In modern industries and technical applications, pressure measurement and control play an extremely important role. Pressure testers and pressure measuring devices have become essential tools to help ensure the safety, efficiency and reliability of operating systems.
A pressure tester is a set of devices and tools used to measure, test and monitor pressure in various systems. From pressure testing in pneumatic and hydraulic systems, to pressure monitoring in boiler systems, HVAC and medical devices, these tools ensure that systems operate within limits. safety and optimal performance.
In this article, we will explore the main components, operating principles, and applications of pressure testers and pressure measuring devices. Let's learn how these devices have been contributing to improving efficiency and ensuring safety in many areas of industry and daily life.1. What is a pressure tester?
• Pressure is an important physical quantity, expressing the force acting per unit area in a direction perpendicular to the surface of an object. The unit of pressure measurement can be pascal (Pa), bar, psi, or mmHg, depending on the specific application.
• Pressure measuring devices are indispensable tools for measuring and monitoring pressure in systems. They ensure that processes operate consistently and safely. Pressure measuring devices are used to measure the pressure of liquids or gases. There are many types of pressure measuring devices, each designed for different specific applications.2. Structure of the pressure tester
The pressure tester consists of many different components, each of which plays an important role in measuring and monitoring pressure. Below are the main structures of a pressure tester:
Pressure Gauges:
• Mechanical watches: Use a spring or membrane mechanism to display pressure.
• Electronic meter: Uses an electronic sensor to measure and display pressure on a digital screen.
Pressure sensors:
• Absolute pressure sensor: Measures pressure relative to absolute vacuum.
• Relative pressure sensor: Measures pressure relative to current atmospheric pressure.
• Differential pressure sensor: Measures the pressure difference between two points in the system.
Pressure regulator:
• This device helps regulate and control the pressure in the system, ensuring the pressure is always maintained at the desired level.
Pressure check valve:
• Needle valve: Allows for very precise pressure flow regulation.
• Ball valve: Used to quickly open or close flow.
Pipes and connection accessories:
• Pipe: Conveys pressure from the measuring point to the gauge or sensor.
• Connection accessories: Connectors and joints help connect components in the system.
Data logger and display:
• This device records the measured pressure values and displays them on the screen for easy monitoring and analysis by the user.
Power supply:
• For electronic measuring devices, the power supply (battery or adapter) is a necessary component for the device to operate stably.3. Application of pressure measuring and testing devices
In every industry, from food and pharmaceuticals to oil and gas and energy, pressure measuring equipment plays a vital role in controlling and maintaining stable working pressure. Here are some specific applications to illustrate the importance of pressure measuring equipment:
The importance of pressure measuring equipment
Monitor and control the process
Accurate pressure measurement helps ensure industrial processes are safe and efficient. In the chemical process industry, strict pressure control prevents leakage of toxic chemicals and ensures product quality. In oil and gas production, pressure monitoring helps prevent oil spills, protect the environment, and ensure employee safety. In power generation, pressure gauges control steam pressure, ensuring optimal performance of the turbines.
Application in the medical industry
Pressure measuring devices are not only limited to industries but are also widely used in medicine. They monitor and control blood pressure, an important indicator of heart health. The device also aids in monitoring and treating medical conditions such as glaucoma and intracranial pressure, contributing to improved healthcare for patients.
Predict and prevent incidents
An important benefit of pressure measuring equipment is its ability to predict and prevent problems before they occur. By continuously monitoring and analyzing pressure data, these devices can detect signs of abnormalities early, allowing timely corrective measures to be taken. This not only minimizes safety risks but also saves on maintenance and repair costs.
4. Operating principle of the pressure tester
- When the pressure in the system increases, it pushes on the pressure sensor, causing this component to contract and convert into an electrical signal. Depending on the type of pressure sensor, this electrical signal can be a voltage, current or frequency value.
- The electronic part in the pressure relay will process this signal and compare it with the set value. If the signal value exceeds the set value, the circuit will be activated to turn on the pressure-related device.- When the pressure in the system drops. The pressure sensor will open and the electrical signal will decrease or disappear. The circuit will continue to monitor the value of the signal, and activate the circuit. To turn off the pressure-related device if the signal value drops below the set value.
