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Terra EZ Res Pro Resistivity Survey Meter
Easily Finds Underground Anomalies such as Gold Veins or Deposits, Caves and Tunnels, Water, and Buried Treasure!
The EZ RES PRO is the easiest to use earth resistivity scanner available today. It will accurately find underground anomalies such as caves or tunnels, mineral veins and deposits, water deposits, and even buried caches at depths from 1 to 50 meters or more (with additional optional wire). To accomplish this, powerful electrical pulses are sent through the ground at varying frequencies and the resistance to the current is measured in Ohms (or Ohms Meters). The use of the EZ RES PRO is as simple as putting 2 to 4 probes into the ground, connecting wires to them, and pressing a button. The results are immediately displayed on the screen.
*Voxler 4 3D Data Imaging Software Now Included ($500 Value)
- 2 Year Warranty
- Data Logger can Store up to 300 Scans
- Designed, Created and Supported in the USA
- Will Perform up to 5000 Scans from 6 Changeable C Cell Batteries
- Accurately finds Underground Anomalies at Depths from 1 to 300 Meters or More
- Supports All of the Standard 2, 3, and 4 Probe Arrays that are Used by Professional Surveyors
- Gear Bag
- 10 Survey Flags
- 2 - 25 Meter Cables
- 2 - 50 Meter Cables
- 5 Steel Probes with Case
- 2 - 50 Meter Measuring Tapes
- Main Host Unit in Waterproof Case
- 2 - Jumper Wires (for 2 probe surveys)
- Voxler 4 3D Data Imaging Software CD-ROM ($500 Value)
|Factory Included Accessories||No|
|Search Coil Type||No|
|Search Coil Size (in)||No|
|Search Coil Shape||No|
|Search Coil Build||No|
|Waterproof Search Coil||No|
|Interchangeable Search Coil||No|
|Technology||Multiple Pulse Induction|
|Arm Rest Strap||No|
|Assembled Length Max (in)||No|
|Assembled Length Min (in)||No|
|Control Box Mount||No|
|Number of Frequencies||No|
|Programmable Target Id||No|
|Target Id Segments||No|
|Search Mode Types||Depth Reading, Ground Balance Pulse Induction, Pulse Induction|
|Battery Life (hr)||300|
|Exclusive Features||2 Year Warranty, Depths from 1 to 300 meters or more, Perform up to 5000 scans, Data logger stores up to 300 scans, Voxler 4 3D Data Imaging Software|
Terra EZ Res Pro Resistivity Survey Meter
Easily Find Underground Anomalies such as Gold Veins or Deposits,
Caves and Tunnels, Water, and Buried Treasure!
A resistivity survey is done by simply moving the probes outwards and taking multiple readings. For example, start probes at 1 meter, take a reading, move to 2 meters, take another reading, 3 meters, etc. The effective depth is calculated as 50% of the probe spacing. Anomalies are identified by large changes in the resistance (Ohms) readings. If the current runs through a void like a cave of tunnel, the readings (Ohms) will go way up. If the current goes through water or metal, the readings will go way down.
The EZ RES PRO supports all standard resistivity arrays such as Wenner, Schlumberger, Diplole Diploe, Gradient, etc.
The EZ RES PRO will perform up to 5000 scans from 6 changeable C cell batteries and can store up to 300 readings on its on board data logger. The data can then be downloaded to a computer and imported into professional geophysical graphics programs like Voxler or AGI Earth Imager to produce REAL 2D and 3D images.
If you are looking for a powerful and accurate machine to find underground anomalies at extreme depths, the EZ RES PRO is the machine for you!
The EZ RES PRO is the Easiest to Use Resistivity Meter Available Today
Just insert 2-4 probes into the ground, connect the wires, and press a button. It's that easy! Instant results are displayed on the screen and can be saved to memory for future analysis.
The EZ RES PRO resistivity meter uses a powerful 600v electrical current, that is sent into the ground via 2 - 4 steel probes, to accurately locate underground anomalies such as caves or tunnels, mineral veins and deposits, water deposits, or even buried caches at depths of 1 to 300 meters or more.
Changes in the resistance of the electrical current are read in Ohms and immediately displayed on the screen. Anomalies that are less conductive, like a cave, will display a much higher Ohms value than the surrounding soil. Metal or water will show a much lower Ohms value.
The depth of the anomaly is easily calculated by dividing the probe spacing by 2. So basically, if the probes are 10 meters apart, the effective depth would be 5 meters.
The Data Obtained from the EZ RES PRO can be Used to Easily Create REAL 2D and 3D Images!
