Large filter plant perform a harsh duty, continuously removing particulates from final emissions to atmosphere. Strict environmental compliance demands that these filter plant operate on a continuous basis. Fabric filter bags will have a limited life span and will eventually require replacing. A failure of a filter bag due to prolonged abrasion and repeated blow-back will result in a rapid and large release of particulates to the atmosphere. identifying the problem bag and getting the replacement fitted rapidly can make the difference between a minior and a major emissions breach.