Product Definition

The Nexisense SMP4001 Series Universal Digital PressureTransmitter is a highly reliable, precise, and stable industrial pressure measurement device. This product adopts advanced silicon pressure sensorscombined with dedicated IC circuits, providing zero-pointand temperature compensation over a wide temperature range. The SMP4001 series plays an important role in various industries such as oil, chemical, power, and metallurgy, offeringaccurate pressure data.

This product is capable of adapting to harsh environments,especially in applications that require long-term stable operation and high-precision measurements. Its display function, simple calibration process, and resistance to lightningstrikes and pressure surges make the SMP4001 series a core device in pressure measurement systems.

Principle

The core principle of the SMP4001 Series Pressure Transmitter is based onthe silicon pressure sensor technology. A silicon pressure sensor is a sensitive element that converts external pressure signals intoelectrical signals. When external pressure is applied to the silicon diaphragm, it deforms, causing the resistance ofthe underlying silicon chip to change, thus generating an electrical signal proportional to the pressure.

The transmitter processes the electrical signal through the internaldedicated IC circuit, compensating for errors caused by temperature changes and zero-point drift, ensuring that the output signal remains stable and accurate. After the signal is processed by the IC, it is converted into a standard 4-20mA DC signaland output via terminal connections. The SMP4001 series also features a built-in display function forreal-time pressure monitoring, making it easy for users to read and operate.

Structure Analysis

The SMP4001 Series Pressure Transmitter consists of the following major components:

• Sensor Component: A silicon pressure sensor made of 316L stainless steel, offering strong corrosion resistance and suitability for harshindustrial environments.

• Display Component: A 31/2 digit LCD or LED displayscreen that shows the real-time pressure value, allowing for easy pressure monitoring.

• Housing: The housing is made of explosion-proof die-cast aluminum, ensuring safe use in hazardous environments. It meets IP65 protection standards, preventing the ingress of dust and water.

• Sealing: Fluororubber seals, providing excellent chemical resistance and adaptability tovarious fluids.

• Electrical Interface: The transmitter uses a standard 2-wire 4-20mAoutput and is equipped with reverse polarity and current-limiting protection, ensuring reliable performance in harsh conditions.

Technical Specifications

Measurement Method

The SMP4001 Series Pressure Transmitter uses the silicon pressure sensor principle to convert external pressuresignals into electrical signals, with a 4-20mA two-wire output. This output is compatible with existing control systems, allowing users to remotelymonitor and process pressure measurement data. Additionally, different pressure types, such as gauge, absolute, or sealed gauge, can be chosen according to specific industrialapplication needs.

Display Method

The SMP4001 Series provides a 31/2 digit LCD orLED display screen, clearly showing the real-time pressure value. Users can choose whether to use a display model based on their onsite requirements for easy tracking of pressure changes.

Calibration Method

The zero-point and full-scale calibration ofthe SMP4001 Series Transmitter are easy to perform with simple operations. Its built-in temperaturecompensation function ensures that the device maintains stable and accurate pressure measurementperformance, even in environments with significant temperature changes.

Application Fields

TheNexisense SMP4001 Series Digital Pressure Transmitter is widely used in the following fields:

• Industrial Process Control: Suitable for pressure monitoring and process automation control in industries such as oil, chemical, power, and metallurgy.

• Hydraulic Measurement: Used for pressure monitoring in hydraulic systems to ensureproper equipment operation.

• Pressure Measurement in Harsh Environments: Features lightning resistance, shockresistance, and corrosion resistance, making it suitable for use in demanding working environments.

Selection Guide

When selecting the SMP4001 Series Transmitter,consider the following factors:

• Pressure Range: Choose the appropriate range based on actual measurement needs.

• Pressure Type: Choose between gauge, absolute,or sealed gauge pressure types.

• Display Requirement: Choose whether to use an LCD or LED display based on the working environment.

• Interface Type: Select the appropriate pressure interface, such as G1/2 external thread or M20×1.5 external thread.

Example of a complete model: SMP4001-［0～100］kPa – E - M3C5 G

Conclusion

The Nexisense SMP4001 Series Universal Digital Pressure Transmitter, with its high precision, wide range, strong stability, and resistance to interference, is an indispensable pressure measurement device in industrial applications. Whetherin the oil, chemical, metallurgy industries or in hydraulic systems and harsh environments, theSMP4001 provides accurate and reliable pressure data, supporting efficient production management and safety monitoring. Choose the Nexisense SMP4001series for a high-performance, reliable pressure measurementtool that guarantees the security and efficiency of your industrial operations.