The quickest way to select the wrong pressure gauge is to ask only two questions:

“What range do you need?” and “What connection size do you need?”

Those details matter, but they are only part of the selection.

A gauge installed on an FRL unit does not face the same conditions as one mounted beside a vibrating compressor. A gauge used on an HVAC water line has different priorities from one installed on hydraulic equipment. And a low cost gauge that works perfectly on a clean air line may be a poor choice where moisture, vibration or higher process temperature is present.

That is where Baumer Utility Pressure Gauges make sense. The range is intended for practical pressure indication across general industrial and utility applications, with multiple dial sizes, case constructions and application focused variants. Baumer's current utility selector covers dial sizes from 40 mm to 250 mm and pressure ranges reaching 400 bar, depending on the selected model.

The important part is not buying the most expensive gauge. It is choosing the construction that actually matches the installation.

What Is a Utility Pressure Gauge?

A utility pressure gauge is a mechanical pressure indicator intended for routine local pressure monitoring on equipment such as pumps, compressors, pneumatic lines, HVAC systems, water systems and industrial machinery.

Most gauges in this Baumer category use the Bourdon tube principle. Pressure entering the gauge causes the curved sensing tube to deform slightly. That mechanical movement is transferred through the internal movement to the pointer, giving a local pressure reading without an electrical power supply.

This independence from power is one reason mechanical gauges remain useful even in highly automated plants. A PLC may receive pressure from a transmitter, but technicians still appreciate being able to look at a pump or air line and immediately see the local pressure.

Why Utility Gauge Selection Matters in Actual Plant Conditions

Pressure gauge problems are often blamed on the gauge after installation, even when the original issue was selection.

For example, a dry gauge may be perfectly suitable on a stable water line. Put the same type beside a compressor with continuous pulsation and the pointer can become difficult to read. Likewise, choosing a very small dial may save space, but it may be uncomfortable to read when the operator stands several metres away.

Before selecting a utility gauge, think about:

• What media will touch the sensing element?
• Is the pressure stable or pulsating?
• Is vibration present?
• What is the normal operating pressure?
• How large should the dial be for comfortable reading?
• Is the installation indoors, outdoors or inside equipment?
• Does the gauge need bottom entry or back entry?
• Is a dry, fillable or liquid filled construction more appropriate?
• What process temperature will reach the gauge?

Answering these questions usually narrows the choice much faster than comparing model numbers alone.

Baumer Utility Pressure Gauge Options

Baumer AAB Utility Pressure Gauge, 40 mm

The AAB is a compact option for installations where panel space or equipment space is limited. Baumer's selector lists AAB as a 40 mm utility pressure gauge with copper alloy wetted material, Class 2.5 accuracy and a measuring range selection extending up to 250 bar depending on configuration.

Technical points to note:

• 40 mm nominal size for AAB
• Accuracy class 2.5
• Copper alloy wetted construction
• Ambient temperature from minus 20°C to plus 65°C
• Process temperature up to 150°C
• Multiple BSP, NPT and BSPT connection possibilities within the AA family
• Pressure, vacuum and selected dual scales are available depending on size and configuration

Where it fits well:

• FRL units
• Pneumatic machines
• Small compressors
• Air lines
• Irrigation equipment
• Compact OEM equipment

Baumer AAH Utility Pressure Gauge, 150 mm

AAH belongs to the same AA utility family, but the larger 150 mm dial changes where it makes sense. Baumer currently lists AAH with copper alloy wetted material, Class 1.6 accuracy and ranges extending up to 400 bar depending on the selected scale.

Technical points to note:

• 150 mm nominal size for AAH
• Accuracy class 1.6
• Copper alloy sensing system
• Process temperature up to 150°C
• Operating pressure recommended at 75% of scale value
• Multiple pressure, vacuum and compound scale options
• Gauge cock, snubber and siphon accessories are referenced in the family datasheet

Where it fits well:

• Utility piping
• Pump stations
• Hydraulic power units
• Water systems
• Large machinery
• Plant services

Baumer ATC SS Case Brass Pressure Gauge, 50 mm

The AT family is a useful step up when the installation needs a stainless steel case and a more rugged construction while retaining copper alloy pressure sensing components.

Baumer's current utility selector lists the ATC variant with a 50 mm dial, copper alloy wetted material, Class 2.5 accuracy and measuring ranges up to approximately 280 bar for this specific size.

