A diffused silicon pressure transmitter is a Wheatstone bridge diffused on a single crystal silicon chip. When the pressure of the measured medium directly acts on the diffused silicon diaphragm of the transmitter, the diaphragm of the transmitter produces a small displacement proportional to the medium pressure. Under normal working conditions, the maximum displacement of the diaphragm is not greater than 0.025 millimeters. At this time, the bridge wall resistance value of the diffusion silicon pressure transmitter changes, generating a differential voltage signal. This signal is converted into a standard analog signal or digital signal by a dedicated amplifier, which corresponds to the range.
The resistivity of silicon has a high sensitivity to pressure, and now silicon materials are commonly used as pressure transmitters, that is, diffused silicon pressure transmitters. Diffusion silicon is the core component (OEM) for manufacturing pressure transmitters, which is encapsulated in 316L stainless steel material. The applied pressure is transmitted to the sensitive chip through a stainless steel diaphragm and internally sealed silicone oil. The diffusion silicon sensitive component does not directly contact the measured medium, forming a solid-state structure for pressure measurement, making the diffusion silicon pressure transmitter suitable for more working conditions.
As a high-performance pressure measurement product, the diffusion silicon pressure transmitter can be easily amplified and assembled into a standard signal output. Diffusion silicon pressure transmitters are widely used in process control in industries such as petroleum, chemical, metallurgy, power, aviation, medical equipment, and automobiles. The diffusion silicon pressure core is reliably sealed with a fluorine rubber O-ring outside the body. The diffusion silicon pressure transmitter has the characteristics of compact structure, convenient installation, strong anti-interference, high accuracy, good stability, fast response speed, and impact resistance.
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