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）.

It is mainly used as demineralized pure water for boilers, preparation water for analytical reagents and chemicals, water for microbial culture medium, and experimental water for precision instruments. It can be widely used in power, chemical industry, pharmaceutical, life science and scientific research institutions and other fields.

It is mainly used as demineralized pure water for boilers, preparation water for analytical reagents and chemicals, water for microbial culture medium, and experimental water for precision instruments. It can be widely used in power, chemical industry, pharmaceutical, life science and scientific research institutions and other fields.

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.