Pressure Gauge

Accurate pressure matters more than most people realize. A failed pressure gauge can shut down your system fast.
Here you’ll discover industrial pressure gauges for gas, liquid and steam, from general process to hydraulic and boiler use.
On this page, we help you choose the right pressure gauge range, connection and type so your equipment runs safely and reliably.

What Is a Pressure Gauge?

Pressure Gauge Definition & Working Principle

A pressure gauge is a simple tool that shows how hard a gas, liquid, or steam pushes inside your system.
It turns that invisible pressure into a clear reading, using a pointer on a dial or a digital display.
Most industrial pressure gauges use an elastic Bourdon tube or diaphragm; when pressure rises, it moves, and the movement drives the indicator you see.
You glance at it, and instantly know if pumps, pipelines, or compressors are running safely or drifting into danger.

Gauge Pressure vs Absolute & Differential Pressure

Here’s where many users get confused; the pressure gauge can show different “kinds” of pressure, and they are not the same.
Gauge pressure compares the process pressure to the air around us, so it reads zero when your line is open to atmosphere.
Absolute pressure uses a sealed vacuum as its reference, so it is rock steady for vacuum, lab, or aerospace work.
Differential pressure gauges measure the difference between two points, so they shine on filters, cleanrooms, and flow lines where small drops really matter.

Types of Pressure Gauges We Offer

Our pressure gauges all read pressure, but they do it in different ways and suit very different jobs.
Here we keep things simple, so you can match each type to your own line, tank, or filter without getting lost in jargon.

Industrial Bourdon Tube Pressure Gauge

The Bourdon tube pressure gauge is the classic workhorse; inside it, a curved metal tube straightens as pressure climbs.
That tiny motion moves gears, then a pointer, so you get a clear analog reading at a glance, even from a distance.

Best when you need:

• · Medium to high pressure ranges for gas, liquid, or steam lines.

• · Rugged stainless steel or brass construction that handles tough plant conditions.

• · A lowcost, reliable gauge for compressors, pumps, hydraulic or general industrial systems.

Diaphragm & Capsule Pressure Gauge for Low or Corrosive Pressure

Diaphragm pressure gauges use a thin flexible diaphragm; it deflects as pressure changes and drives the pointer or sensor.
They love dirty, viscous, or corrosive media, because the diaphragm separates your process from the internal mechanism.

Capsule pressure gauges stack two corrugated diaphragms; they react to very small gas pressures and tiny changes.
You pick them when you monitor lowpressure air, ventilation lines, or delicate lab gases where every millibar counts.

Quick comparison

Differential Pressure Gauge for Filtration & Flow

Differential pressure gauges do something unique; they compare two pressures instead of just one.
Inside, a moving element balances the highside and lowside pressure, and its travel shows the difference only.

You watch that difference to see if a filter is clogging, a cleanroom is staying positive, or a heat exchanger is fouling.
It lets maintenance teams act early, before energy use spikes or product quality slips because of unnoticed pressure loss.

Typical spots where they shine

• · Filter housings and dust collectors to track filter loading.

• · Flow lines where pressure drop is used as a flow indicator.

• · Pressurized tanks where level is inferred from differential head.

Digital Pressure Gauge & Test Gauge

A digital pressure gauge feels different the moment you see it; numbers replace a pointer, and accuracy jumps.
Inside, an electronic sensor turns pressure into an electrical signal, then the electronics show it on an LCD or LED screen.

These digital and test gauges are ideal when you need tight calibration, data logging, or quick field checks on other gauges.
We use them for hydraulic test stands, pump startups, and troubleshooting days, when every decimal of pressure really matters.

Why teams reach for digital pressure gauges

• · Higher accuracy and stable readings, even at low ranges.

• · Easy unit switching between bar, psi, kPa, or inH₂O.

• · Extra features like min/max capture, alarms, or logging that help during commissioning and audits.

Pressure Gauge Applications by Industry

Pressure gauges show up almost everywhere, from quiet boiler rooms to harsh chemical plants.
Here we focus on two demanding areas, where safe pressure control really protects people and equipment.

