LS-G6-VW-RCR

Vibrating Wire RCR

  • Ultra-robust 5-channel data logger designed to be embedded in precast concrete to measure real-time stress and strain in concrete segments.
  • Suitable for construction projects underground . Up to 3 km radio range.
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The vibrating Wire RCR is the best option to securely monitor structural health of tunnel linings and other concrete-based infrastructure from as early as the concrete segment manufacturing stage.

Made to resist concrete 

A resistant polymer casing and re-enterable insulating resin protect electronic components from unexpected concrete filtration.

Long range communications

Fitted with an internal antenna, it can transmit data up to 400 m and up to 3 km with good visibility in tunnels with interfering machinery (such as TMB).

Mobile app configuration

Advanced setup features to detect sensor connectivity and reduce noise interference.

Advanced device management features

To detect sensor connectivity and reduce noise interference

Features

Main technical specifications

Input Types
Vibrating wire and thermistor per channel
Memory
73 500 readings

Vibrating Wire

Measurement Method
Embedded algorithms increasing immunity to noise
Excitation Wave
±5 V
Measurement Range
300 to 7000 Hz
Accuracy
From 0.008% to 0.013% (depending on frequency sweep range)
Resolution
<0.01 Hz (depending on frequency sweep range)

Thermistor

Measurement Range
0 Ω to 4 MΩ
Resolution
1 Ω
Accuracy (20º Cº)
0.05º c (0.04% FS)

Battery Life Estimations

Reporting Period
Lifespan
5 min
4.6 years
1 h
22.7 years
6 h
> 25 years
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Check the most updated and complete technical specifications downloading the Vibrating Wire RCR product datasheet 

Applications

Explore the range of monitoring solutions the Vibrating Wire RCR enables in structural monitoring.

Strain and stress of concrete segments

Strain gauges Pressure cells

Assess the strain and stress of tunnel lining segments, bridge pillars, concrete slabs, segmental bridges, diaphragm walls, precast foundations, shafts, columns and beams by embedding a Vibrating Wire RCR along with pressure cells or strain gauges during the fabrication phase of pre-cast concrete segments.

Vibrating Wire RCR
LS-G6-VW-RCR

Tunnel Lining Solution

Learn how to perform tunnel lining monitoring using IoT LoRa technology and how to get real-time data as early as the lining construction phase.

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Mounting Options

Embedded in pre-cast concrete

The Vibrating wire comes readily prepared to be embedded in wet concrete along with vibrating wire sensors.

For a full list of available accesotries, check out the

Vibrating Wire Product Datasheet 

Downloads

Explore our comprehensive collection of datasheets and downloadable resources. Find detailed product information, specifications, and tools to help you make informed decisions and maximize the use of our advanced technologies.

Datasheet EN

Check all the technical specifications of our Vibrating Wire data acquisition devices

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Frequently asked questions

What is the main use of the VW-RCR?

The VW-RCR is very well suited for tunnel construction when using tunnel boring machines (TBM) and concrete tunnel linings. Using data loggers that are embedded in tunnel linings during the manufacturing process significantly reduce the tasks and time needed to deploy standard monitoring solutions after the TBM has passed. Additionally, the VW-RCR provides critical information about the manufacturing process and the loads withstood by the concrete segments during construction and the structure’s lifetime.

Why do you say it is designed to withstand concrete?

There are two major components: first, the plastic case that is designed to withstand wet concrete, and second, the insulating resin that seals off the VW-RCR components. These two components are vital to the necessary robustness of the VW-RCR when it is being embedded in wet cement during concrete segment manufacturing.

How is this device different from the existing Vibrating Wire Data Logger?

The VW-RCR differs from Vibrating Wire 5-channel data logger in that the insulation provided in the VW-RCR makes it an IP68 rated device, which means it features a higher resistance to water and can be embedded in concrete. In addition, the communication ranges are achieved by an internal whip antenna, instead of a standard external antenna. Finally, the barometer is not functional, which the standar VW-5ch does.

How are the long-range communication capabilities affected by being embedded in concrete?

During tunnel construction, the radio range is mainly affected by the interferences of the TBM itself. Once the TBM is removed and the tunnel is in completed, the radio range from a device to the nearest gateway can be up to 3 km in a straight line and 800 m in curved tunnels.

How does the device configuration work?

Once securely placed in the precast frame and before the cement is poured into the mold, the VW-RCR can be configured through the Worldsensing App via USB cable.

What does “re-enterable insulating resin” mean?

The resin used to insulate the VW-RCR has a gel-like consistency that can be cut and removed once it sets. The circuit board, connectors and batteries are this way accessible, even after the case is sealed with the resin.

How can I access the device once it is embedded?

For configuration purposes, the USB port can be accessed by opening the lid of the VW-RCR. If the device is already embedded, the concrete layer covering the device lid must be chiseled out in order to access the device lid.

Need more info or support? Talk to an expert

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Loadsensing is a family of long-range, low-power devices that allow you to wirelessly transmit sensor data to your information systems.

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What they say about us

Discover how Worldsensing has made a positive impact, providing reliable solutions and exceptional support.

Embedded devices within the lining represents a major step forward in tunnel boring safety and efficiency. We can now drastically reduce the delays involved in installing and configuring tunnel monitoring systems, saving time and costs. Read success story

Guillaume Gehu
Contract Manager, Sixense France

The Worldsensing solution is robust and reliable in a challenging construction environment. Thanks to its simple installation and low maintenance, it reduces the time the team has to spend to re-enter the site to obtain key data for environmental risk control. Read success story

Zhangwei Ning, PhD
Technical Manager, Sixense Inc.

The set-up and installation was extremely simple. The data could be immediately transferred to the evaluation and visualization system. Its main advantage is its ability to send radio signals from under manholes and over a long distance. Read success story

Dr.-Ing. Andreas Wagner
Project Manager, Angermeier Ingenieure

Everything with the solution is almost plug and play. If there is any budget increase in you buying additional equipment, you will save on manpower easily. Worldsensing is reliable, it’s quick, and for that reason you’re able to cut back on a lot of costs. Read success story

Tyree Williams
Sales Manager, Specto Technology

The integration and reporting have been seamless and highly reliable since the start of our project. Trust in the structural health monitoring system lets the mine owner focus on the next steps of the mine construction. Read success story

Vincent Le Borgne
Mining R&D Manager, GEO-Instruments Canada (formerly GKM Consultants)