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Water Dissolved Gas Continous Monitoring Station


The instrument allows measurement of water dissolved carbon dioxide and of the related water parameters.


  • in vulcanology to understand the dynamics of volcanoes and for a global evaluation of the hazard connected with volcanic activity;
  • monitoring of geothermal areas;


This is a completely automatic station which performs the measurements cycle, acquires and stores the data on a non-volatile memory. By means of a telemetry system the data can be transferred to a Reception Center up to 20 miles away, or can be anywhere on the planet by using our innovative internet based telemetry systems.


The system is based on the principle of a dynamic equilibrium between water and the air as the host gas.

The amount of CO2 in the circulating gas phase is measured by the IR spectrometer, and it increases with time until it reaches the value corresponding to that at complete equilibrium with CO2 in water: PCO2(gas) PCO2(water).

The concentration of CO2 is automatically measured in the air inside the chamber both before and after each re-equilibration cycle. The values of CO2 reached at the end of the equilibration time (about 20 min) represent the partial pressures of the CO2 in the natural system being studied at the measured water temperature


The soil flux station is able to measure:

  • Dissolved carbon dioxide concetration by DRAGER IRCO2 detector.
  • Water pH
  • Water conductivity
  • Depth

Other parameters are available upon request.



SENSORS Carbon dioxide

DRAGER Polytron IR CO2

Working principles: Double beam IR Detector with solid state sensor compensated in temperature, without moving parts.

  • Full scale: Range 2000 ppm ~ 100% configurable by the operator.
  • Accuracy 3% of reading for > 350 ppm
  • Signal noise: 1% of reading pk-pk noise Out 4~20 mA linearized.
  • IP63 Case with anti spray protection IP65.
  • Operating temperature : between -20 and +65 °C.
  • Air relative humidity 0~95%.

Water Parameters

Multiparameter Water Quality Sonde.

  • Conductivity: 0 to 100 mS/cm (accuracy: 0.5% of reading + 0.001 mS/c, resolution: 0.0001 units).
  • pH: 0 to 14 pH units (accuracy: 0.2 pH units , resolution: 0.01 pH units)
  • Temperature: 5 to 50 C (accuracy: 0.1 C, resolution 0.01 C).
  • Depth: 0 - 10 m, 0 - 25 m, 0 - 100 m, 0 - 200m

Other sensors available upon request.





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