Gauges

When you’re working with hydraulic or pneumatic systems, pressure isn’t just a number — it’s the heartbeat of your operation. At Union Hydraulics, we supply dependable hydraulic and pneumatic gauges designed to give you clear, accurate readings so you can protect your equipment, maintain safety, and keep your systems running at peak performance.

Whether you’re monitoring a high-pressure hydraulic circuit on industrial equipment or checking air pressure in a pneumatic line, the right gauge makes all the difference.

Why Pressure Gauges Matter More Than You Think

Pressure gauges do more than display PSI. They help you:

• Detect system overloads before components fail
• Identify pressure drops that signal leaks or restrictions
• Protect pumps, valves, cylinders, and hoses
• Maintain compliance with safety standards
• Troubleshoot performance issues quickly

A reliable gauge acts as your first line of defense against costly downtime.

At Union Hydraulics, we work with technicians, maintenance managers, plant operators, and OEMs who depend on accurate data. We understand how critical even a small pressure deviation can be in real-world applications.

Hydraulic Gauges: Built for High-Pressure Systems

Hydraulic systems operate under significantly higher pressures than pneumatic systems. That means gauges must be built to handle vibration, pulsation, and extreme PSI ranges.

Our hydraulic gauges are designed for:

• High-pressure oil-based systems
• Industrial machinery
• Construction and heavy equipment
• Manufacturing production lines
• Hydraulic power units

You’ll find gauges available in a wide range of pressure ratings — from lower PSI applications up to high-pressure systems used in demanding industrial environments. Options may include glycerin-filled (liquid-filled) gauges to dampen vibration and extend service life, especially in mobile or high-vibration equipment.

If your application experiences pressure spikes or pulsation, we can help you select the right style to ensure long-term accuracy.

Pneumatic Gauges: Clean, Clear, Reliable Air Monitoring

Pneumatic systems typically operate at lower pressures but require precision and consistency. Whether you're monitoring compressed air for automation systems or controlling airflow in equipment, accuracy is still essential.

Our pneumatic gauges are commonly used in:

• Compressed air systems
• Air tools and shop equipment
• Packaging lines
• Automation and control panels
• General industrial air applications

Clear dial faces, accurate graduations, and durable housings ensure you can quickly verify pressure levels at a glance.

What to Look for When Choosing a Gauge

Selecting the right hydraulic or pneumatic gauge depends on more than just PSI range. Here are a few important factors to consider:

1. Pressure Range

Choose a gauge where your normal operating pressure falls in the middle third of the dial. This improves accuracy and extends the life of the gauge.

2. Dial Size

Larger dial faces make readings easier from a distance. Smaller gauges are ideal for compact panels or tight installations.

3. Connection Type & Size

Common connection sizes include 1/8", 1/4", and 1/2" NPT. Make sure the fitting matches your port configuration.

4. Mounting Style

• Bottom mount
• Back mount (center or offset)
• Panel mount

The mounting orientation must match your installation setup.

5. Environment

If the gauge will be exposed to vibration, moisture, temperature swings, or harsh environments, consider liquid-filled or heavy-duty options.

If you're unsure which configuration is right for your system, call Union Hydraulics. We’ll walk through your application with you to make sure you get exactly what you need.

Signs It’s Time to Replace a Pressure Gauge

Pressure gauges are mechanical instruments and do wear out over time. You may need a replacement if you notice:

• Needle not returning to zero
• Fogging inside the lens
• Cracked lens or damaged casing
• Erratic or inconsistent readings
• Corrosion around the connection

Ignoring a faulty gauge can lead to inaccurate diagnostics and potentially unsafe conditions.

Applications We Commonly Support

Union Hydraulics supplies gauges for a wide range of industries and applications, including:

• Hydraulic repair shops
• Manufacturing plants
• Heavy equipment maintenance
• Fleet service operations
• Industrial processing facilities
• Automation integrators

If you’re building a new system or maintaining an existing one, we can supply gauges that align with your pressure requirements and system design.

Why Buy Gauges from Union Hydraulics?

When you purchase from Union Hydraulics, you're not just buying a part — you're getting guidance from professionals who understand fluid power systems inside and out.

We help you:

• Confirm compatibility
• Verify pressure ranges
• Select the proper mounting configuration
• Avoid premature failure
• Reduce downtime

Our team works directly with you to make sure the gauge you install performs reliably in your environment.

If you have any questions about which hydraulic or pneumatic gauge is right for your system, give us a call. We’re happy to help you sort through the options and make a confident decision.

Frequently Asked Questions About Hydraulic & Pneumatic Gauges

What’s the difference between a hydraulic and pneumatic gauge?

Hydraulic gauges are built for higher-pressure oil-based systems, while pneumatic gauges are typically used in lower-pressure compressed air systems. The internal construction and pressure ratings differ to match system demands.

Should I choose a liquid-filled gauge?

Liquid-filled gauges are ideal for applications with vibration or pressure pulsation. They improve readability and extend the lifespan of the gauge.

How accurate are pressure gauges?

Accuracy varies by model, but most industrial gauges offer accuracy ratings suitable for maintenance and operational monitoring. For precision-critical applications, we can help you select higher-accuracy options.

Let’s Make Sure You Get the Right Gauge

Choosing the wrong pressure gauge can lead to inaccurate readings, unnecessary replacements, or even equipment damage. At Union Hydraulics, we take the guesswork out of the process.

If you're unsure which hydraulic or pneumatic gauge you need, call us today. Tell us about your system, your pressure range, and your mounting setup — and we’ll help you get it right the first time.