Meltblown is an efficient and widely used process for manufacturing of many air filtration media. Especially HEPA base materials are typically produced in this way. More recently, it is shown that meltblown production lines can quickly be set-up to provide answers to the increasing world-wide demand for mouth masks. Hammer--IMS provides small C-shape basis-weight scanners to boost-up product quality within a single meltblown production batch, but also to guarantee repetitive quality over multiple batches.