ERWEKA offers three versions of Tapped Density Testers. SVM 101/201 complies with USP method 1 , SVM 102/202 with USP method 2, Pharm.Eur. and DIN ISO EN 787 part 11 while at the SVM 203 one test station operates according USP method one and the other one simultaneously according USP method 2, Pharm.Eur, DIN ISO EN 787 part 11