RAE UltraRAE 3000 creates highly precise, selective detection and measurement of Benzene and other specific toxic aromatic hydrocarbons. This advanced handheld unit utilizes a proprietary filter tube to isolate and measure Benzene levels down to parts-per-billion (ppb), offering fantastic accuracy for compliance and industrial hygiene. Featuring an integral pump and a wide 0 to 15,000 ppm  range, it is a great  tool for tank cleaning, refinery work, and petrochemical inspection.