40mm Pressure Gauges

40mm pressure gauges provide compact local pressure indication for industrial equipment, control panels, machinery and pipework where installation space is limited. Their small dial size makes them suitable for pressure measurement on OEM equipment, replacement gauges and maintenance applications requiring a direct mechanical reading.

Choose from available configurations such as bottom entry or back entry where listed, and check the pressure range, process connection, mounting position and media compatibility before ordering. For systems with vibration or pressure pulsation, review whether a filled gauge option is suitable where available.

7 products

40mm Back Entry Industrial Pressure Gauge

From £46.20

40mm Bottom Entry Industrial Pressure Gauge

From £42.00

40mm Back Entry Glycerine Filled Pressure Gauge

From £51.45

40mm Bottom Entry Glycerine Filled Pressure Gauge

From £39.95

40mm Bottom Entry All Stainless Steel Pressure Gauge

From £50.00

40mm Bottom Entry General Purpose Pressure Gauge

From £17.33

40mm Back Entry General Purpose Pressure Gauge

From £17.33

Compact Pressure Gauge Selection

40mm pressure gauges are used where a smaller dial is needed for local pressure indication on compact equipment, panels, pipework and machinery. Their reduced face size makes them suitable for installations where space is limited but a direct mechanical reading is still required.

This collection is relevant for industrial buyers, maintenance teams and OEM users looking for small dial pressure gauges for replacement, maintenance stock or new equipment builds. Options may include different mounting orientations such as bottom entry or back entry, depending on the product selected.

When replacing an existing gauge, check the dial size, pressure range, connection type, entry orientation and compatibility with the process media before ordering. For vibrating equipment or applications with pressure pulsation, consider whether a glycerine filled pressure gauge option is appropriate where available.

Compact 40mm Dial

A 40mm gauge face provides local pressure indication where panel space, enclosure size or equipment layout limits the use of larger industrial gauges.

Mounting Options

Bottom entry and back entry configurations help match the gauge to existing pipework, panels, machines and replacement installations.

Industrial Replacement Use

Suitable for maintenance teams and OEM buyers sourcing compact pressure indicators for equipment servicing, routine replacement and new builds.

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Typical Applications

These compact gauges are used across industrial and engineering environments where clear local pressure measurement is needed in a smaller format.

Machine Builds

Used on compact machinery and OEM equipment where a small pressure indicator is required for operator checks or commissioning.

Maintenance Replacement

Useful for replacing existing 40mm gauges on plant, skids, pumps, compressors or service equipment when the original format must be matched.

Control Panels

Back entry variants can suit panel-mounted or enclosure-based installations where pipework or ports are positioned behind the gauge face.

Local Pressure Checks

Provides direct visual pressure indication at the point of use for routine monitoring, inspection and process equipment checks.

Choosing a 40mm Gauge

Select a gauge by matching the mechanical fit, pressure measurement requirement and operating environment to the equipment or process.

Match the Pressure Range

Choose a pressure range suitable for the normal operating pressure and expected maximum pressure of the system. Always refer to the individual product details.

Check Entry Position

Select bottom entry or back entry to suit the installation layout, viewing angle and existing connection point on the equipment.

Confirm Compatibility

Check the connection type, process media and surrounding environment before ordering, especially when replacing an existing pressure gauge.

Consider Damping

Where vibration or pulsation is present, a glycerine filled pressure gauge option may help provide steadier local indication if available in the selected range.

40mm Gauge FAQs

Common questions from engineers, maintenance teams and buyers selecting compact pressure gauges for industrial use.

What is a 40mm pressure gauge used for?

A 40mm pressure gauge is used for compact local pressure indication on machinery, panels, service equipment and pipework where a larger dial is not practical.

Should I choose bottom entry or back entry?

Choose bottom entry when the gauge connects from below, or back entry when it mounts through a panel or connects from behind. Match the orientation to the existing installation.

Can I replace an existing gauge with a 40mm model?

Yes, if the dial size, pressure range, connection type, entry orientation and media compatibility match the original gauge and application requirements.

When should I consider a glycerine filled 40mm gauge?

Consider a glycerine filled option where equipment vibration or pressure pulsation may make the pointer difficult to read, provided the selected product suits the application.