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LandMapper
Frequently asked questions (FAQ) on electrical geophysical equipment and software
Submitted by landviser on Wed, 03/21/2012 - 16:57How to convert conductivity to resistivity?
Are there any difference between LandMapper ERM-01 and other equipment available on the market?
How your equipment calculates electrical resistivity?
How to calculate geometrical coefficient K?
Does electrical resistivity correlate with any soil properties?
Can your equipment measure electrical resistivity/conductivity in soil and water samples?
How to determine the depth of the measurements?
How to convert conductivity to resistivity?
Electrical resistivity (ER) is reciprocal to conductivity (EC) and results can be easily recalculated using formula EC=1/ER or vice versa ER=1/EC. Electrical resistivity is more convenient to use on non-saline soils, where conductivity can be mSm/m, while resitivity measures in 102-103 Ohm m range. 1000 Ohm m equals 1 mSm/m. You can find more conversions to ppm, TDS, grains of salt in this flyer.
Unique compact geophysical devices
Submitted by landviser on Fri, 03/09/2012 - 16:23Landviser's products include portative devices for measuring electrical properties (electrical resistivity, conductivity, and potential) in soils, plants and other semisolid and liquid media. This equipment is small, fully computer-integrated, and easy to use. It is very competitively priced and come handy in many environmental and agricultural applications, including mapping of residential and commercial properties, construction sites, farms, and golf courses.
We can also help you with geophysical equipment and software distributed by our Partners. We develop and conduct online and in-person training classes for our clients and distributors. We sometimes offer used GPS units and geophysical equipment of other companies out of Landviser's inventory. Contact us for comprehensive help for your research and surveying needs.
LandMapper ERM-02 - new handheld EC/ER/SP meter
- Agriculture
- Precision Ag
- Civil Engineering
- Geology/Mining
- Geophysics
- Soil Science
- vertical electrical sounding
- LandMapper
- soil EC mapping
- arrays
- dipole-dipole
- ERM-02
- Schlumberger
- electrical profiling
- Geophysical equipment
- subsurface imaging
- four-electrode probe
- Geophysical methods
- EC
- site assessment
- ER
- SP
*We have a new bath of LandMappers ERM-02 in stock! Please, contact us info@landviser.com or +1-609-412-0555 / 888-306-LAND to discuss suitability of ERM-01 or ERM-02 for your applications. *******
LandMapper ERM-02 is a newest device in the product line of Landviser, LLC. This portative device can measure three important electrical properties of solid, semisolid, and liquid media: electrical resistivity (ER), conductivity (EC), and potential (EP). Using the most accurate four-electrode principle LandMapper ERM-02 measures ER or EC to help you to delineate areas with contrasting soil properties within the fields quickly, non-destructively, and cost-efficiently. Using the device prior to soil sampling you can significantly reduce the amount of samples required and precisely design a sampling plan based on the site spatial variability.
LandMapper ERM-02 measures electrical resistivity or conductivity of soils and related media for express non-destructive mapping and monitoring of agricultural fields as well as construction and remediation sites. In a typical setting, a four-electrode probe is placed on the soil surface and an electrical resistivity or conductivity value is read from the digital display. The device measures electrical resistivity or conductivity in a surface soil layer of the depth from 2 cm down to 20 m, which is set by varying the size of a four-electrode probe.
LandMapper ERM-02 is the most versatile device in LandMapper series and allows you not only measure ER and EC using artificially applied electrical current and four-electrode probes, but also study natural electrical fields in soils (self-potentials) and plants (bio-potentials) with patented non-polarizing electrodes. Electrical balance between soil and plants is important for plant health and electrical potential gradient governs water and nutrient uptake by plants. Monitoring of electrical potentials in plants and soils is a cutting-edge research topic in the leading scientific centers around the world.
Make your own four-electrode probe for soil mapping
Submitted by landviser on Wed, 07/01/2015 - 18:43- ¾” PVC pipe, one section of 10’.
- 2 T-shaped PVC pipe connectors fitting ¾” pipe from all three ends.
- 2 ¾” PVC cups (optional).
- #18 AWG isolated stranded wires, red and black, 15’ each.
- 1”x2” Velcro strip (optional).
- 3 #6 1.5” screws for wood (optional).
-
4-electrode probe kit (available from Landviser, LLC) including:
- - 4 stainless steel electrodes (sharpened d= ¼” L=6” bolts)
- - 8 stainless steel ¼” nuts for connecting electrodes with the wires
- - 4 nylon isolated terminals for 18” AWG wire with 5/16” opening
- - 4 banana plugs (2 black, 2 red) for connecting with LandMapper terminals
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The effect of long-term liquid manure application on permanent perennial grasses agrocenosis and sod-podzolic sandy-loam soil properties by traditional and electric methods
Submitted by landviser on Thu, 04/23/2015 - 16:42Happy New Year 2015!
