Pore pressure measurements are used in dam monitoring. Increased pore water pressure is a risk to dam stability.

Measuring device: pore pressure sensor

The typical measuring range of pore pressure sensors is 0-5 bars Several pore pressure heads can be connected to a measuring point at various levels. Pore pressure sensors, that is, piezometers, are inserted into the ground by using threaded steel tubes that are attached to the sensors. The central processing unit of this device transfers the measurement data automatically to FinMeas Online, that provides you with an easy access to up-to-date measurement data from any device.

Benefits

Measuring devices can be used for monitoring the water level of groundwater, water systems and reservoirs.

The typical measuring range of water pressure sensors is 0-5 bars. Several pressure sensors can be connected to a central processing unit. The central processing unit of this device transfers the measurement data automatically to FinMeas Online, that provides you with an easy access to up-to-date measurement data from any device.

Benefits

Displacement measurement is used to monitor the ground movements. Automatic displacement monitoring of dam structures keeps you up-to-date on possible changes that may expose stability risks.

Measuring device: Automatic inclinometer

The measuring device is an automatic inclinometer, that is, a flexible tube which includes biaxial inclination sensors. Typically, sensors are installed inside the tube at intervals of one metre. The measuring tube is placed vertically in the ground so that it moves and bends according to the movement of the soil layers. The displacement profile is calculated from the information provided by the sensors inside the tube. The central processing unit of this device transfers the measurement data automatically to FinMeas Online, that provides you with an easy access to up-to-date measurement data from any device.

Benefits

Dam safety can be promoted by monitoring settlements in order to stay up-to-date on possible changes that may weaken the safety of the structures.

Measuring device: GPS-based settlement monitoring

The focus of the GPS-based solution is tracking one single point. The accuracy that can be achieved with the solution is +-1cm. We also deliver the necessary base station.

Measuring device: Automatic settlement hose

For measuring settlements, FinMeas delivers measuring devices which contain precise pressure sensors connected to a long fluid hose. The fluid hose measuring device can be hundreds of metres long, and the interval between sensors can be dozens of metres. The sensors detect even settlements of 5 mm.  The measuring device can be installed under ground or directly to the structure. The central processing unit of this device transfers the measurement data automatically to FinMeas Online, that provides you with an easy access to up-to-date measurement data from any device.

Benefits

• Real time and exact information of possible settlements
• The sensors detect even settlements of 5 mm
• Therefore, it is ideal for locations where information is gathered from several points
• The service can be configured with threshold values which, when triggered, automatically send an alarm to mobile phones or emails of persons in charge
• Remote reading reduces unnecessary costs, delays and risk of errors
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With the help of temperature profile monitoring, in addition to frost information, you can get information about the water moving in the dam. If there is moving seepage water in the dam, there will be noticeable changes in the temperature profile. This helps detect potential leaks that are not visible on the surface.

Measuring device: temperature profile

A measuring device is either a tube or a cable which is customised according to a customer’s requirements and which contains precise digital temperature sensors. The length of a measuring tube can vary from a couple of dozen centimetres to several metres. Typically, sensors are set inside the tube at intervals of five centimetres. The length of a measuring cable can be hundreds of metres. The central processing unit of this device transfers the measurement data automatically to FinMeas Online, that provides you with an easy access to up-to-date measurement data from any device.

Benefits

• Due to exact digital sensors, the reliability of measurement results is superior compared to conventional systems
• The measuring devices only have one cable that needs to be connected, so they are easy to install and transfer
• A separate sensor and a cable are no longer required for each location to be measured; this resolves also the problems related to handling thermo pairs
• FinMeas Online generates easily understandable measurement data visualizatios
• Remote reading reduces unnecessary costs, delays and risk of errors

With the camera, it is possible to monitor a real-time situation on the location. This can become important when combined with different measurements of the river beds, so you can easily see if the river bed is frozen or, for example, flooded. The camera image is displayed with other measurement data in the FinMeas Online service.