Cracks?
Take measures.

Crack monitors, mechanical or digital gauges and wireless sensors to measure crack opening, its variations and structural movement. Designed and manufactured in France.

Selection guide
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30 years of French manufacturing

20+ products in our range

4,000+ users of the app

20,000+ gauges monitored

dispatched within 48 h

What do you need to monitor?

Each structural defect calls for a specific instrument. Choose the phenomenon and we’ll show you the right gauges.

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Opening

Crack monitored on 1 axis, in a single plane

Opening and shear

Crack monitored on 2 axes, in a single plane

3-axis movement

Movement in all three dimensions

Misalignment

Vertical or horizontal misalignment between structures

Tilt

Tilting of a wall, pillar or balcony

Deflection

Deflection of a beam, ceiling or structure

Wall spacing

Two points several metres apart

Crack width

One-off measurement with the crack ruler

Humidity and temperature

Stand-alone monitoring of humidity and temperature

Our most widely installed instruments

The experts’ choice, from mechanical crack monitors to wireless sensors.

Full range

Read on site, or monitor remotely?

Both approaches can be combined on the same structure. The choice depends on how accessible the measuring point is and how often readings are needed.

Manual reading gauges

On-site reading, mechanical or digital

  • No power supply, no maintenance
  • Bonded or screwed in place in a few minutes
  • Automatic reading of G1 gauges by the app
  • From the G1 gauge to the E1 digital crackmeter
View manual reading gauges

Capteurs connectés

Automatic readings, threshold alerts

  • Measurements transmitted with no site visit required
  • Alert as soon as a displacement threshold is exceeded
  • Remote sensor configuration
  • First-year subscription included
View wireless sensors

All your measurements in a single app

Supplied with the gauges, the Saugnac app centralises readings, photos and comments, whatever the instrument installed.

Automatic G1 reading

In seconds, using your smartphone camera

Threshold alerts

Notification as soon as a displacement exceeds the set limit

Custom charts

Create clear, professional chart reports in a few clicks

Link sharing

Third parties can view the data without creating an account

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Latest products

Saugnac, the expert's brand

Because materials live and soils move, many structures need to be placed under observation. That is the primary purpose of Saugnac gauges: to monitor.

Each structural defect calls for a specific instrument, from the mechanical tell-tale, the industry reference for over thirty years, to the wireless sensor for remote monitoring.

By matching the gauge to the phenomenon observed — crack, displacement, sliding, tilt — monitoring makes it possible to measure worsening, stabilisation and even cycles of change over time.

Together with the Saugnac app, these instruments give building surveyors, structural engineers, architects and asset managers a simple, reliable way to collect data.

Everything you need to know about crack gauges

Key guidance on choosing, installing and monitoring with an instrument.

All resources

Compare Saugnac Gauges

All products side by side, by type of measurement.

Which gauge for which crack?

The selection guide based on the defect observed.

Fixing a G1-type gauge

Bonded or screwed installation, step by step.

The alternative to plaster crack monitors

Why plaster does not provide a usable measurement.

Made in France

Designed, manufactured and assembled in France

Delivery within 48 h

Products in stock, delivered worldwide

Secure payment

Credit card or bank transfer

Technical advice

Answers by phone or email

App included

On PC and smartphone, at no extra cost

Not sure which gauge to install?

Describe the defect and its context: we will recommend the right instrument and the appropriate installation method.

Ask a technical question