The Sartolab® P20 pressure filter unit is available either with 0.2 µm or a 0.45 µm membrane, with or without a prefilter made of high purity quartz microfibers. Sartolab® P20 pressure filter units have been designed to filter batches from 100 mL to 10 L, either using a syringe or in-line with a peristaltic pump, or a pressure vessel.