The first question we get asked when buying a pressure transmitter is, “What media are you measuring?” In general, the measuring medium of the pressure transmitter is gas and liquid, but it is important to note that the measuring medium of the pressure transmitter, whether it is a gas or a liquid, must be compatible with the contact material of the pressure transmitter. The contact parts between the pressure transmitter and the measured medium include diaphragms, process connections (threads, clamps, etc.). The diaphragm, clamps, threads and housing of the pressure transmitter are made of high-quality 304 stainless steel and 316L stainless steel. This means that the medium measured by the pressure transmitter must be compatible with the 304 or 316L. The 304 stainless steel used in the pressure transmitter is a common material in stainless steel, with a density of 7.93 g/cm3, also known as 18/8 stainless steel in the industry. High temperature resistance of 800°C, with good processing performance and high toughness. 304 stainless steel is widely used in the manufacture of equipment and parts that require good overall properties (corrosion resistance and formability). In order to maintain the corrosion resistance inherent in stainless steel, the steel must contain more than 18% chromium and more than 8% nickel. The 316L stainless steel selected for the pressure transmitter has a certain application in the instrumentation industry because of its excellent corrosion resistance, and 316L is also a derivative steel grade of 18-8 type austenitic stainless steel, with 2~3% Mo element added. The Mo content of 316L gives this grade excellent resistance to pitting, and most of the existing 316L on the market is produced according to the American standard. The main difference between 316 and 304 in terms of chemical composition is the content of Mo, 316 has better corrosion resistance, and is more resistant to corrosion than 304 in high-temperature environments. Therefore, in high-temperature environments, engineers prefer to choose parts made of 316 material. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi: 400-600-4496!