With professional geophysical imaging software like Voxler or AGI Earth Imager, REAL images can be created detailing underground objects of interest. The EZ RES PRO produces real results, not gimmicks!
Case Study : Demonstrating the EZ RES PRO Over a Known Cave
Terra Exploration group tested the EZ RES PRO on a know cave in Austin, Texas. The cave was approximately 20 meters below the surface. Below is a picture of the entrance to the cave. We were able to climb to the top of the cliff to perform our resistivity survey.
We began our survey with a probe spacing of 20 meters in order to obtain a depth of approximately 10 meters. Starting at a shallower depth than the target allows us to understand the normal soil conditions. Our first reading was 110.7 k Ohms.
Next, we increased our probe spacing to 30 meters which would give us a depth of approximately 15 meters. The Ohms increased to 157.5 k Ohms which would indicate that we were beginning to see the cave, but only partially...
For our next scan, we increased the probe spacing to 40 meters. This would give us a depth ofapproximately 20 meters, which should be right in the middle of the cave. Our reading was 243.1 k Ohms which is more than double the initial reading of 110.7 k Ohms at 10 meters. This would indicate that we were definitely reading into the cave.
Case Study : Using the EZ RES PRO to Find Water
Terra Exploration Group tested the EZ RES PRO on a water well in central Texas. The well was newly drilled and known to be at a depth of approximately 50 meters... Below are the results of our scans...
With probe spacing set at 70 meters (35 meters depth) the reading was 391.8 k Ohms. At 80 meters probe spacing (depth of 40 meters) the reading was 391.0 k Ohms.
With probe spacing of 90 meters (depth of 45 meters) the reading was 348.8 k Ohms. Notice how the number has gone down. This would indicate that we are getting into wetter soil.
With probe spacing set at 100 meters (depth of 50 meters) the reading dropped considerably to 272.0 k Ohms. This would indicate water at the known depth of 50 meters.
With the probe spacing set at 120 meters and again at 130 meters, the readings jumped back up to 492 k Ohms and 493 k Ohms, which would be much drier soil. This would indicate that the 100 meter scan was indeed in the pay zone of the water well. Upon further discussion with the owner of the well, we learned that it was indeed a small pay zone and not a very large amount of water. The EZ RES PRO was able to find it with no problems!
Case Study : Using the EZ RES PRO to Find a Lost WWII Tunnel
Terra Exploration Group was contracted to attempt to find a lost tunnel in the Philippines that was dug during WWII to hide Japanese war loot. We began our resistivity survey in the area that was expected to have the tunnel and were able to quickly locate a high resistance anomaly at a depth of approximately 40 meters that would be consistent with a tunnel. We began to clear the jungle and uncovered a concrete cap that appeared to be covering a tunnel entrance.
Our next step was to drill down to try and hit the tunnel. At a depth of approximately 40 meters, we pierced into the cavity. It was under a lot of pressure (we guess from decaying organic matter) and shot water and gas out of our drill hole for about 1 to 2 minutes.
Due to the secrecy involved in the project, we were not present for the excavation but there were indeed tunnels found at the location and depth indicated by the EZ RES PRO. Above are a few of the photos that we are able to share.
|Influence Description||Working Conditions|
|Ambient Temp||15°F - 105°F|
|Working Voltage||9V ± 1.5V|
|Auxiliary Earth Resistance||<30kΩ|
|Electrode Distance when Measuring R||a>5d|
|Electrode Distance when Measuring ρ||a>20h|
|Function||Measurement of 2/3/4-Pole Earth Resistance, Soil Resistivity, Earth Voltage, AC Voltage|
|Power Supply||DC 9V (6 High Quality Alkaline C Cells 1.5V continuous standby for 300 hours)|
|Measurement Range||Earth Resistance: 0.00Ω - 30.00kΩ|
