Users’ Manual
ESM-40S High sensitivity settlement monitoring system
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2.8 ESM-40S/6 Pressure vessel with compressor
ESM-40S/6 Pressure vessel and compressor is required when the settlement system uses more than two
sensors, to push the fluid till the last sensor (over long distances). The pressure vessel has the capacity of
10 litre. It consists of two valves – to connect to reservoir and to the compressor.
This system can be arranged locally by user, or can be procured from Encardio-rite separately.
2.9 De-aired fluid
A fluid mixture containing 50% ethylene glycol and 50% de-aired distilled water is recommended for the
settlement monitoring system. The mixture has a relative density of around 1.06 at 4°C. Ethylene glycol is
a good wetting agent and also an antifreeze. The system responds better if the tubes are free of air bubbles.
The fluid mixture can be arranged locally by user, or can be procured from Encardio-rite separately. The
quantity required will depend on the total length of fluid tube and the capacity of reservoir.
In case the installation location does not experience extreme cold climate, simple de-aired distilled water
can also be used as the fluid.
2.10 Model ESDL-30 Datalogger
The bus cable from the settlement sensors is connected to the Encardio-rite model ESDL-30 datalogger
for remote online monitoring. ESDL-30 datalogger is a compact datalogger that can be mounted easily
near the sensor or in a control room in close vicinity.
The datalogger’s configuration software is user friendly, which makes the commissioning of digital
settlement monitoring system quite easy and fast.
At locations covered by a mobile network, the data from the ESDL-30 datalogger can be transmitted
remotely to a central/cloud server.
Figure 2-6 Pressure vessel with valves and compressor
