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Diaphragm seal is used to protect the pressure measuring instrument from being damaged by various media in application. In diaphragm seal systems, The diaphragm of the diaphragm seal separates the instrument from the medium. The pressure is transmitted to the measuring instrument through the system filling inside the diaphragm seal system. The lower chamber can be replaced without changing the diaphragm seal system. With this diaphragm seal, the low pressure range can be covered. When the temperature changes, the large diameter diaphragm has less influence on the measurement deviation of the instrument. Diaphragm seals and measuring instruments can be directly assembled, or they can be adapted to high temperatures through cooling elements or flexible capillaries. To meet customers' stringent application requirements, we can provide different designs, materials and system filling liquids.