06.07.11

GHD 4 hydrostatic flexible tube water level

The GHD 4 hydrostatic flexible tube water level is pressurised through the gravitational load of a filling medium in a reference container and is connected via hoses to individual pressure sensors arranged in series. The measurement value displayed is equivalent to the height difference of an individual system measurement point referenced to the open surface area of the reference measurement point or that in the compensating vessel. In the case of the electronic GHD 4 flexible tube water level, the hydrostatic gravitational pressure is determined as a differential value compared with the reference measurement point, and changes in the absolute fluid level at the reference measurement point are compensated for arithmetically. Air pressure compensation with the system is achieved via a central point. The connection for this purpose is made via a capillary tube within the measurement cable. The long period of development that the GHD 4 has undergone makes it the optimum solution for undertaking reliable settlement measurements whilst taking into consideration all of the possible influencing factors. The system can also be retrofitted in inaccessible areas because maintenance can carried out from a central point. A flat-lying underfloor installation is also possible, thanks to the system‘s low structural height.

• Central, continuous flushing at the reference point for bleeding air from the system

• Inspection window for bleeding air

• Blue LED operating indicator Secure and fast transmission of the simultaneously recorded data through delays of fractions of milliseconds made possible by our Glötzl bus technology

• Robust design of the case, suitable for use on construction sites

• Interfaces and components in a fully enclosed system

• Measurement ranges of 200 to 1000mmWs with high accuracy

• Analogue attenuation, can be pre-set at values between 100 and 1Hz where there are permanent or temporary vibrations in the surrounding area

• The digital version provides an additional freely selectable „floating average“ of up to 40 measurements per second, retrospectively

• Recalibration is not necessary nor must compensation calculations be applied to the results, because the specific sensor parameters are processed within the controller itself

• The measurement value is displayed directly in mm

• Almost simultaneous recording of the values from all sensors in a system is possible, which makes the online display of the building‘s movements possible

  More informations: transducer >  settlement and expansion