Water, HVAC & Boiler Pressure Gauge Solutions

Water and HVAC systems live or die by stable pressure; one bad reading can mean leaks, noise, or even burst lines.
In chilled water and heating loops, gauges help you see pump performance, air pockets, and pressure drops across coils.

For building HVAC and clean air systems, lowpressure gauges or manometerstyle devices track duct pressure and filter loading.
It becomes easy to spot dirty filters early, keep fans efficient, and hold the right airflow in each zone.

Boilers need special temp and pressure gauges so operators see steam pressure and water temperature at a glance.
These combined gauges help prevent dangerous overpressure events while keeping heating systems in their best efficiency window.

Typical uses in water / HVAC / boilers

• · Water tank and line pressure monitoring in pump rooms.

• · Sprinkler and fire systems where code requires clear pressure indication.

• · Boiler temperature and pressure checks to avoid dryfire and overpressure.

Food, Chemical & Sanitary Pressure Gauge

In food plants, pressure gauges must be clean, smooth, and easy to wash; bacteria cannot find a place to hide.
Sanitary pressure gauges often use 316L stainless steel cases and connections, plus polished surfaces for strict hygiene.

They handle hightemperature washdowns, steam sterilization, and aggressive cleaning agents without peeling or rusting.
Many pair the gauge with a diaphragm seal, so product never touches the measuring mechanism yet readings stay accurate.

Chemical industry gauges face another challenge; they must survive corrosive media, fumes, and sometimes high vibration.
Engineers choose stainless steel or special coatings like PTFE or Tantalum when the process fluid would quickly attack normal metals.

Where these sanitary and chemical gauges are used

• · Food and beverage lines, including dairies, breweries, and filling machines.

• · Pharmaceutical reactors and sterile utilities that demand cleanable, crevicefree designs.

• · Chemical reactors, wastewater treatment, and petrochemical units handling aggressive liquids or vapors.

How to Choose the Right Pressure Gauge

Choosing a pressure gauge is easier when you break the decision into a few clear steps.
You look at how much pressure you need to see, what the medium is, and how the gauge will be mounted on the system.

Selecting Pressure Range, Accuracy & Dial Size

You never want the gauge working right at its limit; most engineers keep normal pressure below about 75% of full scale to avoid fatigue.
Pick a range where your usual operating pressure sits in the middle third of the dial, so the pointer lands in the “sweet spot” for best reading.

Accuracy depends on how critical the measurement is; test gauges may need 0.25% or 0.1% of full scale, while general plant checks often live happily around 1–2%.
If operators must read the gauge from a distance or make fine adjustments, choose a larger dial size so numbers and gradations stay clear.

Quick guide: range and accuracy

Process Media, Materials & Protection

The medium tells you what the wetted parts must survive; clean air is easy, but hot chemicals or slurry are not.
For water and noncorrosive fluids, brass or standard stainless steel works well, while aggressive chemicals usually demand full stainless or special alloys.

If the line vibrates or pressure pulses, a liquidfilled pressure gauge helps; it damps shocks and keeps the pointer steady.
Where media can clog small passages, we often add a diaphragm seal, so the gauge sees only a clean fill fluid, not thick product.

Media–material checklist

• · Clean gas / water: brass or 304/316 stainless case and socket.

• · Corrosive chemicals: 316 stainless, Monel, or Inconel elements, often with PTFE or Tantalum lining.

• · Dirty or viscous media: diaphragm seals, larger passages, and liquidfilled cases for longer life.

Connection, Mounting & Units

Connections must match both regional standards and the way the gauge will sit; in North America, NPT threads are common, while many other regions use G/BSP.
You check size, thread type, and sealing method so the gauge installs easily and stays leaktight over time.

Mounting style affects readability; a lower mount suits vertical piping, while a back mount sits neatly in panels or frontflange assemblies.
For remote or hardtoreach spots, panel or surface mounts keep the dial where operators can see it without climbing or bending.

Units matter for operators and paperwork; psi and bar dominate industry, while kPa, Torr, mmHg, or inches of water appear in labs and HVAC work.
Pick the unit system your team already uses, and if you mix systems, keep a reliable conversion chart handy to avoid mistakes.

