sulfur Content of Dark Petroleum ProductsTester(Tubular Furnace Method) 1. Performance and CharacteristicsTwo tubes; single ... of flow meter 60~600ml/minThermocoupleK-typeMoving distance of furnace 150mmTime of movement 30min, 35min, 40min, 45min, ... furnace system, single chip control system, air purification system, air flow control system, etc. Two parallel quartz tubes with siphons can test ...