Pressure Gauges

At Hawleys, we make it simple to find the right pressure gauge for your boiler or steam system. Our stainless steel pressure gauges are suitable for a wide range of applications and come in rear and bottom entry options.

Find the right steam or boiler pressure gauge online at Hawleys!

Each gauge is designed to perform in tough conditions and deliver accurate readings to support safe and efficient operation. We've grouped our stainless steel gauges here to help you quickly find what you need and reduce downtime.

Count on Hawleys for reliable boiler parts and practical support—whether you're replacing a single gauge or managing larger system maintenance.

What are steam & boiler pressure gauges?

Pressure gauges for steam and boiler systems are specialised devices that measure and display the pressure levels within steam boilers and associated piping systems. 

They are installed strategically throughout the steam and boiler system, providing visibility into pressure conditions at critical points. So, we can say they play a crucial role in monitoring the pressure conditions in boiler and steam systems, ensuring safe operation and optimal performance.

Stainless steel pressure gauges usually have a robust construction to withstand high temperatures and pressures, which are common in steam and boiler applications. They should be accompanied by a pigtail syphon to protect the pressure gauge from the high media temperature. We manufacture these out of 316L schedule 80 pipes threaded on both ends and bent to the pigtail shape.

They often utilise a Bourdon tube mechanism, consisting of a curved tube straightening under pressure.

About our range of steam & boiler pressure gauges

Pressure gauges are essential for monitoring the performance of boiler systems and ensuring they operate within safe limits. The readings provided help operators track the pressure within the boiler and piping network, allowing them to plan necessary adjustments, maintain optimal pressure levels, and prevent overpressure situations. 

These functions are vital for avoiding system damage and mitigating potential safety hazards.

 Pressure gauges play a critical role in safety monitoring by indicating whether pressure levels are within acceptable ranges, helping to prevent equipment damage or even catastrophic failures. They also assist in regulating and controlling the system by enabling operators to make informed adjustments to valves, dampers, and other components to maintain efficient and safe operation.

Air pressure gauges

Air pressure gauges in steam and boiler systems measure the pressure of air supplied to the combustion chamber. These readings are vital for ensuring proper fuel combustion, regulating airflow, and maintaining safe operating conditions.

They also help optimise system efficiency, prevent overpressure situations, and assist with maintenance planning. By providing real-time feedback on air pressure levels, air pressure gauges support the safe and efficient operation of the system.

Water pressure gauges

Water pressure gauges measure and display water pressure in plumbing systems, water distribution networks, and hydraulic setups. They are typically made from corrosion-resistant materials such as stainless steel, bronze, or brass to withstand constant exposure to water.

Water pressure gauges are available in various types and mounting options, and they are essential for maintaining optimal pressure levels. They also play a key role in detecting leaks, diagnosing system issues, and ensuring reliable operation in residential, commercial, and industrial applications.

Pool filter pressure gauges

Pool filter pressure gauges measure the pressure inside a pool's filtration system. They indicate how clogged or dirty the filter media has become over time due to accumulated debris and contaminants.

Usually installed on the filter tank or valve, pool filter pressure gauges are built to resist exposure to pool chemicals. They provide readings—typically in pounds per square inch (psi)—that help pool owners determine when to clean or backwash the filter. Regular monitoring is essential to maintain optimal filtration efficiency and ensure clean, clear pool water.

Hydraulic pressure gauges

Hydraulic pressure gauges measure and display pressure within hydraulic systems, helping maintain safe and efficient operation. These gauges are engineered to endure high pressures, vibrations, and harsh conditions typical of hydraulic environments.

They deliver accurate, reliable readings, allowing operators to monitor system performance and prevent potential failures. Hydraulic pressure gauges are critical in manufacturing, construction, and aerospace industries, where hydraulic systems are essential for power transmission and control.

Industries and applications

Our stainless steel pressure gauges are used across various industries, including HVAC, manufacturing, food processing, energy, mining, and water treatment. They’re built to operate reliably in challenging conditions, including high-temperature steam, corrosive materials, and high-vibration environments.

Our pressure gauges are suitable for applications other than steam boilers, such as hydraulic systems, water distribution, and industrial control systems. Each gauge is available in various pressure ranges, with calibrated accuracy and durable stainless steel construction for long-term use.

Our gauges support clear and consistent readings in psi or bar, and many models are compatible with data logging systems to improve real-time monitoring and long-term performance tracking.

