R130 Gauge – Wireless deflection monitor

Technical specifications

Overview of the R130 gauge — monitoring deflection, tilting and deformation

The R130 builds on the robustness and operating principles of the G130 gauge, adding full connectivity for real-time remote monitoring. It measures the evolution of a deflection, with automatic data transmission through the saugnac.app application.

Unlike a standard wireless crackmeter, which measures the opening of a crack between two closely spaced points, the R130 measures a deflection or a deformation over a span of 3 to 15 m using a metrological Invar cable, which makes it suitable for monitoring long spans: floors, beams, roof structures and civil engineering structures.

The R130 gauge is built around:

• An R1 wireless gauge with a specific fitting to attach it to the Invar cable: the integrated sensors transmit the data automatically to the digital platform, removing the need for any manual reading and allowing continuous monitoring.
• A metrological Invar cable (Ø 1.65 mm, thermal expansion coefficient 4.4 × 10⁻⁷/°C between 20°C and 100°C) tensioned between two fixed points.
• A mechanical tensioning device matched to the length of the cable.
• A calibrated spring maintaining constant tension.

Installation examples:

Applications and use cases

The R130 gauge is designed for remote structural monitoring in a wide range of contexts:

• Floor or slab deflection monitoring: tracking the progressive sagging of a floor under load.
• Beam and roof structure monitoring (timber, concrete, steel): detecting slow deformation over long spans.
• Monitoring of civil engineering structures and historic monuments: continuous monitoring without repeated technician visits.
• Monitoring during adjacent or demolition works: following the behaviour of a structure exposed to vibration and movement.
• Tilting and settlement monitoring: tracking the long-term evolution of a structural movement.

To monitor the opening of a crack rather than a deflection, the R1 wireless crackmeter remains the appropriate solution.

Measurement monitoring with the Saugnac app

All the data collected by the 3 sensors is accessible in the Saugnac app https://saugnac.app from a PC or smartphone. The app is supplied with the R130 gauge and remains accessible even after the subscription for transmitting the gauge’s data has expired.

This very simple app allows you in particular:

• to generate and download graphs
• to download the data in Excel or CSV format
• to set alert thresholds with email notifications
• to change the settings remotely
• to share the data in a single click

For a study and a tailored quotation: contact us.

Frequently asked questions

How can the deflection of a beam or a floor be measured remotely?

The R130 gauge measures deflection continuously, using an Invar cable tensioned between two anchor points and a wireless linear sensor. The data is transmitted automatically over the LTE-M / NB-IoT network and can be consulted in the Saugnac app, with no site visit required to take the reading.

What is the difference between the R130 and a wireless crackmeter?

A wireless crackmeter such as the R1 gauge measures the opening of a crack between two closely spaced points. The R130 measures a deflection or a deformation over a span of 3 to 15 m, which makes it suitable for monitoring large structures: floors, beams, roof structures and civil engineering works.

Does the R130 work in a basement or a cellar?

The LTE-M / NB-IoT module offers better signal penetration than a conventional mobile network, which makes reception possible in a cellar, basement or car park depending on the site. A coverage check at the installation location is recommended beforehand.

Over what distance can a deflection be monitored with the R130?

The R130 covers a distance of 3 to 15 m between the two anchor points as standard. Beyond that, a preliminary analysis makes it possible to check the conditions and define a suitable solution.

What is the battery life of the R130 gauge?

Battery life is between 2 and 7 years, depending on the measurement and transmission frequency settings.