In any industrial environment, whether hydraulic, pneumatic, or some other type of machinery, monitoring pressure is essential. Pressure shows (to some degree) how well machinery will function, its accuracy, and how long it will last. One of the most common methods of actively monitoring pressure is through the use of a Bourdon tube pressure gauge. Bourdon tube pressure gauges are simple, reliable, and have been in use for more than 100 years; it is no wonder that they are a popular option.
In this blog, I will explain: what Bourdon tube pressure gauges are, and why they’re important in different industrial environments, as well as, discussing a few trusted brands to evaluate when selecting a Bourdon tube pressure gauge (such as, WIKA, Baumer, Mass, H-Guru, and ZIPL). These brands offer credibility and reliability for their products. If you work in any type of industrial environment, understanding Bourdon tube pressure gauges and their accuracies is going to help keep equipment running smoothly for longer periods of time.
What is a Bourdon Tube Pressure Gauge?
- A Bourdon tube pressure gauge is a great way to measure pressure in liquid and gas applications, and is based on a coiled curved metal tube known as a Bourdon tube. When pressure forces the tube, it bends or straightens out a small amount. This small amount of movement caused by pressure is transferred to a pointer on a dial and is almost impossible to miss.
- The only catch is this is all done with mechanical principles, and there are no batteries or electric power needed. The benefits of a Bourdon tube is their simplified design and ruggedness, making them a great instrument choice for consistent industrial processes when pressure is crucial for performance.
Why Industrial Systems Need Bourdon Tube Gauges
Bourdon tube gauges are really valuable for several reasons.
- First and foremost, they help without accidents caused by overpressure and therefore safety.
- They contribute to accuracy by providing real-time pressure readings, which is key for smooth operations.
- They help protect items like pumps and valves from damage.
- Finally, they act as good indicators for problems like leaks or sudden pressure drops.
Features and Benefits of Bourdon Tube Gauges
Durable: Bourdon tube gauges are considered to be rugged instruments made for use in extreme industrial conditions, including high levels of vibration or temperature, and exposure to both dust and moisture. These conditions can quickly cause your gauges to fail if they are not built for durability. Bourdon tube gauges will not frequently fail in these types of environments because of the durability associated with their design. A durable gauge will last for years without replacement, keeping your equipment safe.
Accuracy: Bourdon tube gauges are generally very accurate devices for measuring pressure. Many gauges can measure pressures to an accuracy of ±1% of the full scale of the device, meaning that the measurement you obtain is close to the real actual pressure. This level of accuracy is needed for fluid systems including hydraulic or pneumatic systems, and cooling systems that help reduce costly mistakes that could lead to damages to your equipment.
User-Friendly: One of the first things you’ll notice about Bourdon tube gauges is how functional they are in terms of usability. The dial and pointer are easy to read and allow you to visually determine the amount of pressure quickly. Operators will not need special training or electronic devices to understand the readings, which means monitoring the pressure is merely simplified. Additionally, this minimized the potential for human errors.
Versatile: Bourdon tube gauges can be used to measure a number of applications such as high and low pressures, vacuum, and differential pressures. This allows the gauges to be used successfully in a variety of machines, including hydraulic presses, pneumatic tools, and coolant systems.
Low Maintenance: Finally, Bourdon tube gauges require minimal maintenance. The mechanical design doesn’t depend on electrical functions, which results in fewer breakable elements. Generally, all the operator will need to do is keep the gauge clean and calibrate it periodically, saving them even more time and money.
How Do They Work?
The Components of a Bourdon Tube Pressure Gauge
- While Bourdon tube pressure gauges may appear simple from the outside, there are many components working together to give accurate pressure readings.
- For instance, there is the Bourdon tube itself, which is the sensing element. Think of a curved hollow metal tube that bends when you apply pressure. When you apply pressure to the Bourdon tube, it will start to straighten.
- The amount of straightening tends to correlate to the pressure inside the tube, meaning that the Bourdon tube is needed to surf any change in pressure.
- Then we have the linkage. The Bourdon tube reflects very small movement and the linkage transfers the movement of the Bourdon tube to the pointer on the gauge.
- The linkage is significant so it can amplify the small movement of the Bourdon tube into visible movement on the dial. The linkages have a very specific design which is important to allow for smooth or precise movement.
Applications of Bourdon Tube Gauges
They are widely used in:
- Hydraulic Systems: For pumps, valves, and actuators.
- Pneumatic Systems: For compressed air systems and tools.
- Coolant Systems: Ensures proper coolant flow and prevents overheating.
- Maintenance & Testing: Helps check if systems are working correctly.
Top Brands and Features
Here’s a quick comparison of the top brands we deal in:
| Brand | Features & Benefits | Ideal For |
| WIKA | High accuracy, durable, globally recognized | Heavy-duty industrial systems |
| Baumer | Compact design, precise, long-lasting | Modern machinery, precise work |
| Mass | Reliable in tough environments | Heavy industrial use |
| H-Guru | Affordable, dependable | Small & medium setups |
| ZIPL | Vibration-resistant, clear dials | Systems with vibrations & shocks |
How to Choose the Right Gauge
Points to consider:
- Pressure Range: Must handle your system’s maximum pressure.
- Connection Size: Match pipes or hydraulic lines.
- Material: Stainless steel for corrosive/wet environments.
- Accuracy: Higher accuracy for precise operations.
- Dial Size: Bigger dials are easier to read.
- Extra Features: Liquid filling, safety glass, or vibration resistance.
Installation and Maintenance Tips
- Mount vertically, away from heavy vibrations.
- Tighten fittings properly—don’t over-tighten.
- Calibrate regularly to maintain accuracy.
- Keep clean from dust and debris.
- Use snubbers to protect from sudden pressure spikes.
Why Choose Bourdon Tube Gauges Over Digital Gauges
- No Electricity Needed: Works during power outages.
- Durable: Resistant to vibrations and heat.
- Cost-Effective: Lower upfront and maintenance costs.
- Instant Reading: Pointer gives immediate feedback.
Conclusion
Bourdon tube pressure gauges are essential for industrial systems. They:
- Maintain safe pressure levels
- Ensure precise operation
- Protect expensive equipment
- Detect problems early
We deal in high-quality gauges from WIKA, Baumer, Mass, H-Guru, and ZIPL, offering the best options for industrial machinery. Investing in a good Bourdon tube gauge means better safety, accuracy, and long-lasting performance.
