Introduction: The Important Role of Pressure Gauges in Industrial Automation
Pressure gauges are essential components in various industrial applications, ensuring that production processes operate smoothly and safely. Whether you are working with hydraulic systems, pneumatic systems, or any other system where pressure is a critical variable, having accurate and reliable pressure gauges is crucial. These instruments are used to monitor and measure the pressure of gases and liquids, providing vital data to prevent equipment failures, ensure product quality, and maintain operational safety.
The pressure gauge plays a vital role in pressure monitoring within today's pneumatic industry. It usually serves as an auxiliary and monitoring component for pneumatic FRL units to help verify whether the FRl filter is functioning properly and allows for monitoring and adjusting the output pressure of the FRL regulator.A pressure gauge should also be installed at the air supply inlet of solenoid valve to monitor whether the incoming air pressure meets the control requirements.
In addition, pneumatic pressure gauges are essential for preventive maintenance and ensuring the long-term stability of pneumatic air operated systems.
Common types of pressure gauge
There are various types of pressure gauges, including pressure sensors, digital pressure gauges, diaphragm pressure gauges, and hydraulic gauges — each designed for specific purposes and suitable for different industrial environments.
Bourdon Tube Pressure Gauge:
This is the most common type of pressure gauge. It consists of a curved tube that tends to straighten as pressure increases. This motion drives a pointer on the dial to indicate the pressure level. Bourdon tube pressure gauges are highly reliable for general pneumatic industry applications.
Diaphragm Pressure Gauge:
These gauges use a flexible diaphragm that deforms when pressure is applied. The amount of deformation is then converted into a pressure reading. Diaphragm pressure gauges are particularly suitable for low-pressure measurements and are often used in environments where the medium may be corrosive.
Digital Pressure Gauge:
Digital pressure gauges use advanced electronic technology to convert pressure into electrical signals and display the readings on a screen. These gauges offer high accuracy and can record data over time, making them ideal for applications requiring precise control and monitoring.
Pressure Sensor:
Specifically designed to measure atmospheric pressure, these sensors are ideal for weather monitoring and altitude measurement.
Accuracy and precision: choose by industry
Bourdon Tube Pressure Gauge: In many pneumatic industrial applications, this type of pressure gauge offers an accuracy ranging from 0.5% to 2% of full scale, which is sufficient to meet the needs of most industrial uses.
Digital Pressure Gauge: These instruments typically provide an accuracy within 0.1% of full scale, making them more suitable for high-precision applications such as laboratory work or sensitive manufacturing processes.
Diaphragm Pressure Gauge: Diaphragm pressure gauges are better suited for use in harsh environments, performing especially well in low-pressure applications.
In the pneumatic industry, Bourdon tube pressure gauges are widely used because they are both economical and practical, with the added advantage of easy maintenance. Even in harsh industrial environments such as high temperature, humidity, dust, or vibration, they can operate stably and remain reliable, making them highly suitable for the pressure measurement requirements of pneumatic systems.
Safety and durability: hope in industry
Bourdon Tube Pressure Gauge: This type of pressure gauge features a metal housing that can withstand industrial environments with vibration and temperature fluctuations. It has a threaded connection at the bottom that allows for direct attachment to pressure lines, making installation and maintenance very convenient.
Digital Pressure Gauge: Since this type of gauge has fewer moving parts, it can be susceptible to wear when exposed to mechanical vibrations. It also requires regular battery replacement or a reliable power supply.
Diaphragm Pressure Gauge: With a well-sealed design, diaphragm pressure gauges offer excellent resistance to corrosive media.
Cost analysis: comparison of initial investment and operation and maintenance
• Bourdon Tube Pressure Gauge: This type of pressure gauge has a simple structure, contains few electronic components, and features a robust outer casing that is not easily damaged, making it the most economical and affordable choice.
• Digital Pressure Gauge: Although this type of pressure gauge has a higher initial cost, its maintenance focuses on maintaining high accuracy, which helps reduce the risk of costly measurement errors.
• Diaphragm Pressure Gauge: While generally more expensive than Bourdon tube gauges, diaphragm pressure gauges can be more cost-effective than digital ones in certain applications, especially when dealing with corrosive media.
Use Cases: Choosing the Right Instrument for Different Scenarios
• High-Precision Applications: In industries such as pharmaceuticals or semiconductor manufacturing, digital pressure gauges with high accuracy and data recording capabilities are typically the best choice.
• Harsh Environments: For applications in oil and gas or chemical processing, where instruments are exposed to extreme temperatures, vibration, and corrosive substances, diaphragm pressure gauges offer the necessary durability and reliability.
• Cost-Sensitive Applications: When budget constraints are a major consideration—such as in general manufacturing or pneumatic systems—Bourdon tube pressure gauges provide sufficient accuracy along with robust durability.
• Remote Monitoring: For applications that require remote monitoring, pressure transmitters are the ideal choice, as they can transmit data over long distances.
Convenience: Readability of installed interface pointers
Bourdon Tube Pressure Gauge:
This type of gauge can be directly screwed into the pressure measurement point of a pipeline or container through a threaded connection, making installation simple. Common connection types include G1/2, G1/4, and NPT 1/2 threads. The pointer clearly indicates pressure trends, and the large dial ensures easy readability from almost any angle.
Digital Pressure Gauge:
Installation is slightly more complex than that of a purely mechanical Bourdon tube gauge, as it also requires additional electrical wiring. The sensor section typically comes with standard interfaces such as M20×1.5 or G1/2. Pressure values are displayed digitally, offering clearer and more convenient readings.
Diaphragm Pressure Gauge:
A diaphragm pressure gauge consists of a lower diaphragm isolator and an upper pressure gauge head. It offers flexible connection options such as threaded, flanged, or clamped types. Readings can be displayed using either a Bourdon tube head or a digital display, depending on specific requirements.
If you are looking for an economical, reliable, and quick monitoring solution in clean media environments without special requirements, the Bourdon tube pressure gauge is the best choice.If you require high precision, data recording, and system integration, the digital pressure gauge is more suitable—though it requires power supply and wiring.For complex or corrosive media, the diaphragm pressure gauge is the most appropriate option.
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