Installation tips and maintenance for long-term performance

Proper installation and upkeep are essential to ensure your pressure gauges help you maintain a safe and efficient system. 

Always install a pigtail syphon to protect the gauge from direct high-temperature steam for steam and boiler applications. This simple addition helps preserve the internal movement and extend the gauge's lifespan.

Choose filled pressure gauges—such as our liquid-filled pressure gauge options—for environments with high vibration or pulsation, as the internal fluid dampens movement and supports consistent readings.

Regular inspections and calibration checks are recommended to maintain accuracy and compliance. Look for signs of wear, damage, or drift in readings. If your system includes different pressure gauges, ensure each is correctly rated for its specific material, pressure range, and application.

Why choose Hawleys for your boiler pressure gauge needs?

When it comes to reliable, accurate boiler pressure gauges, Hawleys is your trusted partner. We stock an extensive range of pressure gauges built for steam boilers, hot water systems, and other demanding process line applications. Our range is selected for accuracy, durability, and compliance with industry standards.

Our gauges include liquid-filled pressure gauges for vibration resistance and high-temperature steam pressure gauges equipped with pigtail syphons to protect against direct steam exposure. From replacing a faulty gauge to upgrading your system for better performance monitoring, our stock SKU range has something to suit your needs.

We also offer same-day dispatch on in-stock items and free freight on orders over $100. With expert advice, responsive service, and a product range tailored to meet the demands of Australian industries, it’s no wonder Hawleys is a leading name in boiler parts supply.

Accessories and components for accurate pressure measurement

Installing the right accessories is essential to get the most out of your pressure gauge. We supply a full range of supporting components, including filling loops, valves, pigtail syphons, and mounting kits. These parts are designed to enhance accuracy, prolong gauge life, and prevent overpressure from damaging your system.

Most of our gauges use a Bourdon tube mechanism, which is highly reliable under high pressures and common in steam pressure gauge applications. When paired with a syphon and installed correctly, this design ensures accurate pressure measurement even in fluctuating or high-temperature environments.

Whether you're monitoring a boiler’s operation, controlling a process line, or managing pressure across different systems, Hawleys has the right equipment to keep things running smoothly.

Order your boiler pressure gauge from Hawleys today!

At Hawleys, we know that reliable pressure measurement is critical to the safe and efficient operation of your steam boilers and related systems. That’s why we offer a wide selection of high-performance boiler pressure gauges backed by expert advice, fast dispatch, and trusted customer support.

Whether you need a liquid-filled pressure gauge for a high-vibration environment or a high-temperature steam pressure gauge for demanding boiler conditions, we have the right solution. Our range is built for accuracy, durability, and compliance so you can shop confidently.

Explore our online collection today, or contact our team to find the right gauge, accessory, or component for your setup. We’re here to help you finish the job quickly, safely, and confidently.

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FAQs

  • What is a pressure gauge, and what is its primary function in industrial and mechanical applications?

    A pressure gauge is an instrument used to measure and display the pressure of a fluid (liquid or gas) in a closed system. Its primary function is to provide real-time information about the pressure, enabling operators to monitor and control processes effectively.

  • What is a bourdon gauge?

    The Bourdon pressure gauge is the most common type. It is a mechanical gauge that uses a curved tube that straightens under pressure, allowing you to see the readings on a dial.

    Bourdon pressure gauges are known for:

    • High accuracy—These gauges are highly sensitive to pressure changes, which allows them to provide readings within 2% of the full scale.
    • Vibration and corrosion resistance—Bourdon pressure gauges resist corrosion and vibration, making them suitable for environments where these can be expected.
    • Affordability—These gauges are made for various applications, making them an affordable solution to many engineering needs.
    • Ease of use—Bourdon pressure gauges are easy to install, the readings on the dial are simple to understand, and they require minimal maintenance.

  • What is the difference between dry and liquid-filled pressure gauges?

    Dry pressure gauges are sealed and contain air. They are less complex than liquid-filled gauges and typically more affordable. However, they are not as accurate and require regular calibration. Liquid-filled gauges are filled with oil or glycerine that lubricates movement, making them more accurate. They are also more resistant to vibrations and can withstand bigger temperature changes. At Hawleys, all of our bourdon pressure gauges are glycerin-filled.

  • Why are pressure gauges made from stainless steel?

    The housing material of the pressure gauge is another key factor contributing to its longevity and performance.