Technical points to note:

• ATC nominal size: 50 mm
• Accuracy class 2.5 for the 50 mm size
• AISI 304 stainless steel case
• Copper alloy Bourdon tube and socket
• IP65 protection in the standard family specification
• Dry, fillable or glycerine filled options
• General compliance reference to EN 837 1
• Process temperature up to 150°C for the standard dry version

Where it is commonly used:

• Compressors
• Pumps
• Hydraulic systems
• Pneumatic equipment
• Diesel engines
• Oil and water systems

Baumer AVF HVAC SS Pressure Gauge, 100 mm

The AVF is one of the more application specific products in this group. It is a 100 mm compact case pressure gauge developed around HVAC and clean utility type applications.

Baumer's utility selector lists AVF as a 100 mm gauge with stainless steel wetted material, Class 1.6 accuracy and measuring ranges up to 400 bar depending on configuration.

Technical points to note:

• 100 mm nominal size
• Accuracy ±1.6% FS
• AISI 304 stainless steel case and bezel
• AISI 316L stainless steel Bourdon tube
• AISI 316 stainless steel socket
• IP65 protection
• Standard process temperature up to 180°C
• Dry fillable and glycerine filled options
• Bottom, back and panel mounting arrangements are available within the family

Where it is commonly used:

• Chilled water systems
• HVAC utility piping
• Air handling systems
• Pump skids
• Building services
• Clean utility lines

Baumer BVF ECO SS Pressure Gauge, 100 mm

The BVF is a 100 mm version of Baumer's ECO stainless steel pressure gauge family. It is aimed at buyers who want stainless steel construction without moving into a more elaborate process gauge design.

The current utility selector lists BVF at 100 mm, Class 1.6, with stainless steel wetted material and ranges from approximately 4 to 70 bar.

Technical points to note:

• 100 mm nominal size
• Accuracy ±1.6% FS
• AISI 304 stainless steel case and ring
• AISI 316L stainless steel Bourdon tube
• Welded socket and case construction
• IP65 protection
• Maximum process temperature 200°C
• Pressure, vacuum and compound ranges available within the published range table

Where it is commonly used:

• Clean air systems
• Utility gas lines
• Water services
• Equipment skids
• General plant utilities
• OEM installations

Baumer BVH ECO SS Pressure Gauge, 150 mm

BVH uses the same ECO pressure gauge construction but increases the nominal dial to 150 mm. Baumer currently lists it as Class 1.6 with stainless steel wetted material and a 4 to 70 bar measuring range selection.

Quick Product Selection Guide

The final model still needs to be checked against pressure range, media, connection, mounting and process temperature.

How to Select the Right Utility Pressure Gauge

1. Start With the Normal Operating Pressure

Do not size a gauge so that normal operation sits continuously at the very end of the scale. The AA, AT, AV and BV datasheets generally specify operation around 75% of the scale value, with overpressure capability depending on model and range.

In practice, the operator should be able to see both normal operating pressure and abnormal movement clearly.

2. Match Wetted Material to the Media

For clean air and water, copper alloy gauges may be perfectly adequate. For applications where stainless steel wetted parts are preferred, AV or BV type construction may make more sense.

Selecting stainless steel simply because it sounds better can increase cost without improving the application. Selecting copper alloy where the process is chemically incompatible creates a much bigger problem.

3. Think About Vibration Before Choosing Dry or Filled

If the pointer constantly vibrates, readings become difficult and internal wear can increase.

The AT and AV families provide dry, fillable and glycerine filled options, making them useful when equipment vibration or pulsation needs additional damping.

For stable pressure on a quiet line, a dry gauge may still be the simpler choice.

4. Choose Dial Size for the Person Reading It

A 40 or 50 mm gauge works well directly on compact machinery. A 100 or 150 mm gauge is more comfortable where the reading must be seen from further away.

Do not treat dial size only as a specification. It is an operator visibility decision.

5. Confirm Connection and Mounting

The AA family alone offers bottom entry, back entry, flange mounting and bracket based configurations along with BSP, NPT, BSPT and M20 connection possibilities.

Before ordering, confirm:

• Connection thread
• Connection size
• Bottom or back entry
• Panel mounting requirement
• Available clearance
• Existing replacement dimensions

This is especially important when replacing a gauge already installed on a machine.

