100mm Pressure Gauges

100mm pressure gauges provide a large, easy-to-read dial for local pressure indication on plant, pipework, skids and industrial equipment. They are often chosen where readings need to be checked clearly during operation, inspection and maintenance.

This range is suitable for replacement gauges, maintenance use, OEM equipment and industrial systems requiring straightforward pressure measurement. Check each product for pressure range, process connection, mounting style, materials and whether a dry or filled gauge is appropriate for the application.

8 products

100mm Back Entry Industrial Pressure Gauge - GNW Instrumentation

100mm Back Entry Glycerine Filled Pressure Gauge

From £89.25

100mm Bottom Entry General Purpose Pressure Gauge

From £33.08

100mm Bottom Entry Industrial Pressure Gauge

From £72.45

100mm Bottom Entry Glycerine Filled Pressure Gauge

From £78.75

100mm Back Entry Industrial Pressure Gauge

From £82.95

100mm Back Entry General Purpose Pressure Gauge

From £33.08

100mm bottom entry low pressure pressure gauge - GNW Instrumentation

100mm Bottom Entry Low Pressure Capsule Gauge

From £64.00

100mm Back Entry All Stainless Steel Pressure Gauge

From £79.00

Choosing a 100 mm Pressure Gauge

100 mm pressure gauges provide local indication for machinery, plant and process equipment. Its larger dial is easy to check from a normal working distance on plant, pipework and equipment panels.

Choose the range around the normal operating pressure, then confirm the scale units, connection size, thread form and bottom- or back-entry arrangement. Mechanical gauges in this size are specified at ±1.6% FS; check the individual product for its complete specification.

Compare general-purpose, glycerine-filled, industrial and all stainless steel gauges according to the operating conditions and required materials.

Browse pressure gauge accessories for adaptors, mounting components, valves and protection options, or return to all pressure gauges.

100 mm Gauge Selection

100 mm describes the nominal dial diameter, not the pressure range or connection. Its larger dial is easy to check from a normal working distance on plant, pipework and equipment panels.

When replacing an instrument, record the full scale, units, thread form, connection size and entry position. Matching the dial diameter alone is not enough.

Mechanical gauges in this size are specified at ±1.6% FS. Because this is based on full scale, consider the resulting allowance at the readings you need to monitor.

100 mm Dial

Its larger dial is easy to check from a normal working distance on plant, pipework and equipment panels.

±1.6% FS Accuracy

The accuracy allowance is based on the complete measuring span rather than the current reading.

Construction Choices

Compare dry, filled and material options available in this size, then check the complete product specification.

Learn more

Typical Applications

Suitable for local pressure indication, maintenance replacement and equipment builds where a 100 mm dial and the selected specification suit the duty.

Process pipework

Used for local pressure indication on process lines where operators or maintenance teams need to read gauge values during routine checks.

Pumps and compressors

Installed on pump sets, compressor systems and associated pipework to support pressure monitoring during operation and maintenance.

Industrial plant rooms

A larger dial can assist visibility in plant rooms, utility areas and service systems where gauges may be mounted among other equipment.

OEM equipment

Specified on packaged equipment, skids and machinery where the design calls for a 100mm pressure gauge for clear local indication.

How to Choose

Select the pressure range, choose the required construction, match the connection and confirm that the dial will fit and remain readable.

Pressure range

Choose a range suitable for the normal operating pressure and any expected fluctuations. Avoid selecting solely by dial size; the scale must match the application.

Connection and mounting

Check the thread type, connection position and mounting style against the existing installation or equipment drawing before ordering.

Media and materials

Confirm that the wetted parts and case construction are suitable for the process media and surrounding environment, especially on corrosive or outdoor installations.

Vibration and pulsation

Where vibration or pressure pulsation is present, consider whether a filled gauge, snubber, syphon or other pressure gauge accessory is required.

100mm Gauge FAQs

Common buyer questions about selecting, replacing and installing 100mm pressure gauges for industrial pressure measurement.

What is a 100mm pressure gauge used for?

It is used for local pressure indication where a larger dial is required for easier reading on industrial plant, pipework, machinery or process equipment.

Can I replace another gauge with a 100mm dial gauge?

Yes, if the pressure range, connection thread, mounting orientation, materials and installation space are compatible with the existing gauge and process conditions.

Is a 100mm gauge better than a smaller dial gauge?

Not always. A 100mm dial improves readability, but the correct choice depends on visibility requirements, available space, mounting arrangement and the pressure measurement duty.

Do I need a dry or glycerine filled pressure gauge?

Dry gauges suit many routine applications. Filled gauges are often considered where vibration or pulsation may affect readability or gauge life; check the product suitability.