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The water-quality probe is based on the industry-standard Ocean Seven 302™ probe manufactured by Idronaut Srl. The tool is available in ‘saline’ and ‘fresh-water’ versions with different conductivity ranges and available measurements. The probe enables a rapid, continuous profile to be taken of all the selected parameters throughout the borehole either for direct use or as a guide for subsequent sampling.

Principle of Measurement:

The probe contains up to seven specific sensors to acquire fluid-property measurements from a water-well. Use of the latest robust membrane sensor technology and low drift electronics eliminates the need for complex field calibrations. Correction of measurements to standard temperature and pressure is carried out automatically on the RG Micrologger surface system.


  • Continuous log of fluid properties
  • Measurement in-situ reduces sample storage requirements and contamination


  • Temperature
  • Pressure
  • Fluid conductivity
  • Oxygen(ppm)
  • pH
  • Redox potential, nitrate (on ‘fresh-water’ tool only)



  • Water-quality measurements
  • Location of aquifers
  • Groundwater flows
  • Contamination studies


Temperature: 0-50⁰C
Max.pressure: 10MPa
Response time constant: 50ms (temperature pressure, conductivity)
Others 3s
Pressure: Range: 0 to 1500dbar
Temperature: 1-49⁰C
Conductivity Range: 0 to 6.4mS/cm (fresh-water)
0 to 64mS/cm (saline water)
Dissolved-oxygen Range: 0 to 50ppm
pH Range: 0 to 14pH
Redox measurement: Range: -1000 to 1000mV
Nitrate measurement: Range: 0 to 100mg/li

Operating Conditions

  • Borehole type: open/cased, water-filled

Sales Information

I002064 Water-quality probe
(fresh-water version)
I013204 Water-quality probe
(saline water version)

Download Water-quality sheet


...Practical Innovation with Global Service & Support...

Robertson Geologging Ltd., 2017

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(+44) 1492 582 323