AIR PRESSURE GAUGE | PM-E.VN

What Is an Air Pressure Gauge?

An Air Pressure Gauge is a device used to measure and display air pressure in compressed air systems, air compressors, gas tanks, and industrial air pipelines.

The gauge helps operators monitor system pressure to ensure stable performance, operational safety, and protection against overpressure conditions.

Air pressure gauges are commonly used in:

• Air compressor systems
• Mechanical factories
• Automated production lines
• Industrial pneumatic systems
• Electronics manufacturing plants
• HVAC systems
• Pneumatic equipment

What Is Compressed Air?

Compressed air is a source of energy created by compressing air or gas under high pressure to power industrial equipment and pneumatic systems.

A compressed air system typically includes:

• Air compressors
• Air storage tanks
• Air pipelines
• Control valves
• Pneumatic cylinders
• Pressure measuring devices

Compressed air is widely applied in:

• Mechanical engineering
• Dentistry
• Construction
• Mining
• Textile industries
• Food processing
• Industrial automation

Key Features of Air Pressure Gauges

Air pressure gauges are widely used because of the following advantages:

• Accurate and stable pressure measurement
• Rugged and durable construction
• Excellent vibration and shock resistance
• Easy installation and maintenance
• Wide range of sizes and pressure ranges
• Stable performance in industrial environments
• Available in various connection types and materials
• Suitable for air, steam, and industrial gas applications

The device allows real-time monitoring of compressed air pressure, ensuring system safety and efficiency.

Technical Specifications

Dial Sizes

• 63 mm
• 80 mm
• 100 mm
• 160 mm

Case Materials

• Stainless Steel 304
• Stainless Steel 316

Thread Sizes

• 1/4”
• 3/8”
• 1/2”
• 3/4”
• 1”
• 1-1/4”

Connection Types

• Threaded connection
• Flanged connection

Mounting Styles

• Bottom mount
• Back mount
• Offset back mount

Gauge Types

• Liquid-filled
• Dry type

Protection Ratings

• IP65
• IP67
• IP68

Accuracy Classes

• Class 1.0
• Class 1.6
• Class 2.5

Working Pressure Range

• 2 bar to 40 bar
• Or customized according to system requirements

Operating Temperature

• Up to 180°C

Suitable Media

• Compressed air
• Steam
• Industrial gases

Pressure Units Used in Air Pressure Gauges

Compressed air pressure gauges commonly use the following units:

• PSI
• Bar
• MPa
• kPa

Among them:

• PSI (Pounds per Square Inch) is the most common unit used in industrial pneumatic systems.

For example:

• An air compressor rated at 125 PSI means the system can generate 125 pounds of air pressure per square inch.

Construction of an Air Pressure Gauge

An air pressure gauge consists of the following main components:

Gauge Case

Made from materials such as:

• Stainless steel
• Brass
• Engineering plastic

The case protects the internal mechanism from external environmental conditions.

Dial Face

Displays pressure values with clear graduation markings for easy reading.

Pointer Needle

Indicates the measured pressure value on the dial.

Mechanical Movement

Transfers movement from the Bourdon tube to the pointer.

Socket Connection

The connection point between the gauge and the compressed air system.

Protective Lens

Usually made of reinforced glass to improve impact resistance.

Bourdon Tube

This is the most important component that converts air pressure into mechanical movement.

Working Principle

When air pressure inside the system increases, pressure acts on the Bourdon tube inside the gauge.

The Bourdon tube deforms and transfers movement to the mechanical mechanism, causing the pointer to rotate across the dial.

Operators can easily monitor the actual pressure value of the compressed air system through the gauge display.

Industrial Applications

Air pressure gauges are widely used in:

• Air compressors
• Industrial pneumatic systems
• Mechanical factories
• Electronics manufacturing plants
• Packaging lines
• Agricultural processing systems
• Textile factories
• Paper mills
• Boilers
• Pressure vessels
• Pneumatic presses
• HVAC systems

The device helps:

• Monitor air pressure
• Supervise system performance
• Prevent overpressure conditions
• Improve operational safety
• Reduce explosion risks

Types of Air Pressure Gauges

Liquid-Filled Air Pressure Gauge

Liquid-filled gauges contain Glycerin oil inside the case to:

• Reduce vibration
• Protect the internal mechanism
• Improve pointer stability
• Increase measurement accuracy

Advantages include:

• Suitable for high vibration environments
• Prevents moisture condensation
• Resistant to freezing in cold environments

This type is ideal for air compressors and industrial piping systems.

Dry Type Air Pressure Gauge

Dry gauges are suitable for:

• Stable environments
• Low vibration conditions
• Standard operating applications

Main advantages:

• Lower cost
• Easy replacement
• Simple construction

However, in high vibration or high-temperature environments, dry gauges may experience:

• Moisture condensation
• Reduced visibility
• Shorter service life

PM-E.VN – Trusted Supplier of Pressure Gauges in Vietnam

PM-E.VN – Phuc Minh Engineering specializes in supplying pressure gauges, industrial valves, and instrumentation equipment for industrial systems throughout Vietnam.

Our products are imported directly from Japan, Korea, and Europe with full CO-CQ certification.

We distribute products from reputable brands such as:

• YAMAMOTO KEIKI
• WIKA
• WISE

Why Choose PM-E.VN?

• Genuine imported products
• Full CO-CQ documentation
• Competitive pricing for projects and distributors
• Professional technical support
• Wide range of pressure ranges and connection options
• Fast nationwide delivery
• Application-focused consultation

Our engineering team is always ready to help customers select the most suitable pressure measurement solutions for compressed air systems and industrial applications.

Related Products

• Liquid-filled pressure gauges
• Stainless steel pressure gauges
• Vacuum pressure gauges
• Low pressure mbar gauges
• Differential pressure gauges
• Water pressure gauges
• Diaphragm pressure gauges
• Compound pressure gauges
• Industrial thermometers

Contact Us for Consultation & Quotation

📧 Email: info@pm-e.vn
☎ Hotline: 0902 720 814 – 0907 450 506 – 0902 601 875
🌐 www.pm-e.vn

PM-E.VN is committed to supplying high-quality air pressure gauges that meet industrial standards for compressed air systems, HVAC systems, and industrial manufacturing plants.