Measuring high-viscosity fluids in industrial production has always been a technical challenge. Target Flow Switch As a commonly used flow measurement instrument, it is widely used in high-viscosity fluid measurement due to its simple structure and high reliability. This article will detail Target Flow Switch the working principle, selection points, and techniques in high-viscosity fluid measurement, helping users better understand Target Flow switch manufacturers and their products.

Working Principle of Target Flow Switch

A target flow switch is a flow measurement instrument designed based on fluid mechanics principles. Its core component is a target plate installed in the pipeline. When fluid flows past the target plate, it exerts a force on the plate, the magnitude of which is proportional to the fluid's flow velocity. By measuring the force on the target plate, the fluid flow rate can be indirectly measured.

Specifically, the working principle of a target flow switch can be divided into the following steps:

1. Fluid impacts the target plate : When fluid flows through the pipe, it impacts the target plate installed in the pipe, and the target plate is subjected to the force of the fluid.
2. Force transmission and conversion : The force on the target plate is transmitted to the sensor through a mechanical transmission mechanism, and the sensor converts the mechanical force into an electrical signal.
3. Signal processing and output : After amplification and processing, the electrical signal outputs a signal proportional to the flow rate for display or control.

Selection Points for Target Flow Switches

When selecting a target flow switch, the following key factors need to be considered:

1. Fluid characteristics

The characteristics of high-viscosity fluids significantly impact the selection of flow switches. These mainly include:

• Viscosity : High-viscosity fluids have high viscosity and large flow resistance, requiring the selection of a target flow switch suitable for high-viscosity measurement.
• Temperature : The fluid temperature affects its viscosity and fluidity. Selection should consider the temperature's impact on measurement accuracy.
• Corrosiveness : If the fluid is corrosive, a target flow switch made of corrosion-resistant materials should be selected.

2. Pipe size

The size of the target flow switch should match the pipe size to ensure measurement accuracy and easy installation. Generally, target flow switches have a wide range of diameters, and users can choose suitable products according to the actual pipe size.

3. Measurement range

When selecting a target flow switch, the appropriate measurement range should be selected based on the actual flow range. Measurement ranges that are too high or too low will affect measurement accuracy.

4. Output signal

Target flow switches have various output signal types, such as analog signals (4-20mA) and switch signals. Users should select the appropriate output signal type based on their actual needs.

5. Environmental conditions

The installation environment also affects the performance of the target flow switch, such as ambient temperature, humidity, and vibration. These factors should be considered during selection.

Techniques for High-Viscosity Fluid Measurement

In high-viscosity fluid measurement, the application of target flow switches requires mastering some techniques to improve measurement accuracy and stability.

1. Reasonable selection of installation location

• Avoid near bends and valves : Near bends and valves, the fluid flow state is complex, easily producing vortices and uneven velocity distribution, affecting measurement accuracy. The target flow switch should be installed in a straight pipe section as much as possible.
• Ensure sufficient straight pipe sections before and after : Generally, there should be 10 and 5 times the pipe diameter of straight pipe sections before and after the target flow switch, respectively, to ensure stable fluid flow.

2. Optimize target plate design

• Target plate shape : For high-viscosity fluids, circular or elliptical target plates can be selected to reduce the impact force and wear of the fluid on the target plate.
• Target plate material : Select the appropriate target plate material based on the fluid's corrosiveness and temperature, such as stainless steel or Hastelloy.

3. Adjust measurement parameters

• Zero point calibration : Perform zero-point calibration after installation to eliminate system errors.
• Range adjustment : Adjust the range of the target flow switch according to the actual flow range to ensure measurement accuracy.

4. Regular maintenance and calibration

• Clean the target plate : High-viscosity fluids easily deposit on the target plate, affecting measurement accuracy. The target plate should be cleaned regularly to keep its surface smooth.
• Calibrate the instrument : Regularly calibrate the target flow switch to ensure its measurement accuracy.

5. Pay attention to fluid temperature changes

The viscosity of high-viscosity fluids varies significantly with temperature. Therefore, the fluid temperature should be kept stable during measurement. If necessary, temperature compensation measures can be taken to improve measurement accuracy.

Common Problems and Solutions

In high-viscosity fluid measurement, target-type flow switches may encounter some common problems. Below are some common problems and their solutions:

1. Large Measurement Error

• Cause : Improper installation location, unreasonable target plate design, large fluid temperature changes, etc.
• Solution : Optimize the installation location, select the appropriate target plate shape and material, and take temperature compensation measures.

2. Severe Target Plate Wear

• Cause : The fluid contains solid particles, the target plate material is not wear-resistant, etc.
• Solution : Select a wear-resistant target plate material and perform regular cleaning and maintenance.

3. Unstable Signal

• Cause : Electromagnetic interference, sensor failure, etc.
• Solution : Take shielding measures, check if the sensor is working properly, and replace the sensor if necessary.

Target Flow switch manufacturers Selection

Choosing the right manufacturer of target-type flow switches is also crucial for ensuring measurement accuracy and stability. Here are some suggestions for choosing a manufacturer:

1. Manufacturer Qualifications

Choose a manufacturer with relevant qualifications and certifications, such as ISO certification and CE certification, to ensure product quality.

2. Technical Strength

Understand the manufacturer's technical R&D capabilities and production equipment, and choose a manufacturer with strong technical capabilities.

3. Product Quality

Check the manufacturer's product quality inspection reports and user reviews, and choose a manufacturer with reliable product quality.

4. After-Sales Service

Choose a manufacturer that provides comprehensive after-sales service, such as installation guidance, technical support, and regular maintenance.

5. Industry Experience

Choose a manufacturer with extensive experience in the industry, whose products better meet the needs of practical applications.

Conclusion

Target-type flow switches have unique advantages in high-viscosity fluid measurement, but also require certain application skills. By reasonably selecting the installation location, optimizing the target plate design, adjusting measurement parameters, and performing regular maintenance and calibration, the measurement accuracy and stability can be effectively improved. Choosing the right manufacturer of target-type flow switches is also key to ensuring measurement results. It is hoped that this introduction will help users better understand target-type flow switches and their applications in high-viscosity fluid measurement, providing a reference for practical work.