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Probes

RG Electric Logging Probe

Water-Quality Probe

The water-quality probe is based on the industry-standard Ocean Seven 303 probe manufactured by Idronaut Srl. It can be configured with different options and includes fluid temperature and pressure measurements as standard and up to four additional sensors selected from the following list: fluid conductivity, dissolved oxygen, pH, redox potential, nitrate. 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 six 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 RG-Videologger and RG-Micrologger surface systems.

   
FEATURES
Continuous log of fluid properties.
Measurement in-situ reduces sample storage
requirements and contamination
MEASUREMENTS
Temperature
Pressure
Fluid conductivity
Oxygen(ppm)
pH
Redox potential
Derived:
Differential temperature
Fluid resistivity
Oxygen saturation
APPLICATIONS
Water Water-quality measurements
Location of aquifers
Groundwater flows
Contamination studies
OPERATING CONDITIONS
Borehole type Open/cased hole, water-filled
In normal logging operations, the borehole should be allowed to stand for 24 hours to reach stable conditions and this probe should be run first. The log is recorded downwards while running into the hole to minimise fluid disturbance.
SPECIFICATIONS
Diameter 43mm
Length 1.66m
Max. temperature 70ºC
Max. pressure 15MPa
Response time constant 50ms (temperature, pressure, conductivity), 3s (others)
Pressure measurement Range:0 to 1500dbar,
Accuracy: 0.25% full scale
Temperature measurement Range: -1 to 49ºC (extended ranges available)
Accuracy: 0.02ºC
Conductivity measurement Range: 0 to 62mS/cm,
Accuracy: 0.02mS/cm
Dissolved-oxygen measurement Range: 0 to 50ppm,
Accuracy: 0.1ppm
pH measurement Range: 0 to 14pH,
Accuracy: 0.01pH
Redox measurement Range: -1000 to 1000mV,
Accuracy: 10mV
SALES INFORMATION
Probe
25 051 001 Water-quality probe with temperature and pressure sensors
24 051 003 Conductivity sensor
25 051 004 Dissolved-oxygen sensor
25 051 005 pH sensor
25 051 006 Redox sensor
25 051 007 Iodine sensor
25 051 008 Copper sensor

 

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  Robertson Geologging Ltd, Deganwy, Conwy, LL31 9PX
Robertson Geologging (USA) Inc, 11115 Mills Road, Suite 117, Cypress, Texas 77429, USA