5. Common types of pressure measuring and testing equipment
Pressure Gauges
• A pressure gauge is the most common pressure measuring device, with a dial that displays the pressure value in units such as psi, bar, or kPa. This device can measure the pressure of liquids and gases in a variety of applications, including plumbing, pneumatic systems, and industrial equipment.
• Another type of pressure gauge uses a column of liquid to measure pressure, usually mercury or water. The height of the liquid column determines the pressure. Mercury barometers are used in many fields such as medicine, science and meteorology.
Pressure sensors
• A pressure sensor is a pressure measuring device that generates an electrical signal proportional to the applied pressure. They are used in a variety of sectors, including industrial, medical and automotive.
Pressure Switches
• A pressure switch senses the pressure of a liquid or gas and activates an electrical switch when the pressure reaches a preset level. This switch is used in various applications such as industrial, medical and automotive.
There are two main types of pressure switches:
• Mechanical pressure switch: Uses a mechanical mechanism to sense pressure and activate an electrical switch. They are simple and inexpensive but may not be as accurate and reliable as electronic switches.
• Electronic pressure switch: Uses an electronic sensor to sense pressure and activate the electrical switch. They are more accurate and reliable than mechanical switches but are also more expensive.
However, the pressure switch only provides information about whether the pressure is above or below a specified level without providing a specific value of the pressure.
Comparison table of 3 devices including: Pressure gauge, pressure sensor and pressure switch:
| Criteria | Pressure Gauges | Pressure sensors | Pressure Switches |
| Function | Measure and display pressure values in real time | Measure and convert pressure into electrical or analog signals. | Open or close an electrical circuit when the pressure is at a specific level. |
| Principle of operation | Use mechanical or electronic. | Use the sensor to measure the pressure force and convert it into an electrical or analog signal. | Uses mechanics or electronics to open or close a circuit when the pressure reaches a set level. |
| Type of pressure being measured | Static pressure or dynamic pressure. | Static pressure or dynamic pressure. | Static pressure or dynamic pressure. |
| Unit of measure | Usually psi, bar, kPa, mmHg, etc. | Usually psi, bar, kPa, mmHg, etc. | Usually psi, bar, kPa, mmHg, etc. |
| Accuracy | Varies depending on type and range | Generally more accurate than pressure gauges | Generally less accurate than pressure sensors |
| Expense | Cheaper than pressure sensors and pressure switches | Usually more expensive than pressure gauges but cheaper than pressure switches | Generally the most expensive of the three types of equipment |
| Application | Air conditioning and refrigeration.
Industry and process.
Oil and gas. | Automotive and industrial.
Measurement and control system.
Oil and gas. | Ventilation and air conditioning system.
Industry and process.
Manage pressure in the system. |
6. Brands providing popular pressure measuring and testing equipment on the market
Thương hiệu Autosigma
The Autosigma pressure tester has the following advantages:- High accuracy: Autosigma pressure tester can measure pressure with high accuracy.
- Easy to use: The Autosigma pressure tester is easy to use and does not require extensive training.
- Affordable: Autosigma pressure test kits are affordable and suitable for many budgets.
The Autosigma Pressure Tester is a valuable tool for measuring the pressure of liquids or gases. It can be used in many different applications and provides many benefits to users.
Siemens brand
Siemens is a global electrical and electronics technology group that represents technical achievements, innovation, quality, reliability and internationality. With a history of more than 165 years of establishment, operations in more than 200 countries and more than 25 years of joining Vietnam, Siemens has a solid foothold and is trusted globally.
Some advantages of Siemens pressure measuring equipment:
- Easy to use
- Durable
- High precision
- Good product quality
- Origin from Germany
Epilogue
In case you need to learn, need technical advice and order a Pressure Tester, please contact Amazen immediately via:
Hotline: 0934 399 068 - Sales: 0938 072 058
Email: amazen@amazen.com.vn
With a team of highly specialized technical support and sales consultants, our company is confident that it will bring customers the best purchasing experience.
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