Submitted by landviser on Tue, 12/30/2014 - 18:25Landviser now offers complete line of electrical geophysical equipment and software: from our exclusive simple hand-held resistivity and self-potential meters, LandMappers, to the most sophisticated 16-channel, 64-electrode automatic RES/IP tomography set, SibER-64! Also:
GPS data loggers: cost-effective rugged data loggers, inclinometers, distance scanners and cameras from F4Devices
GIS & Geophysics consulting: on-site and remote classes and support available worldwide
Customized Solutions: No project is too big or too small!
Call: +1-609-412-0555 or 888-306-LAND
Email: info@landviser.net Web: www.landviser.net
Landviser, LLC (USA) is authorized distributor for KB Electrometry (Russia), GeoTOMO Software (Australia/Malaysia) and F4Devices (USA)
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- Русский
2D Dipole-Dipole Electrical Tomography with LandMapper
Submitted by landviser on Mon, 06/02/2014 - 21:40Manual measuring of electrical resistivity 2D cross-section is possible with LandMapper with supplied (optional) or made by user cable set.
There are two modifications of 2D cable set offered and tested by Landviser, LLC:
-
Mobile shallow (~2 m depth) set consisted of two T-style probes (AB and MN dipoles) similar to mapping probes. The dipoles are set at 1 m size with possible separation between dipoles (wire length) no more than 5 meters (n=5).
- Stationary set (~ 14 m depth) where electrodes are hammered on the soil surface along the straight line at one meter distance. Electrodes are simple metal spikes/nails and is sourced locally (are NOT provided by Landviser, LLC). We supply wires with banana-plug connections to LandMapper terminals on one end and alligator clips on the other end to connect with electrodes.
Principle of measurements with both sets is the same for both cable sets and is illustrated by figure below. You can also watch instructional videos on our YouTube Channel - LandviserLLC
Location
Sign up for webinar "Application of Geophysical Methods to Agriculture: Methods Employed"
Submitted by landviser on Fri, 02/07/2014 - 19:17- Agriculture
- Farming
- Agrochemistry
- Precision Ag
- Soil Pollution
- Water Pollution
- Reclamation
- Environmental Science
- Geophysics
- Soil Science
- vertical electrical sounding
- LandMapper
- soil EC mapping
- ERM-01
- ERM-02
- GPR
- electrical profiling
- Geophysical equipment
- subsurface imaging
- four-electrode probe
- EC
- site assessment
- ER
- SP
- Geophysical
- iVES
- RES2DINV
- RES3DINV
- resistivity inversion
- freeware
- Ag Geophysics group
- EC
- mapping
- monitoring
- resistivity
- self-potential
Dr. Larisa Golovko (President of Landviser, LLC) will be presenting "Geophysical Methods of Electrical Resistivity and Self-Potential in Agriculture" in first of
Agricultural Geophysics Webinar Series: "Application of Geophysical Methods to Agriculture: Methods Employed"
A live webinar on the application of geophysics to agriculture will be offered on:
Tuesday, February 18, 2014, from 3pm - 4:30pm EST
(2:00 - 3:30 CST, 1:00 - 2:30 MST, 12:00 - 1:30 PST)
This first in a series of agricultural geophysics webinars will focus on the near-surface geophysical methods presently being used for agricultural purposes, which include resistivity, self-potential, electromagnetic induction, ground penetrating radar, dielectric sensors, VIS/NIR/MIR spectrometry, gamma ray spectrometry, mechanical soil compaction sensors, and ion selective potentiometry. Five presenters will provide a short overview of agricultural geophysical methods during the first 30 minutes of the webinar. The last hour of the webinar will be devoted to a panel discussion with the presenters, who will answer questions from the audience.
Location
- landviser's blog
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Happy New Year 2014 from Landviser LLC
Submitted by landviser on Tue, 12/31/2013 - 17:54Dear visitors, clients, collegues and friends!
Landviser LLC is wishing you Happy, Healthy and Prosperious 2014! Let all your ideas to develop into innovative products and services to create more Joy on our planet Earth and gain yet more understanding about our World. We continue to develop and test our equipment for different environmental applications in collaboration with leading research organizations worldwide. This year we would like to congratulate Department of Soil Physics and Reclamation in Moscow State University (M.V. Lomonosov), Faculty of Soil Science with 70th Anneversary:
Also, this year we added two innovative geophysical devices to our offerings in collaboration with OOO Electrometry and Gelion holding (Russia):
Electromagnetic multi-frequency profiler AEMP-14
Electrical tomography SibER-48 equipment
Do not hesitate to ask us about applications of geophysics in archaeology, agriculture, and environmental sciences. We are here to "Enlighten Your Research".
Locations
- landviser's blog
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Technical Specifications of LandMapper ERM-01
Submitted by landviser on Fri, 08/02/2013 - 18:54- · Range of measurements…...............…………………………………….………......................................ER= 0.1-1 106 Ohm m
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· Automatically adjusts electrical resistivity range to provide best measurement accuracy.
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