    If the housing for our gauges is made of stainless steel because this material is:

    • Highly resistant to corrosion
    • Strong, robust, and durable material that can keep its structural integrity even in challenging conditions. These characteristics also give stainless steel pressure gauges a long life span!
    • Labelled as "minimal maintenance" due to its corrosion resistance and durability when compared to other material types.

  • What is the difference between rear and bottom entry pressure gauges?

    The difference between rear and bottom entry pressure gauges lies in how they are installed and where the pressure connection is located:

    Rear Entry Pressure Gauge:

    Rear entry pressure gauges have their pressure connection located at the back of the gauge.

    They are typically installed so that the gauge face (the part displaying pressure readings) is easily visible from the front or top of the gauge.

    Rear entry gauges are commonly used in applications where the pressure source is behind the gauge, allowing for a straightforward installation.

    Bottom Entry Pressure Gauge:

    Bottom entry pressure gauges have their pressure connection located at the bottom of the gauge.

    They are installed so that the gauge face is typically positioned horizontally or vertically, with the pressure connection facing downwards.

    Bottom entry gauges are often used when the pressure source is beneath the gauge or when space limitations or installation requirements dictate a specific orientation.

  • What are the different types of pressure gauges available?

    • Bourdon Tube Gauges: They operate using a curved tube (Bourdon tube) that straightens under pressure, which is then converted into mechanical movement to indicate pressure on a dial.
    • Diaphragm Gauges: These gauges use a flexible diaphragm that deflects under pressure to measure changes in pressure. They are often used in applications where the pressure is relatively low or where vibration resistance is required.
    • Capsule Gauges: These gauges use a flexible capsule instead of a diaphragm to measure pressure changes. They are typically used in low-pressure applications.
    • Digital Gauges: Electronic sensors measure pressure and display the reading digitally on a screen. They offer high accuracy and often provide additional features like data logging and remote monitoring.
    • Differential Pressure Gauges: These can measure the difference in pressure between two points in a system. They are commonly used in applications such as flow measurement and filter monitoring.
    • Absolute Pressure Gauges: Can measure pressure relative to a perfect vacuum rather than atmospheric pressure. They are often used in scientific and laboratory applications.
    • Sealed Pressure Gauges: Designed to prevent the ingress of contaminants into the gauge mechanism. They are commonly used in harsh environments or applications where cleanliness is essential.

  • Where are pressure gauges commonly used, and what industries benefit from their applications?

    Pressure gauges are commonly used in manufacturing, oil and gas, petrochemicals, pharmaceuticals, HVAC, aerospace, and more. They are essential for monitoring pressure in boilers, pipelines, hydraulic systems, and various mechanical equipment.

  • How do I choose the right type and range of pressure gauge for my specific measurement needs?

    To select the right pressure gauge, consider factors like the pressure range, compatibility with the measured media, accuracy requirements, and environmental conditions. If you are not sure, contact us for a consultation.

  • What is the difference between analog (dial) and digital pressure gauges, and when should I use each type?

    Analog pressure gauges display pressure using a dial and pointer, while digital gauges provide numeric readings on an electronic display. Analog gauges are suitable for quick visual reference, while digital gauges offer precise readings and data-logging capabilities.

  • Are there safety precautions or installation guidelines I should follow when installing pressure gauges in various industrial settings or critical applications?

    Yes, safety precautions and installation guidelines are essential. Pressure gauges should be installed correctly, and safety measures should be taken to prevent overpressure or damage to the gauge. Follow manufacturer recommendations and industry standards.

  • What is the recommended calibration schedule for pressure gauges, and how can I ensure accurate and reliable measurements over time?

    Pressure gauges should be calibrated regularly, typically annually, or as the manufacturer specifies. Calibration ensures accuracy, and reputable calibration services can provide certification.

  • Can pressure gauges be integrated into control systems or data logging for remote monitoring and automation purposes, and what communication options are available?

    Yes, pressure gauges can be integrated into control systems using protocols like 4-20mA or HART for remote monitoring. Digital pressure gauges often have built-in data logging and communication options such as USB or RS-485.

  • What industry standards and certifications may pressure gauges need to meet, and how can I verify compliance for my specific application?

    Pressure gauges may need to meet standards such as ASME B40.100 or DIN EN 837. Verify compliance by checking the gauge's specifications and documentation or consulting with the manufacturer or supplier.

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