40mm General Purpose Pressure Gauges

40mm general purpose pressure gauges provide compact local pressure indication for industrial equipment, pneumatic panels, hydraulic systems and OEM machinery where space is limited.

These small dial gauges are suitable for routine pressure measurement and pressure monitoring when the gauge range, connection position and materials are compatible with the application. Choose from available entry styles to suit replacement gauges, maintenance work and new equipment builds.

2 products

40mm Back Entry General Purpose Pressure Gauge

From £17.33

40mm Bottom Entry General Purpose Pressure Gauge

From £17.33

40mm General Purpose Pressure Gauges Overview

40mm General Purpose Pressure Gauges are compact instruments designed for reliable pressure indication in space constrained installations. Available in bottom entry and back entry configurations these gauges support a range of mounting options including panel mounting surface mounting and direct mounting. Their small dial size makes them ideal where space is limited while still providing clear and dependable readings.

Constructed with black metal cases and brass internals these gauges offer a cost effective solution for general industrial applications. They are widely used where moderate accuracy is sufficient and robust mechanical performance is required for long term operation.

Compact pressure indication

40mm general purpose pressure gauges are used where a small dial pressure indicator is required for local pressure indication on compact equipment, panels and machinery. Their 40mm dial size makes them suitable for space-limited installations where a larger industrial pressure gauge would be difficult to fit.

This collection is intended for general monitoring duties across pneumatic, hydraulic and process equipment where the gauge materials and pressure range are compatible with the application. Supplied options may include bottom entry and back entry formats, supporting direct mounting, panel layouts and equipment builds.

When replacing an existing gauge, match the dial size, pressure range, connection position and mounting arrangement before ordering. For maintenance teams and OEM buyers, keeping these details consistent helps avoid installation issues and supports reliable routine pressure measurement.

Compact 40mm dial

A small dial format for local pressure indication on machinery, panels and installations where space is limited.

Mounting options

Bottom entry and back entry styles support common installation layouts, including direct equipment mounting and panel-based arrangements.

General monitoring

Suitable for routine industrial pressure indication when the selected range, materials and connection style match the application.

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Typical applications

These compact gauges are used across general industrial equipment where a clear local pressure reading is needed without a larger dial footprint.

Pneumatic control panels

Used for local pressure indication on air preparation units, control panels and compact pneumatic systems.

Hydraulic equipment

Suitable for routine monitoring on compact hydraulic equipment where pressure conditions are within the selected gauge range.

OEM machinery

A practical choice for machine builders requiring a compact mechanical pressure indicator for equipment builds.

Maintenance replacement

Useful for replacing small dial gauges on existing plant when the pressure range, entry position and connection arrangement are matched.

Choosing the right gauge

Select a 40mm pressure gauge by checking the application conditions and matching the gauge to the existing equipment or new installation requirements.

Pressure range

Choose a range that covers the normal working pressure while allowing suitable headroom for expected operating variation.

Entry position

Match bottom entry or back entry to the mounting layout, especially when replacing an existing gauge in a panel or on equipment.

Media compatibility

Check that the wetted materials, including brass internals where specified, are suitable for the process media and operating conditions.

Installation environment

Consider space, visibility, vibration, pulsation and the surrounding environment. For severe pulsation or vibration, a damped or filled gauge may be more appropriate.

40mm gauge FAQs

Common selection questions for compact general purpose pressure gauges used in industrial and maintenance applications.

What is a 40mm pressure gauge used for?

A 40mm pressure gauge is used for local pressure indication where space is limited, such as pneumatic panels, compact hydraulic equipment and OEM machinery.

Should I choose bottom entry or back entry?

Choose bottom entry when the gauge connects from below and back entry when it mounts through or onto a panel from the rear. Match the existing layout for replacements.

Are these gauges suitable for all fluids and gases?

Suitability depends on the pressure range, materials and process media. Check media compatibility with the gauge internals before installation.

Can I replace a larger gauge with a 40mm gauge?

Only if the pressure range, connection, mounting arrangement and readability are suitable. A 40mm dial is compact but may be harder to read at distance.