The SH122 petroleum demulsification tester is used to measure the ability of petroleum synthetic liquids to separate from water. In accordance with GBT 7605-1987, the method for determining the degree of demulsification of steam turbine oil during operation and GB-T 7305-2003, the method for determining the water separation of petroleum and synthetic liquids. The constant temperature bath adopts a small cylinder body, which is easy to operate, accurate in measurement, and