How to make the seismic stress inside the oil is not white?

Seismic pressure gauge, also called oil filled pressure gauge. Mainly used in the environment of strong vibration measurement of pressure. We sometimes found in the case of oil will be white, so how to make seismic pressure inside the oil is not white? Nature is as a manufacturer, we don't want to appear such circumstance, but still there will be a small percentage of white oil. For this we have done a lot of testing, summarizes may cause a whitish three reasons: 1. Manufacturers use glycerin is too cheap, impurity is in the oil; 2. The oil filled pressure gauge (inner core The spring tube and copper head) Cleaning process does not reach the designated position, after the welding joint of pressure gauge copper pipe and copper base after high temperature after heating stalwart, produce a large number of oxide and the residual flux on the surface, such as not to clean, oil filled pressure gauge will be white in a short time after. 3. Oil filled pressure gauge using occasions of high temperature influence, undermining the oil internal composition, causing the oil change physical properties, and metamorphic pale. Suit the remedy to the case, we also modify and update the production process of seismic pressure gauge to ensure to provide qualified products.