SI-3151 Capacitive-Absolute Pressure Transmitter

SI-3151 Absolute Pressure Transmitter is a capacitive pressure transmitter. It can be used not only for Absolute Pressure, but also for gauge pressure measurement.

SI-3151 Capacitive-Absolute Pressure Transmitter contains linearity and temperature compensation circuits inside. So the whole transmitter can achieve high precision and high stability.

Capacitive pressure sensor has extremely high anti-overload performance and excellent performance in micro-pressure measurement. Widely used in various complex industrial environments.

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Pressure Sensors

Advantages of SI-3151 Capacitive-Absolute Pressure Transmitter

The characteristics of capacitive pressure transmitters are:

1. High output signal: The circuit of the pressure transmitter can directly convert a small change in capacitance into a high output signal. without signal amplification. The piezoresistive sensor (thin mode, C-type) has disadvantages such as low output signal and easy to be interfered by external signals. This is usually the main reason why the sensor has poor stability, is greatly affected by temperature, and is susceptible to electromagnetic wave interference.
2. Good long-term stability: Compared with other similar products, the pressure transmitter has higher stability. Unlike other sensors such as metal strain sensors, capacitive pressure transmitters have little creep, aging and temperature effects. Almost all adverse factors have less impact on the output stability of capacitive sensors than other forms of sensors. The zero point stability of the pressure transmitter can reach 0.05%FS/year.
3. Mechanical deformation: A small change in the distance between the plates of the sensitive capacitor mold can produce a measurable voltage signal change. The small mechanical deformation greatly reduces the hysteresis and non-repeatability errors of the sensor, and the speed of the sensor is also greatly improved.
4. Wide measurement range: SI-3151 Capacitive-Absolute Pressure Transmitter has a very wide measurement range, it can accurately measure the pressure in the range of 25Pa ~ 70MPa, and has extremely high stability.
5. High performance: The capacitive material used to make the transmitter has extremely stable physical and chemical properties. Make the product have extremely high performance. Sensors with accuracy up to ± 0.02%FS, stability better than ± 0.05%FS. Such high performance is difficult to achieve by products using other sensitive principles.

SI-3151 Capacitive-Absolute Pressure Transmitter Specifications

absolute pressure transmitter working principle

Pressure (gauge pressure)/absolute pressure transmitter is a pressure signal measured with atmospheric pressure/vacuum as the reference terminal, and only one port is connected to the process pipeline.

The working principle of metal capacitive pressure (gauge pressure)/absolute pressure transmitter is:
When the pressure acts indirectly on the surface of the metal measuring diaphragm (elastic measuring element) of different thickness through the isolation diaphragm and the pressure guide medium. Make the diaphragm slightly deformed. The maximum deformation does not exceed 0.1mm. A high-precision measurement circuit converts this tiny deformation into a voltage signal that is linear with the differential pressure signal. After linearization, temperature compensation. Then use a dedicated chip to convert this voltage signal into an industry standard 4-20mA current signal or 1-5V voltage signal.

The working principle of capacitive pressure transmitter and capacitive absolute pressure transmitter is the same as that of differential pressure transmitter, the difference is that the pressure of low pressure chamber is atmospheric pressure or vacuum.

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SI-3151 Capacitive-Absolute Pressure Transmitters

Sino-Inst is a manufacturer of Capacitive-Absolute Pressure Transmitters. SI-3151 Capacitive-Absolute Pressure Transmitters adopts high-performance pressure-sensing chips. With advanced circuit processing and temperature compensation technology, it converts pressure changes into linear current or voltage signals .

SI-3151 Capacitive-Absolute Pressure Transmitters have HART communication, communication and self-diagnosis functions. Users use handheld terminals or fieldbus systems to transmit, read, display and input all working information and additional information of transmitters from a long distance.

There are many types of pressure sensors, such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, Silicon piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors and capacitive sensors.

A capacitive sensor is a device that converts the measured change into a change in capacitance, which itself is a variable capacitor. Because this sensor has the characteristics of simple structure, small size, good dynamic response, high sensitivity, high resolution, and non-contact measurement, it is widely used in displacement, acceleration, vibration, pressure, pressure difference, liquid level, etc. Sub-content and other detection fields.

If you need to purchase Capacitive-Absolute Pressure Transmitters, or have any technical questions about Absolute Pressure Transmitters, please feel free to contact our engineers.

SI-3151 Capacitive-Absolute Pressure Transmitter | Sino-Inst

SI-3151 Absolute Pressure Transmitter is a capacitive pressure transmitter. It can be used not only for Absolute Pressure, but also for gauge pressure measurement.

Product SKU: SI-3151 Capacitive-Absolute Pressure Transmitter

Product Brand: Sino-Inst

Product Currency: USD

Product Price: 265

Price Valid Until: 2039-09-09

Product In-Stock: InStock

Editor's Rating:
5