Common Mistakes to Avoid

• Choosing a gauge only by price
• Selecting the same pressure range as the normal operating pressure
• Ignoring vibration and pulsation
• Assuming all stainless steel gauges have identical wetted materials
• Choosing a small dial where the operator cannot read it comfortably
• Ignoring bottom entry versus back entry
• Using a utility gauge for dirty or crystallising media without checking suitability
• Ordering before confirming BSP, NPT or other connection requirements
• Assuming a glycerine filled gauge has the same temperature limits as the dry version
• Replacing an old gauge by model number without checking the actual application

Do This, Not That

Quick Selection Checklist

Before requesting a quotation, confirm these points:

1. Normal operating pressure
2. Maximum expected pressure
3. Pressure, vacuum or compound requirement
4. Process media
5. Required dial size
6. Copper alloy or stainless steel wetted parts
7. Dry, fillable or glycerine filled version
8. Bottom entry or back entry
9. BSP, NPT, BSPT or other process connection
10. Process and ambient temperature
11. Vibration or pulsation at the installation point
12. Calibration certificate or special dial requirement

With these details available, pressure gauge selection becomes much faster and the chance of ordering the wrong configuration drops significantly.

Why Buy Baumer Utility Pressure Gauges Through Radical TechMart?

A pressure gauge may look like a simple product, but the number of combinations in range, dial size, mounting, connection, wetted material and filling means there is still plenty of room for selection mistakes.

At Radical TechMart, the focus should not be only on supplying a Baumer pressure gauge. The more useful approach is to understand where the gauge will be installed and then help narrow the configuration based on the actual application.

Whether the requirement is for an FRL unit, HVAC system, pump, compressor, hydraulic system, water line or OEM machine, sharing the application details before purchase can save considerable time during installation.

Final Thoughts

The right utility pressure gauge is not necessarily the most advanced gauge in the catalogue.

For a small pneumatic assembly, a compact economical AA gauge may be exactly what is needed. For machinery exposed to vibration, an AT configuration with filling capability can make more sense. HVAC installations may benefit from the purpose focused AV construction, while the BV family offers an economical stainless steel measuring system for clean utility applications.

The best selection comes from matching range, media, construction, dial size, mounting and operating conditions to the actual installation rather than selecting only by price or model number.

Baumer's current utility portfolio contains 18 listed variants, with nominal sizes from 40 mm to 250 mm and model specific measuring ranges extending up to 400 bar.

FAQs

1. What is a Baumer utility pressure gauge used for?

Baumer utility pressure gauges are used for local mechanical pressure indication in applications such as HVAC, pumps, compressors, water systems, hydraulics, pneumatics, FRL units and general industrial machinery.

2. What is the difference between AA and AT pressure gauges?

The AA is positioned as an economical general purpose gauge with a painted or powder coated steel case and copper alloy measuring system. The AT uses a stainless steel case and is available in dry, fillable and glycerine filled configurations, making it better suited to more rugged equipment installations.

3. Which Baumer utility pressure gauge is suitable for HVAC?

The AV family is specifically identified as an HVAC stainless steel pressure gauge. The AVF variant has a 100 mm dial and Class 1.6 accuracy.

4. When should I use a glycerine filled pressure gauge?

A filled gauge is worth considering where vibration or pressure pulsation makes a dry pointer unstable. AT and AV provide filling options, but the temperature limits of the filled configuration should be checked before selection.

5. Are Baumer utility pressure gauges available with different process connections?

Yes. Depending on family and configuration, the datasheets list BSP, NPT, BSPT and other connection possibilities. Always confirm the exact connection before ordering.

6. What dial size should I choose?

Choose based on available space and viewing distance. Compact 40 mm and 50 mm gauges suit smaller machinery, while 100 mm and 150 mm gauges provide easier local reading in larger installations. Baumer's utility range currently extends from 40 mm to 250 mm.

7. Can utility pressure gauges measure vacuum?

Selected models offer vacuum and compound scales. The exact range depends on gauge family, nominal size and configuration, so the range table should be checked before purchase.

A pressure gauge requirement often starts with three details: pressure range, dial size and process connection.

For a normal utility point, that may get you close. For high pressure gas, hazardous process service or an application where failure consequences matter, it is not enough.

This is where a solid front pressure gauge becomes relevant.

Baumer's current Solid Front Pressure Gauges category contains five models: AIF, AIH, AHG, BTF and BTH. AIF and AIH are stainless steel solid front gauges, AHG uses a fibre glass reinforced polypropylene case with stainless steel wetted parts, while BTF and BTH combine a mechanical pressure indication with a 4 to 20 mA transmitter output.

The important question, therefore, is not simply, “Which Baumer solid front gauge is available?” It is, “Which construction actually fits my process?”

What Makes a Solid Front Pressure Gauge Different?

The safety construction is the main reason to consider this category.

The uploaded Baumer AI datasheet describes a baffle wall positioned between the sensing system and the window, together with a pressure relieving back. The intention is increased safety if the pressure element fails.

Baumer's current AIF technical data identifies this as an S3 safety pattern gauge with solid front and pressure relief back according to EN 837 1. The AHG page also identifies an S3 solid front construction.