Pressure Gauge FAQs

Here are straight answers to the questions people ask most before they pick or replace a pressure gauge.
Use them as a quick check so you avoid common mistakes and keep your system safer and easier to run.

What Is the Primary Function of a Pressure Gauge?

A pressure gauge shows how much pressure sits inside your system at a specific point in time.
It turns invisible force in a pipe, tank, or line into a clear value people can read and act on.

That reading helps you keep equipment inside safe limits so pumps, boilers, compressors, and valves do not run overloaded.
It also gives a fast way to spot leaks, blockages, and failing components before they cause damage or downtime.

Think of it as your system’s “vital sign”

• · Shows if pressure is too low to do the job.

• · Warns when pressure creeps toward a dangerous level.

• · Helps you finetune performance during startup or troubleshooting.

How Often Should a Pressure Gauge Be Calibrated or Replaced?

How often you calibrate depends on how critical the reading is and how hard the gauge’s life feels.
For normal plant service, many teams check accuracy every 12 months, but heavy vibration or high cycles may require shorter intervals.

If a gauge handles safetyrelated pressure, tight quality specs, or acts as a test reference, people often calibrate it every 3–6 months instead.
Any time a gauge suffers a hard hit, overpressure, or obvious pointer jump, it should be checked or swapped right away.

Consider replacing the gauge when you see:

• · Fogged or cracked window, faded dial, or stuck pointer.

• · Obvious dented case, leaks at the connection, or rattling sound when moved.

• · Readings that no longer match a known good reference, even after recalibration.

When Do I Need a Oil-Filled Pressure Gauge?

You bring in a oil- filled pressure gauge when the application shakes, pulses, or lives in a harsh spot.
Inside the case, filling fluid cushions the movement so the pointer stays steadier, and internal parts wear more slowly.

It is a good fit on pumps, hydraulic power units, mobile machines, compressors, or any line that cycles pressure fast.
The fill also helps protect against moisture and dust, so the gauge survives outdoor or washdown environments longer.

Choose oil filled if your system has:

• · Strong vibration or hammering from valves and pistons.

• · Fast pressure spikes that make a dry gauge needle bounce.

• · Outdoor exposure, splashing, or frequent cleaning.

Should I Use an Analog or Digital Pressure Gauge?

Both work, but they shine in different situations, so it helps to think about how people will use the reading.
An analog gauge is simple, rugged, and easy to glance at; a quick look shows if you are “in the green” or near a red line.

Digital pressure gauges show a precise number, often to several decimal places, so they fit calibration, testing, and documentation work.
They can offer extra features like peak capture, unit switching, and data logging, which makes troubleshooting and reports easier.

Fast comparison

Why Choose Our Pressure Gauges?

When you pick a pressure gauge, you are really choosing how much you trust your system every day.
We build our gauges so they stay readable, dependable, and easy to integrate, even when the process runs 24/7.

Reliable IndustrialGrade Pressure Gauge Manufacturer

We focus on industrialgrade design, so each gauge is built for realworld conditions, not just a lab bench.
They handle vibration, temperature swings, and long operating hours, so your team spends less time swapping failed gauges.

Every series goes through strict inspection, from the sensing element to the case seal, so accuracy and leaktightness stay consistent across batches.
It means you can standardize across your plant and know replacements will behave the same way as the originals.

What you get from an industrialgrade supplier

• · Stable readings over the full life cycle, not just in the first months.

• · Material options for water, steam, oil, gas, and aggressive chemicals.

• · Configurations that match common standards, so installation on existing lines stays simple.

Fast Support, Customization & Global Service

We understand your system is unique, so the team helps size ranges, pick materials, and choose mounting that fits your exact job.
If you need special dials, logos, units, or electrical options, customization can turn a standard gauge into your ideal fit.

Global logistics and multilanguage support mean it is easier to roll out the same gauge platform across different plants and regions.
You get quick replies on quotes, drawings, and technical questions, so projects move faster and maintenance teams are not left waiting.

Service advantages that matter daytoday

• · Fast response on sizing questions and crossreference of existing part numbers.

• · Support for OEM and project orders, from samples to largevolume runs.

• · Help for aftersales issues, including selection tweaks when your process changes later.