Hello everyone, welcome to the Xingyi class, in this issue, let’s talk about the choice of contact material for pressure transmitters. The diaphragm materials of pressure transmitters are commonly used 316L, tantalum, Harbin C, ceramics, etc. The choice of diaphragm material is based on long-term stability, economy and compatibility. Let’s take a brief look at these materials: 316L: Cheap price, high economy; It is the most widely used diaphragm material, suitable for alkaline environments such as nitric acid, sodium hydroxide, potassium hydroxide and other alkaline environments, sulfur dioxide and hydrogen sulfide environments with a concentration of ≤68% at room temperature; Harbin C alloy: the price is higher; It is suitable for phosphoric acid environment at room temperature and various organic acids except HF acid, and is not suitable for alkaline environment and high concentration of sulfate and nitrate; Tantalum: higher price; It is not suitable for hydrofluoric acid and strong alkali media, and the rest of the media can be applied; Ceramic: cheap and economical; It is suitable for strong corrosive media, but the long-term stability is average, and the range is small; In addition to the diaphragm of the pressure transmitter, it is also necessary to pay attention to the material of other parts of the pressure transmitter, and all parts that come into contact with the material to be measured should be considered whether they are compatible with the medium to be measured. For example, O-rings, link interfaces, etc. Star Meter Manufacturing Co., Ltd. is a high-tech enterprise integrating R&D, production and sales. Specializing in the production of pressure transmitters, liquid level transmitters, temperature transmitters, temperature and humidity transmitters, differential pressure transmitters, soil moisture transmitters, 3051 transmitters and related instrumentation accessories. A number of products under the Xingyi brand have obtained a number of patent certificates issued by the state, such as CE certification, IS9001 certification, SGS certification, TüV SüD certification, explosion-proof certification, etc. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi: 400-600-4496!