In practical terms, this is why a solid front gauge should not be treated as just another dial gauge with a stronger case. Its construction is specifically relevant when the application demands a safety pattern design.

Which Baumer Solid Front Gauge Fits Your Application?

AIF and AIH: All Stainless Steel Solid Front Gauges

AIF and AIH are the logical starting point when you need a conventional mechanical pressure gauge with stainless steel wetted parts and solid front safety construction.

The main difference is dial size. AIF is 100 mm and AIH is 150 mm. Both are currently listed with Class 1 accuracy and measuring ranges from 0 to 0.6 bar through 0 to 1600 bar. AIF carries CE and ATEX approvals on the current selector, while AIH is listed with IBR, CE and ATEX.

The uploaded AI datasheet gives more practical detail. It specifies AISI 316L stainless steel for the Bourdon tube and socket, AISI 304 stainless steel for the standard case, movement and blow off disc, IP65 protection, shatterproof safety glass, and dry, fillable or glycerine filled configurations. It also lists an optional accuracy of ±0.5% of full scale for applicable dry versions.

Best for: Process plants where a stainless steel mechanical gauge, wide pressure range and solid front construction are required.

Why these models make sense: AIF gives you the more compact 100 mm format. AIH gives you a larger 150 mm dial when visibility from a greater distance matters.

The current AIF data also lists maximum media temperature up to 300°C for the unfilled version, with lower limits for filled configurations. This is one specification worth checking carefully when the gauge is installed near hot process lines.

AHG: Polypropylene Case with Stainless Steel Measuring System

AHG is different from the AIF and AIH family.

It uses a 4½ inch fibre glass reinforced polypropylene case, while the process connection and Bourdon tube are stainless steel AISI 316L. Baumer currently specifies ±0.5% accuracy according to ASME B40.100, IP65 protection and gauge, compound and vacuum pressure measurement.

The uploaded AH datasheet also describes the solid front construction with a baffle wall and pressure relieving back, AISI 316L wetted parts and dry fillable or glycerine filled configurations.

Best for: Applications where a polypropylene case is preferred while retaining stainless steel wetted components.

Why this model makes sense: AHG is not simply another size of AI. Its case construction and standard ±0.5% accuracy make it a separate selection option.

It is particularly worth comparing with AIF when you need approximately the same dial size but have different requirements for case material or accuracy.

BTF and BTH: Mechanical Gauge Plus 4 to 20 mA Output

This family solves a different problem.

Sometimes the operator needs a pressure reading at the pipe, but the same value also needs to go back to a PLC, PID controller or data logger. Installing a separate gauge and transmitter is not always the preferred arrangement.

BTF and BTH combine local mechanical indication with a pressure transmitter. BTF uses a 100 mm dial, while BTH uses a 150 mm dial. Both are currently listed for gauge, compound and vacuum measurement, with a 2 wire system, 24 VDC supply, DIN electrical connection and 4 to 20 mA output.

The BT datasheet goes further. It specifies a ceramic transmitter diaphragm, AISI 316L stainless steel process connection, 4 to 20 mA output and transmitter accuracy of ≤ ±0.5% FS using BFSL, while the mechanical pressure gauge section is specified at ±1.0% of full scale. It also identifies pharmaceutical, oil, refrigeration, HVAC and compressor industries as applications.

Best for: Applications requiring both local pressure indication and an analog signal for remote monitoring or control.

Why these models make sense: An operator can see pressure locally while the control system receives the 4 to 20 mA signal.

This is also where buyers need to read the specifications carefully. The mechanical gauge accuracy and transmitter accuracy are not the same specification.

Quick Model Selection

Baumer's current category selector confirms these five products and their basic size, range, material and accuracy differences.

How to Select a Solid Front Pressure Gauge Correctly

1. Start With the Actual Operating Pressure

Do not automatically select a gauge whose full scale value is almost equal to the normal process pressure.

The AI and AH datasheets specify normal operating pressure at 75% of scale value. Their overpressure limits then vary according to the selected range.

That makes pressure headroom an important part of selection.

For example, if your process normally operates close to the maximum indicated value, check whether a higher range would provide a more appropriate operating margin.

2. Check the Process Media Against the Wetted Parts

For AIF and AIH, the standard Bourdon tube and process connection use AISI 316L stainless steel. AHG also uses AISI 316L wetted parts.

BTF uses AISI 316L for the process connection and Bourdon tube, while its transmitter section uses a ceramic diaphragm and NBR sealing.

This distinction matters because choosing by case material alone tells you very little about actual process compatibility.

3. Check Process Temperature Before Choosing Dry or Filled

A filled gauge may be attractive when damping is required, but do not assume the process temperature limit remains identical to the dry version.

