This instrument is designed and made as per national standard GB/T266 Petroleum Products- Determination of Engler Viscosity, T0622 Bitumen Engler Viscosity Determination(Engler viscometer method) in national industrial standard JTG E20-2011 Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering and Shanghai enterprise standard Q/YXYY11 WNE-1 Engler Viscometer.It is suitable to determine the rate of time(seconds) of liquid flow out from Engler viscometer and time(seconds) of distilled water flow out at 20ºC under certain temperature and cubage.This rate is the Engler viscosity.Unit is Engler degree.