Continuous particulate emission monitor and baghouse filter leak detector replaces manual and fluorescent dust leak inspections and reduces personnel exposure to confined spaces and hazardous particulate. Automatic self-checks to automate EPA MACT requirements for periodic instrument validations are available. Particulate monitor also offers automatic signal diagnostics to improve performance and simplify setup in difficult applications such as chemical plants and pharmaceutical spray dryers. Benefits include stack monitoring, detecting and locating filter leaks (by row) for maintenance, eliminating cleanup costs, preventing the escape of powders and protecting downstream equipment such as blowers and HEPA filters.