For example, Baumer's current AIF page specifies media temperatures up to 300°C when unfilled, 100°C when glycerine filled and 200°C with silicone oil.

The AH product page gives a lower maximum process temperature for its unfilled construction, while the BTF and BTH transmitter gauges are listed for media temperatures from minus 25°C to 80°C.

This is one area where copying the pressure range from an existing gauge without reviewing temperature can create the wrong replacement.

4. Decide Whether Local Indication Is Enough

If the reading is only required at the equipment, an AIF, AIH or AHG may be sufficient.

If the same pressure value must also reach a control panel, PLC, PID controller or logger, BTF or BTH deserves closer attention because the BT design provides a 4 to 20 mA transmitter alongside the dial indication.

Do not purchase BTF or BTH without confirming the 24 VDC supply, 2 wire loop and DIN connector arrangement with your panel design.

5. Choose the Dial Size for the Installation, Not the Catalogue

A 150 mm gauge is easier to read from a distance, but it also occupies more space.

AIF and BTF provide 100 mm options. AIH and BTH provide 150 mm options. AHG sits in between as a 4½ inch design.

Check clearance around piping, valves, manifolds and nearby instruments before finalizing the size.

6. Confirm Mounting and Process Connection

The AI datasheet provides several mounting arrangements, including direct bottom entry and additional mounting options. Standard connection options include ½ inch BSP male and ½ inch NPT male, with M20 × 1.5 and other connections also listed.

The AH datasheet includes wall or surface mounting, direct lower back entry and lower back entry with front flange. One particularly important detail is that the direct lower back entry configuration is identified as never fillable.

That is the type of small ordering detail that can become a large site problem if it is missed.

Common Selection Mistakes

One Source Detail Worth Confirming Before Ordering

There are a few differences between the uploaded April 2025 datasheets and Baumer's current web data.

For example, the AI datasheet lists a standard ambient temperature of minus 20°C to +65°C, while the current AIF web page lists minus 25°C to +65°C.

The AH PDF shows pressure ranges beginning at 0/0.6 bar, while the current AHG web page displays its minimum range as 0 to 0.6 mbar.

Because these sources do not fully agree, confirm the latest model datasheet and ordering code before final purchase, especially for the lowest pressure range and temperature limits.

Quick Selection Checklist

Before sending an inquiry for a Baumer solid front pressure gauge, confirm:

1. Gauge, vacuum or compound pressure requirement
2. Normal operating pressure
3. Maximum expected pressure
4. Process media
5. Process temperature
6. Required accuracy
7. 100 mm, 150 mm or 4½ inch dial
8. Dry, fillable or liquid filled construction
9. Bottom, back or other mounting requirement
10. BSP, NPT, M20 or other process connection
11. Required material of wetted parts
12. IP and approval requirements
13. Whether only local indication is needed
14. Whether 4 to 20 mA output is required
15. Calibration or material certificates required

Why Buy Baumer Solid Front Pressure Gauges from Radical TechMart?

A pressure gauge inquiry should not stop at “0 to 100 bar, ½ inch connection.”

The correct selection also depends on media, operating pressure, temperature, mounting, dial size, material, accuracy, fill requirement and whether the pressure value must stay local or be transmitted to a control system.

At Radical TechMart, the focus is to help industrial buyers compare these application details before finalizing the instrument.

Whether the requirement is an AIF or AIH mechanical solid front gauge, an AHG polypropylene case gauge, or a BTF or BTH gauge with 4 to 20 mA transmission, the selection should start with the process conditions.

Final Thoughts

The biggest advantage of the Baumer solid front pressure gauge range is not that it gives you five model numbers to choose from. It gives you different constructions for different types of pressure measurement jobs.

Choose AIF or AIH when you need an all stainless steel mechanical safety pattern gauge. Consider AHG when its polypropylene case construction and ±0.5% accuracy fit the application. Look at BTF or BTH when the requirement includes both a local dial and a 4 to 20 mA signal.

In industrial pressure measurement, the correct gauge is selected by understanding what happens at the process connection, not simply by matching the dial range printed on the old instrument.

FAQs

1. What is a Baumer solid front pressure gauge?

It is a safety pattern pressure gauge with a solid barrier between the sensing system and viewing side, together with pressure relief construction. Baumer identifies AIF and AHG as S3 safety pattern gauges.

2. What is the difference between AIF and AIH?

The main model distinction is nominal size. AIF is 100 mm and AIH is 150 mm. Both are listed as stainless steel solid front gauges with Class 1 accuracy and measuring ranges up to 1600 bar.

