Pressure transmitter

　　Negative pressure transmitterIt is a sensor device used to measure negative pressure (i.e. pressure below atmospheric pressure) of gases or liquids, widely used in industrial automation, environmental monitoring, medical equipment, biopharmaceuticals, food hygiene and other fields.

　　Negative pressure transmitterThe working principle is based on differential pressure sensor technology. The two pressures of the measured medium (usually the measured pressure and atmospheric pressure or vacuum) are respectively introduced into the high and low pressure chambers, and act on the isolation diaphragms on both sides of the sensitive element (such as the delta element or diaphragm). The pressure is transmitted to both sides of the measuring diaphragm through the isolation plate and the filling liquid inside the component. The measuring membrane and the electrodes on both sides of the insulation film form a capacitor. When the pressure on both sides is not consistent, the measuring membrane will produce a micro displacement proportional to the pressure difference, resulting in unequal capacitance on both sides. This change is converted into an electrical signal output proportional to pressure through oscillation and demodulation processes.

　　Negative pressure transmitterPerformance characteristics:

1. High precision and stability:Negative pressure transmitterHas high-precision measurement capability and can accurately reflect changes in negative pressure values. Meanwhile, it has good stability and can maintain measurement accuracy during long-term operation.

2. Wide measurement range:Negative pressure transmitterCapable of measuring a wide range from small negative pressure to high negative pressure, meeting the needs of different application scenarios.

3. Multiple output signals:Negative pressure transmitterMultiple output signal types can be provided, such as analog signals (4-20mA, 0-10V, etc.), digital signals (such as HART protocol), and frequency signals, making it easy to connect with different control systems and devices.

4. Compact structure and corrosion resistance:Negative pressure transmitterIt usually has a compact structural design that is easy to install and maintain. Meanwhile, the part in contact with the medium is made of corrosion-resistant materials, which can adapt to various harsh environments.

5. Intelligent functions: PartialNegative pressure transmitterEquipped with intelligent functions such as automatic calibration, fault diagnosis, remote communication, etc., it improves the convenience and reliability of use.