Sir Galahad II system is specifically designed for measuring mercury in gaseous samples at both on line and offline installations. It incorporates a dual purge and trap arrangement, using specific Amasil® traps, which can be configured to handle any sampling requirements. Mercury is quantified through the use of atomic fluorescence detection which allows absolute detection levels of below 0.1picogram. It is portable with a simple trolle y like carry case so can easily be transported for site to site measurements.