3. What is the difference between AIF and AHG?

AIF uses a stainless steel case and has Class 1 accuracy. AHG uses a fibre glass reinforced polypropylene case and is listed at ±0.5% accuracy according to ASME B40.100. Both use stainless steel wetted parts.

4. Which Baumer pressure gauge provides 4 to 20 mA output?

BTF and BTH provide local pressure indication together with a 2 wire 4 to 20 mA transmitter operating from 24 VDC. BTF is 100 mm and BTH is 150 mm.

5. Can Baumer solid front gauges measure vacuum and compound pressure?

Yes. The AI, AH and BT families include gauge, compound and vacuum pressure options, subject to the selected model and range.

6. Can I use a glycerine filled solid front gauge?

Selected AI and AH configurations are available as fillable or glycerine filled versions. Temperature limits and mounting restrictions should be checked before ordering.

7. Which model should I select for PLC pressure monitoring?

If both local indication and a standard analog pressure signal are required, BTF or BTH are the relevant models in this category because they provide 4 to 20 mA output.

A pressure gauge is one of the simplest instruments in a plant, but it is also one of the easiest to select incorrectly.

A maintenance team may ask for a 0 to 10 bar gauge with a bottom connection. That sounds complete, but it still leaves several important questions unanswered. What is the process media? Is the line vibrating? What process temperature will the gauge see? Is the pressure only a few hundred millibar? How far away will the operator read the dial?

These details decide whether you need a compact stainless steel Bourdon gauge, a larger industrial gauge for easier reading, or a capsule gauge specifically meant for low-pressure measurement.

Baumer offers different pressure gauge constructions for these requirements. The ADC and ADD models use an all stainless steel Bourdon measuring system, while the AXD, AXF and AXH models use a capsule measuring element with copper alloy wetted parts for low-pressure applications.

The right way to select between them is not by model number alone. Start with the application.

What Are Industrial Pressure Gauges?

Industrial pressure gauges provide a direct local indication of pressure at a machine, pipeline or process point.

You will commonly find them on:

• Pumps
• Compressors
• Hydraulic systems
• Refrigeration equipment
• Process lines
• Chemical equipment
• Utility skids
• Diesel engines
• Food processing equipment
• Pharmaceutical equipment

Unlike a pressure transmitter, a mechanical pressure gauge does not normally send an electrical signal to a PLC or SCADA system. Its main job is to give operators and maintenance teams an immediate pressure reading directly at the equipment.

This makes the gauge useful for startup checks, troubleshooting, preventive maintenance and routine operator rounds.

Bourdon Pressure Gauge or Capsule Pressure Gauge?

This is the first major selection decision.

Choose a Bourdon gauge when:

You are measuring normal industrial pressure on pumps, compressors, hydraulic systems, process lines or machinery.

Baumer ADC and ADD use a Bourdon measuring system with AISI 316L stainless steel for the socket and Bourdon element. Their standard construction is designed for demanding industrial pressure measurement.

Choose a capsule gauge when:

The pressure is very low and a conventional industrial pressure gauge is not the best fit.

The Baumer AX series is designed for low-pressure measurement. Available pressure ranges start from 25 mbar and extend to 600 mbar. Typical applications include clean air, gases, draft measurement and low-viscosity, non-corrosive media.

That means a pump discharge pressure point and a low-pressure air duct may both need a gauge, but they should not automatically use the same type.

Baumer Industrial Pressure Gauge Models

Baumer ADC All Stainless Steel Pressure Gauge

The Baumer ADC is a practical option when you need a compact pressure gauge for industrial machinery, pumps or equipment where installation space is limited.

Its 50 mm dial keeps the overall size small, while the stainless steel measuring system makes it suitable for industrial pressure applications where material compatibility matters.

The standard 50 mm version has an accuracy of ±2.5% of full scale. If the application requires easier reading or better accuracy, moving to the 63 mm ADD version may make more sense.

Technical points to note:

• Nominal size: 50 mm
• Measuring principle: Bourdon
• Accuracy: ±2.5% of full scale
• Case and bezel: AISI 304 stainless steel
• Socket: AISI 316L stainless steel
• Bourdon element: AISI 316L stainless steel
• Movement: AISI 304 stainless steel
• Standard protection: IP65
• Ambient temperature: -25°C to +65°C
• Standard process temperature: maximum 200°C
• Operating pressure: 75% of scale value

Where it is commonly used:

• Pumps
• Engine compressors
• Diesel engines
• Hydraulic systems
• Refrigeration equipment
• OEM machinery

Baumer ADD All Stainless Steel Pressure Gauge

The Baumer ADD is a better fit when you still want a compact industrial gauge but need a larger 63 mm dial and improved reading accuracy.

