are among the basic equipment of many laboratories and production facilities due to their comparably easy handling. They are classical, displacement pumps. The transport through the tube is achieved by outer mechanical deformation of the tube. As it is only the tube which is in contact with the product, batch or product chances can be carried out easily and with a reduced danger of cross-contamination 45, 59. With peristaltic pumps, substances with a higher amount of solid particles or a high viscosity can be transported. Also, the dosage of small quantities is possible. However, the tube pinching causes shear forces as a consequence of the pulsatile transport. See pumps, tubes.