This type of Melt Flow Indexer is a new and affordable tabletop instrument that tests the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of a wide range of thermoplastic raw materials (granulate). The tester conforms to all National and International Melt Flow Resistance standards, including ISO1133, ASTM D1238 and GB/T 3682. Any temperature within 120 °C--450°C(248°F-842°F) can be accurately controlled. The built-in microprocessor maintains temperature control to within ± 0.5°C, with rapid ramp-up to set point. Extruded material is automatically cut-off by the built-in scraper mechanism at preset intervals, controllable to ±0.01seconds. Model XNR-400 allows for tests according to the standards ISO1133, ASTM D1238 Method A and GB/T 3682 Method A,. Model XNR-400B allows for tests the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) according to the standards ASTM D1238, ISO1133 and GB/T 3682, with the additional function of printing the test result by micro-printer.