Selection principle: the main basis for the selection of pressure / differential pressure transmitter: the nature of the indicators measured media prevail, to save money, ease of installation and maintenance as a reference. Such as the medium is highly corrosive high viscosity, easy to crystallize the occasion inlet pressure transmitter must use isolated transmitters. To be considered in the selection of its medium to corrosion of the metal diaphragm transducer import procurement network, be sure to choose the right diaphragm material, or a short time after use will corrode the outer membrane of bad maintenance of imports transmitter, flange will be caused by corrosion of equipment and bad accidents, so material selection is very important. Transmitter diaphragm material of ordinary steel, 304 stainless steel, 316L stainless steel, tantalum diaphragm material and so on. To be considered in the selection of the temperature of the measured medium, if the temperature is high generally 200 ℃ ~ 400 ℃, to choose imported high-temperature transmitter, or silicone oil will produce vapor expansion, the measurement inaccurate. To be considered in the selection of equipment working pressure rating, pressure transmitter level must be consistent with the application. From an economic perspective, the outer membrane of the cartridge and insert part of the material is appropriate, but the connection flange can be carbon steel, chrome, it will save a lot of money. STG700 span and range limits: Lower Range Model Range upper limit URLMPa LRLMPa maximum range MPa minimum range MPaSTG730 / 73L 0.35 -0.1 0.35 0.0035STG740 / 74L 3.5 -0.1 3.5 0.035STG770 / 77L 21 -0.1 21 0.21STG78L 42 -0.1 42 0.42STG79L 69 -0.1 69 0.69 Figure 1 STG700 pressure transmitters have a rich field performance of advanced sensor technology communications / output options: ● 4-20mA dc ● Honeywell Digital Enhanced (DE) ● HART} (7.0 version) ● FOUNDATION?? Fieldbus pressure transmitters can be equipped with all communication protocols listed above. China import agent _ __ transmitter-Technology (certification) _ import transmitter provided by the Jinan-Technology Co., Ltd. Jinan Huahui Technology Co., Ltd. (www.cnhuahui.com/) Shandong Jinan, pressure meters leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. - Technology leader in China with the staff warmly welcome all inquiries negotiations to create Hua Hui Technology better future.