... 1.8 vessels, 6 shafts, 2.manual reversal on headstock, 3.Compliance with ... and R&D of pharmaceuticals. ZRS-8G Dissolution Tester offers six shaft-positions and twelve vessel-positions. ... close next test-run with time-saving. The tester head at the top can be manually lifted ... changing the paddles and vessels. The microprocessor-based tester allows the temperature, rotation speed, and sampling intervals ...