The Tiger XT Select is a portable benzene PID gas detector that provides real-time data to accurately measure the concentration of benzene gas down to parts-per-billion (ppb) levels. It can also operate without a pre-filter tube for detecting volatile organic compounds (VOCs), such as benzene, at concentrations as low as 1 ppb benzene equivalent. With an outer moulding made of thermo plastic elastomer, this gas detector is both durable and intrinsically safe.