|Soil Resistivity: 0.00Ωm - 9000kΩm|
|Measuring Modes||Precise 4-Probe Measurement, 3-Probe Measurement and Simple 2-Probe Measurement|
|Measuring Methods||Earth Resistance: Rated Current Change-Pole Method, Measurement Current 20mA Max|
|Soil Resistivity: 4-Pole Measurement (Wenner or Schlumberger Arrays)|
|Earth Voltage: Average Rectification (between P(s)-ES)|
|Short-Circuit Test Current||AC 20mA max|
|Open-Circuit Test Current||AC 40V max|
|Test Voltage Wave||Sine Wave|
|Electrode Distance Range||Outside Probes can be Set up to 330' Apart|
|Shift||Earth Resistance: 0.00Ω - 30.00kΩ, Automatic Shift|
|Soil Resistivity: 0.00Ωm - 9000kΩm, Automatic Shift|
|Backlight||Blue Screen Backlight, Suitable for Dim Light Use|
|Display Mode||4-Digital Super-Large LCD Display, Blue Screen Backlight|
|Measuring Indicator||During Measurement, LED Flash Indicator, LCD Countdown Display, Progress Bar Indicator|
|LCD Frame Dimension||5" x 3" mm|
|LCD Window Dimension||4.9" x 2.6"|
|Dimension||LxWxH : 8.5" x 7.5" x 3.75"|
|Standard Test Wire||4 Wires: Red 200', Black 200', Yellow 100', and Green 100'|
|Simple Test Wire||2 Wires: Red and Black 5.2' Each|
|Landscape Spikes||4 Probes: 3/8" x 12"|
|Measuring Rate||Voltage to Ground: About 3 Times/Second|
|Earth Resistance, Soil Resistivity: About 5 Seconds/Time|
|Measuring Times||Over 5000 Times (short-circuit test, interval time should be at least 30 seconds)|
|Circuit Voltage||Below AC 600V|
|RS232 Interface||RS232 Interface, Software Supervision, Storage Data can be Uploaded to Computer, Saved or Printed|
|Communication Wire||One RS232 Cable|
|Data Storage||300 Measurements, "MEM" Icon Storage Indicator, Flash Display "FULL" Icon to Indicate Storage is Full|
|Data Hold||Data Hold Function: "HOLD" Icon Display|
|Data Read||Data Read Function: "READ" Icon Display|
|Overflow Display||Exceeding Measuring Range Overflow Function: "OL" Icon Display|
|Interference Test||Recognize Interference Signal Automatically, "NOISE" Icon Display when Interference Voltage Exceeded 5V|
|Auxiliary Earthing Test||Can Measure Auxiliary Earth Resistance, 0.00kΩ - 30kΩ (100R-rC<50kΩ, 100R+rP<50kΩ)|
|Alarm Function||When Measuring Value Exceeds Alarm Setting Value, an Alarm will Sound|
|Battery Voltage||When Battery Voltage Decreases to about 7.5V, Low Battery Voltage Icon will Display, Indicating Battery Replacement is Necessary|
|Power Consumption||Standby: about 20mA (backlight shut off)|
|Boot-up and with Backlight: About 45mA (25mA without backlight)|
|Measurement: About 100mA (backlight shut off)|
|Weight||Total Weight: 12 lbs. (including package)|
|Tester: 3.2 lbs. (including batteries)|
|Testing Wires: 5.3 lbs.|
|Copper-Clad Probes: (4 pcs) 5 lbs.|
|Working Temperature & Humidity||15°F - 115°F, below 80% rh|
|Storage Temperature & Humidity||-4°F - 140°F, below 70% rh|
|Overload Protection||Measuring Earth Resistance: Between Interfaces of C(H)-E, P(S)-ES, AC 280V/3 Seconds|
|Insulation Resistance||Over 20MΩ (between circuit and enclosure it is 500V)|
|Withstanding Voltage||AC 3700V/rms (between circuit and enclosure)|
|Protection Type||IEC61010-1 (CAT III 300V, CAT IV 150V, Pollution 2)|
|IEC61010-031, IEC61557-1 (Earth Resistance)|
|IEC61557-5 (Soil Resistivity), JJG 366-2004|
Intrinsic Error and Performance Indicators Under Base Conditions
|Category||Measurement Range||Intrinsic Error||Resolution|
|Earth Resistance (R)||0.00Ω - 30.00Ω||±2%rdg±3dgt||0.01Ω|
|30.0Ω - 300.0Ω||±2%rdg±3dgt||0.1Ω|
|300Ω - 3000Ω||±2%rdg±3dgt||1Ω|
|3.00kΩ - 30.00kΩ||±4%rdg±3dgt||10Ω|
|Soil Resistivity (ρ)||0.00Ωm - 99.99Ωm||According to the Precision of R
(ρ=2πaRa: 1 m-100m, π=3.14)
|100.0Ωm - 999.9Ωm||0.1Ωm|
|1000Ωm - 9999Ωm||1Ωm|
|10.00kΩm - 99.99kΩm||10Ωm|
|100.0kΩm - 999.9kΩm||100Ωm|
|1000kΩm - 9000kΩm||1kΩm|
|Earth Voltage||AC 0.0 - 600V||±2%rdg±3dgt||0.1V|
1. When rC max or rP max, additional error ≤±3%rdg±5dgt
(rC max: 4kΩ+100R <50kΩ, rP max: 4kΩ+100R <50kΩ)
2. When 5V interference voltage, additional error ≤±5%rdg±5dgt
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