HK-3150ZL interfacial tension meter is according with the GB/T 6541-1986 《Interfacial Tension of Oil Against Water by the Ring Method》 （1991 confirmed）.

HK-3011SK is used to measure the combustion possibility of the flammable liquid in the open environment.

HK-3011SB is used to measure the combustion possibility of the flammable liquid in the Closed environmen.

HK-3040YN Kinematic Viscosity Tester mainly used to test the viscosity of petroleum(Newtonian Liquid).

HK-3031PK is one kind of our latest production, according to GB/T 7305-2003《Water Separability of Petroleum Oils and Synthetic Fluids Test Method》.

HK-3020ND is used to test the Freeing point and Pouring point of Petroleum, with the character of fast response, accurate measurement and easy operation.

Adopt titration neutralization principle; automatically complete injection, titration, stir, judging and titration end. And then automatically display the test result and print the data.

GB/T 7600-2014 Determination of water content in transformer oils and turbine oils in service by coulometric method, GB/T 11133-2015 Standard test method for determination of water in petroleum products, lubricating oils, and additives -- Coulometric Karl Fischer titration method, GB/T 11146-2009 Crude petroleum -- Determination of water -- Coulometric Karl Fischer titration method, SH/T 0246-1992 Determination method for water content in light petroleum products (coulometric method ), ASTM D6304.

According to the DL/T421-1991《electric insulating oil Volume Resistivity Testing method》 to test the volume resistivity （Ω?cm）of Electric insulating oil、Fire resistant oil.

It is widely used in power, petroleum, petrochemical and other fields.

HK-3080XS is used to indicates how well inhibited mineral oils aid in preventing this type of rusting according to GB/T 11143-2008 《Standard test method for Rust-preventing Characteristics of inhibited oil in the presence of water》.