40mm Pressure Gauges

These 40 mm pressure gauges cover different mechanical constructions for small machinery and crowded mounting points. Compare the styles by the process conditions rather than assuming all gauges of the same size are interchangeable.

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40mm Back Entry All Stainless Steel Pressure Gauge
40mm Back Entry All Stainless Steel Pressure Gauge Sale priceFrom £63.27
40mm Back Entry Industrial Pressure Gauge
40mm Back Entry Industrial Pressure Gauge Sale priceFrom £51.28
40mm Back Entry Industrial Pressure Gauge
40mm Back Entry Glycerine Filled Pressure Gauge Sale priceFrom £57.11
40mm Bottom Entry Industrial Pressure Gauge
40mm Bottom Entry Industrial Pressure Gauge Sale priceFrom £46.62
40mm Bottom Entry Industrial Pressure Gauge
40mm Bottom Entry Glycerine Filled Pressure Gauge Sale priceFrom £44.34
40mm Bottom Entry All Stainless Steel Pressure Gauge
40mm Bottom Entry All Stainless Steel Pressure Gauge Sale priceFrom £55.50
40mm Bottom Entry General Purpose Pressure Gauge
40mm Bottom Entry General Purpose Pressure Gauge Sale priceFrom £19.24
40mm Back Entry General Purpose Pressure Gauge - GNW Instrumentation
40mm Back Entry General Purpose Pressure Gauge Sale priceFrom £19.24

Further Reading

40 mm Gauge Selection

The dial is intended for close inspection; confirm there is clearance around both case and connection. A liquid-filled gauge can steady the pointer under vibration; a stainless-steel version may be necessary for particular process media.

Choose the Correct Gauge

Match the range, entry position and materials to the existing installation.

2.5% Accuracy

The stated accuracy is 2.5%. Compare the allowable error at the selected full scale with your measurement requirement.

Installation Check

Confirm the process connection, mounting position and expected pressure conditions.

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Typical Applications

Suitable for local pressure indication, maintenance replacement and equipment builds where a 40 mm dial and the selected specification suit the duty.

Pneumatic Equipment

Used on air lines, regulators, control panels and pneumatic machinery for quick visual confirmation of operating pressure.

Hydraulic Units

Suitable for compact hydraulic power packs and maintenance points where a small gauge is needed for local pressure indication.

Compressors and Air Systems

Applied on compressor packages, receiver connections and compressed air equipment where space-saving pressure monitoring is required.

OEM Machinery

Commonly specified on machine builds, test equipment and process skids where compact instrumentation supports operator checks and commissioning.

How to Choose

Options can differ in filling, entry position and wetted materials. All currently listed models have 2.5% stated accuracy.

Pressure Range

Choose a range that suits the normal working pressure of the system and allows clear reading during routine operation.

Connection and Mounting

Check the thread type, connection position and mounting arrangement against the existing gauge or equipment design before replacing.

Dry or Glycerine Filled

Use dry gauges for steady conditions and consider glycerine filled gauges where vibration, pulsation or pointer movement may affect readability.

Media and Environment

Confirm the gauge materials are compatible with the process media and surrounding environment, especially in damp, dirty or corrosive areas.

40mm Gauge FAQs

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