In the field, if you want to measure the pressure value you want, you must choose the right type of pressure transmitter! According to the different needs of the site for pressure values, we can divide the pressure types into three categories, relative pressure, absolute pressure, and sealing pressure. Now let’s briefly talk about their definitions and look at the differences. Relative Pressure: The pressure value expressed using real-time atmospheric pressure as a baseline. Above the real-time atmospheric pressure, it is positive, and vice versa. Since the pressure measured by most manometers is relative pressure, the relative pressure is also known as gauge pressure. Absolute Pressure: The pressure value expressed with absolute vacuum as the reference. So it only has positive pressure, no negative pressure. It is also the true value of pressure experienced by the object. Absolute pressure = relative pressure + real-time atmospheric pressure Sealing pressure: The pressure value expressed by the fixed pressure sealed in the chamber as a reference. Above this fixed pressure is positive pressure, otherwise negative pressure. It is not affected by real-time atmospheric pressure. It is suitable for pressure measurement in some special sites. That’s the difference between the three types of pressure! Choose the right pressure transmitter and determine the appropriate pressure type on site. 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!