Product Definition

Nexisense SMP7700 differential pressure transmitter is a high-precision resistive differential pressure measuring device designed for industrial applications, capable of accurately measuring the differential pressure of gases and liquids. Its unique structure and advanced technology ensure high stability and reliability in various environments.

Principle

The working principle of the SMP7700 differential pressure transmitter is based on the piezoresistive effect. The sensitive element is a solid-state piezoresistive sensor chip, which is filled with silicone oil between the chip and two corrugated diaphragms. When the measured differential pressure acts on the diaphragms, the pressure is transmitted to the sensitive chip through the silicone oil, and the output signal from the Wheatstone bridge in the chip is linearly related to the differential pressure, enabling accurate measurement.

Structure Analysis

The structure of the SMP7700 differential pressure transmitter is designed with high stability and reliability in mind, and it mainly consists of the following components:

• Sensitive Element: Solid-state piezoresistive sensor chip with excellent linear output characteristics.

• Corrugated Diaphragm: Used to sense differential pressure and ensure precise transmission.

• Silicone Oil: Filling between the chip and diaphragm, facilitating pressure transmission.

• Signal Processing Circuit: Processes the output electrical signal from the sensitive chip, converting it into usable measurement data.

Measurement Method

The SMP7700 differential pressure transmitter employs a piezoresistive measurement method, which has the following advantages:

• High Precision: Ensures a good linear relationship between the output signal and differential pressure through a precise Wheatstone bridge design.

• High Stability: Utilizes high-stability materials and advanced circuit design to guarantee measurement accuracy over long-term use.

• Multiple Output Signals: Supports various output options such as 4mA to 20mA DC, 1V to 5V DC, accommodating different application needs.

Product Parameters

Application Fields

Nexisense SMP7700 differential pressure transmitter is widely used in the following industries:

• Oil and Chemical: For monitoring and controlling pressure changes in production processes.

• Power Industry: For pressure monitoring in power plants and substations.

• Urban Water Supply: For pressure measurement in water management.

• Hydrological Exploration: For pressure monitoring of groundwater and surface water.

• Hydraulic Systems: For pressure control and monitoring in hydraulic equipment.

Selection Tips

When selecting, please pay attention to the following points:

1. Installation Requirements: It is recommended to install a three-valve group between the measurement point and the transmitter to ensure that the measured medium is slowly and uniformly applied to the positive and negative pressure chambers of the differential pressure transmitter.

2. Power Grounding: In extreme application scenarios, such as strong lightning environments, ensure reliable grounding of the power supply and install lightning protection devices.

3. Pressure Limitations: The static pressure at the measurement point should not exceed 20MPa, and the positive and negative pressure of the transmitter must not exceed the specified overload values.

Conclusion

Nexisense SMP7700 differential pressure transmitter, with its high precision, high stability, and reliability, is an ideal choice in the industrial measurement field. Its unique design and versatile application capabilities demonstrate exceptional performance in industries such as oil, chemical, and power generation. Whether in harsh environments or complex measurement tasks, the SMP7700 provides accurate and stable measurement results, making it your trusted measurement partner.