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SOILTEST SOIL RESISTANCE METER RESISTIVITY RESEARCH STATA-SCOUT R-40CY R-40, US $3900 – Picture 0
SOILTEST SOIL RESISTANCE METER RESISTIVITY RESEARCH STATA-SCOUT R-40CY R-40, US $3900 – Picture 0

Soiltest Soil Resistance Meter Resistivity Research Stata-scout R-40cy R-40

US $3900

  • State College, Pennsylvania, United States
  • Nov 14th
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30 day warranty Manufacturer: Soiltest (also ELE International, Danaher) Model: R-40CY Strata-Scout SN: 8712 It requires a battery.  I'm shipping the old (bad battery) with the unit. The output works. The meters work. You need probes (insulated wire with steel pins tip). Background info from University of Toledo (thank you U of Toledo): The Soiltest R-40 earth resistivity system is powered by a 6-volt battery. Output ranges up to 120 volts, 60 milliamp maximum, as a 57 Hz square wave. The R-40 was designed to measure resistance through an internal bridge.  A pair of 15 meter cables is usually used to transmit current, and a pair of 5 meter cables used to measure potential drop. When necessary, the longer R-60 cables can be used. Electrical resistivity is usually measured by transmitting an electrical current into the earth through a pair of electrodes and measuring the potential drop across a second pair of electrodes. The apparent resistivity of the ground is then calculated by dividing the voltage by the current and multiplying the result by a value determined by array geometry - arrangement of and spacing between electrodes. Because the signal is "AC", electrode polarization presents no problem. Short steel pins driven a few cm into the surface are used for both transmitting current and measuring the potential drop. Schlumberger, Wenner, Lee-partitioning and dipole-dipole configurations have been used with the R-40. The choice of array depends on the nature of the study and the limits of the R-40: Dipole-dipole with the R-40 has been successful only for very shallow imaging at archaeological sites. Regards, Paul Shipping is $12 in the CONNECTED USA STATES

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