功能

• Take 10 mL of the sample in an Ostwald viscometer and it to measure the relative viscosity of benzene at the same temperature in a thermostatic bath at 30±0.1°C. The number of seconds of water outflow at 30°C is 120±20 seconds. Capillary inner diameter 0.48~0.52 mmJISK Manufactured with reference to 6725-1977.