T: +31 (0)182 640 964 · E: sales@profound.nl · support@profound.nl

Settlement Monitoring

Settlement Monitoring
IS-Liquid Level Sensors

The digital IS-Liquid Level System is an effective tool for precision monitoring of vertical movement. Typical application areas
include monitoring of tunnelling and excavation activities, as well as compensation grouting near structures.

For each project sensors are selected with the appropriate measuring range to ensure accurate settlement measurements: the elevation differences are possible within the measuring range, keeping in mind the expected settlements.

Key advantages

  • Direct response to settlements (no water flow between sensors)
  • Intelligent Sensor Technology with output in engineering units (mm)
  • Measuring ranges adaptable to different projects
  • Automatic temperature-measurement and correction
  • Easy to transport
  • No condensation problems
  • No electronics in high-humidity environment
  • Easy de-airing of tubes
  • Easy check-up for air bubbles in the system

During installation the sensors are interconnected by means of a pressure and an
air compensation line and a digital IS-data cable.

Real-time precision monitoring of settlements
The elevation changes of the individual sensors in the system
are derived from the liquid pressure. This is done by
comparing the liquid pressure at each sensor with the pressure
at the reference sensor. The system responds immediately to
settlements, as there is no liquid flow between the sensors.
The sensor also directly digitises the measurement data and
performs an automatic temperature compensation.


The wireless, built-in GPRS-connection in the accompanying
IS-module allows remote monitoring of the project. This
Internet Solar IS-module is a combined power supply, data
logger, GPRS modem and provides a data backup for the

Data handling

Data are uploaded at preset intervals for online monitoring. You can also choose to receive the data via e-mail on your PC, when and where you want.


Typical applications areas for the Profound IS-Liquid Level sensors include monitoring of tunnelling and excavation activities, as well as compensation grouting near structures.

Read more about actual projects – for example the Victoria Station Upgrade, Subway Tunnelling San Francisco, Penang Bridge Malaysia on our Projects page.


Contact us for the latest product details at sales@profound.nl