In practical maintenance work, the difference between a 50 mm and 63 mm dial can matter. Gauges are often installed below eye level, inside machinery or next to pumps and piping. Better dial visibility makes routine inspection easier.

The model can also be configured as a dry, fillable or glycerine-filled gauge depending on the installation condition.

For machinery with vibration or pressure pulsation, a liquid-filled configuration may improve pointer stability and reduce mechanical wear.

Technical points to note:

• Nominal size: 63 mm
• Measuring principle: Bourdon
• Accuracy: ±1.6% of full scale
• Case and bezel: AISI 304 stainless steel
• Socket and Bourdon: AISI 316L stainless steel
• Standard protection: IP65
• Optional IP66 and IP67 protection listed
• Standard process temperature: maximum 200°C
• Dry, fillable and glycerine-filled configurations available
• Multiple bottom-entry and back-entry mounting arrangements available

Where it is commonly used:

• Process pumps
• Compressor systems
• Hydraulic equipment
• Petrochemical plants
• Pharmaceutical equipment
• Food and beverage processes

Baumer AXD Capsule Pressure Gauge

The Baumer AXD is intended for applications where pressure is too low for the normal selection logic used with a Bourdon gauge.

With a 63 mm nominal size and capsule measuring element, it is well suited to compact low-pressure indication points.

Technical points to note:

• Nominal size: 63 mm
• Measuring principle: Capsule
• Accuracy: ±1.6% of full scale
• Case and bezel: AISI 304 stainless steel
• Capsule: Copper alloy
• Socket: Copper alloy
• Movement: Copper alloy
• Standard protection: IP55
• Ambient temperature: -25°C to +65°C
• Process temperature: maximum 100°C
• Operating pressure: 75% of scale value
• Zero adjustment provision

Where it is commonly used:

• Clean air pressure measurement
• Gas pressure indication
• Draft measurement
• Food processing equipment
• Pharmaceutical utilities
• Low-pressure process systems

Baumer AXF Capsule Pressure Gauge

AXF uses the same basic capsule pressure measuring concept as the AXD but increases the dial size to 100 mm.

That larger dial becomes useful when the pressure point is mounted farther away from the operator or when small pressure changes need to be read more comfortably.

The AX series supports multiple pressure, vacuum and compound scales, including units such as mbar, kPa, inWC, MWC, inHg and mmHg depending on the requirement.

Technical points to note:

• Nominal size: 100 mm
• Capsule measuring element
• Accuracy: ±1.6% of full scale
• AISI 304 stainless steel case
• Copper alloy capsule and socket
• IP55 protection
• Zero adjustment provision
• Maximum process temperature: 100°C
• Multiple bottom-entry, back-entry and flange mounting arrangements available

Where it is commonly used:

• Low-pressure utility systems
• Clean air lines
• Gas pressure monitoring
• Draft indication
• Food and beverage plants
• Pharmaceutical utilities

Baumer AXH Capsule Pressure Gauge

The Baumer AXH takes the same low-pressure capsule concept into a 150 mm nominal-size gauge.

This is useful when local pressure needs to be visible from a greater distance or when operators need a large, easy-to-read dial.

AXH retains the low-pressure capsule design, copper alloy measuring system and ±1.6% full-scale accuracy of the AX family.

Technical points to note:

• Nominal size: 150 mm
• Measuring principle: Capsule
• Accuracy: ±1.6% of full scale
• Stainless steel case and ring
• Copper alloy capsule
• Copper alloy socket
• IP55 protection
• Maximum process temperature: 100°C
• Zero adjustment provision
• Multiple mounting configurations available

Where it is commonly used:

• Plant utility systems
• Large process equipment
• Clean gas lines
• Draft measurement
• Low-pressure monitoring stations
• Applications requiring easy long-distance reading

ADC vs ADD vs AXD vs AXF vs AXH

Key Selection Factors for Industrial Pressure Gauges

1. Start with the actual pressure range

Do not select a gauge whose maximum scale is almost equal to normal operating pressure.

For the AD series, the recommended continuous operating pressure is 75% of the scale value. The gauge also has defined overpressure limits depending on the selected pressure range.

Give the gauge enough headroom for normal process variation.

2. Check whether the pressure is genuinely low

If the requirement is measured in tens or hundreds of millibar, a capsule gauge may be more appropriate than a standard Bourdon gauge.

This is where AXD, AXF and AXH become relevant.

3. Match the wetted material to the media

ADC and ADD use AISI 316L stainless steel for the socket and Bourdon element.

AX models use copper alloy for the capsule and socket.

That difference should be treated as a selection parameter, not just a construction detail.

4. Decide the dial size from viewing distance

A 50 mm dial works well on compact machines.

A 63 mm dial provides a useful balance between size and readability.

For low-pressure applications, 100 mm and 150 mm AX variants become useful when the gauge must be read from farther away.

5. Consider vibration and pulsation

A pump or compressor can produce a pointer that continuously fluctuates.

Where required, consider a liquid-filled configuration or suitable accessories such as a snubber. This helps stabilize the pressure indication under pulsating conditions.

6. Confirm process temperature

Do not check only ambient temperature.

The fluid entering the pressure connection can expose the gauge to much higher temperatures. For high-temperature services, accessories such as siphons or cooling elements may also need to be considered.

7. Confirm mounting and connection before ordering

Bottom entry, lower back entry, center back entry, flange mounting and bracket mounting are not interchangeable once the installation is fabricated.

The connection size and thread standard also need to match the process connection.

Common Mistakes to Avoid

Quick Selection Checklist

Before ordering an industrial pressure gauge, confirm:

1. What is the normal operating pressure?
2. What is the maximum possible pressure?
3. Is it pressure, vacuum or compound measurement?
4. Is the application low pressure?
5. What process media touches the gauge?
6. Are stainless steel wetted parts required?
7. What is the process temperature?
8. Is there vibration or pulsation?
9. What dial size can the operator read comfortably?
10. Is bottom or back entry required?
11. What is the thread and connection size?
12. Is a calibration certificate required?
13. Are IP66, IP67 or other protection options needed?
14. Is an accessory such as a snubber, siphon or gauge cock required?

Why Buy Industrial Pressure Gauges from Radical TechMart?

Pressure gauge selection becomes much easier when the inquiry includes the actual process details rather than only a model number.

At Radical TechMart, the focus is to help customers select pressure instruments according to application, measuring range, media, material, mounting and installation condition.

Support is available for OEMs, maintenance teams, factories, EPC contractors, project engineers and purchase departments looking for Baumer pressure gauges and other industrial pressure instruments.

If you are replacing an existing gauge, sharing the old model number, pressure range, connection, dial size and application can help narrow down the suitable replacement much faster.

Final Thoughts

The difference between ADC, ADD, AXD, AXF and AXH is not simply dial size.

ADC and ADD are better suited to conventional industrial pressure measurement using an all stainless steel Bourdon measuring system. AXD, AXF and AXH move into low-pressure measurement using a capsule mechanism, with dial size increasing according to the visibility requirement.

The best pressure gauge is the one that matches the process pressure, media, operating temperature, mounting arrangement and the way the maintenance team will actually use it.

In industrial applications, correct pressure gauge selection saves much more than the cost of replacing a wrong instrument. It makes daily inspection easier, reduces premature failure and gives operators a pressure reading they can actually trust.

FAQs

1. What is the difference between Baumer ADC and ADD pressure gauges?

Both use an all stainless steel Bourdon measuring system. ADC is the 50 mm version with ±2.5% full-scale accuracy, while ADD is the 63 mm version with ±1.6% full-scale accuracy and better dial readability.

2. When should I use a capsule pressure gauge?

A capsule gauge is useful for low-pressure applications such as clean air, gas and draft measurement. The Baumer AX range is designed for low pressures from 25 mbar to 600 mbar.

3. What is the difference between AXD, AXF and AXH?

The main difference is nominal dial size. AXD is 63 mm, AXF is 100 mm and AXH is 150 mm. Larger dial sizes are useful when the gauge needs to be read from farther away.

4. Can Baumer industrial pressure gauges be glycerine filled?

The AD series includes dry, fillable and glycerine-filled configuration options. Liquid filling can be useful where vibration or pulsation affects pointer stability.

5. Can these pressure gauges connect directly to PLC or SCADA?

These are mechanical pressure gauges intended primarily for local pressure indication. For electrical signal transmission to a PLC, HMI or SCADA system, consider a pressure transmitter or an appropriate electronic pressure instrument.

6. How do I choose the correct pressure gauge range?

Select a range that keeps normal operating pressure comfortably below full scale. Also consider startup pressure, process fluctuations and possible pressure spikes before finalizing the range.

7. Is stainless steel construction always necessary?

Not always. It depends on process media, environment and application. However, wetted-part compatibility should always be checked. A stainless steel case alone does not mean the internal measuring parts are stainless steel.

8. What details should I provide when asking for a pressure gauge quotation?

Provide pressure range, media, dial size, process connection, mounting type, process temperature, required accuracy, dry or filled preference and any calibration requirement.