KD Jones Instrument Corp in conjunction with BedrockMapping.com offers geophysical equipment rental and sales for mapping bedrock. Please understand that actual weights, dimensions, and specifications may change without notice. KD Jones Instruments represents the following companies, which may help you map bedrock:

Geonics Instruments geophysical equipment rental and sales:

Geonics has been a leader in electromagnetic equipment since its formation in the 1960s. Their equipment possesses a reputation of cost effective equipment and reliability in the field. In addition to time domain and UXO metal detection, it produces ground conductivity meters. Since different layers of soils have different electromagnetic properties, its ground conductivity meters are most useful to determine the depth of surface to bedrock.  These meters’ ability to reach a certain depth is dependent upon the space between its transmitter and receiver also known as the intercoil spacing. In general, in the vertical dipole mode, a ground conductivity meter will reach 1.5 times its intercoil spacing whereas in the horizontal dipole mode a ground conductivity meter will reflect conditions to 0.75 times its intercoil spacing.

Geonics instruments used to map bedrock that K. D. Jones Instruments rents:

EM38/EM31/EM31 Short:

All three of these Geonics meters function and perform the same. They are handheld conductivity meters in which the operator walks along survey lines collecting data at different stations with a data logger. The difference between the three meters is the spacing of the transmitter and receiver, meaning they will reach different depths. For this reason, it may be important to look at bedrock depth maps to have a general idea of what meter one will need. Some users like to use GPS with the Geonics equipment while others prefer a making a grid.

Geonics EM31 on the left and an EM38 on the right. K. D. Jones Instruments geophysical equipment rental.

Geonics EM31 on the left and an EM38 on the right.

EM31 and EM31 Short Specifications:

EM31 Specifications
Maximum Depth of Investigation EM31 Short: to a depth of about 13 feet, depending on instrument height and conductivity.

EM31: to a depth of about 18 feet, depending on instrument height and conductivity.

Rental Prices $80 a day or $1,920 a month
Estimated Shipping Dimensions 60 x 9 x 14 inches
Estimated Shipping Weight 60 lbs
Power Source 8 “C” Cell Batteries
Other notes:
Measured Quantities:
1: Apparent conductivity in millisiemens per meter (mS/m)
2: In-phase ratio of the secondary to primary magnetic field in parts per thousand (ppt)
Intercoil Spacing:

EM31 Short: 6.56 feet (2 meters)
EM31: 12 feet (3.66 meters)

Operating Frequency: 9.8 kHz
Measuring Ranges: EM31 Short: Conductivity: 19, 199, 1999 mS.m; Inphase: +/- 6ppt

EM31: Conductivity: 10,100,1K mS/m; Inphase: +/- 20 ppt

Measurement Resolution: +/- 0.1% of full scale
Measurement Accuracy: +/- 5% at 20 mS/m
Noise Levels: Conductivity: 0.1 mS/m.  In-phase: 0.03 ppt
Ability to use in conjunction with GPS antenna

EM38 Specifications:

EM38 Specifications
Maximum Depth of Investigation Depths depend on instrument height and conductivity. For coil spaces of 1 m
less than 5 feet and for 0.5 m less than 2.5 feet.
Rental Prices $80 a day or $1,920 a month
Estimated Shipping Dimensions 45 x 12 x 11 inches
Estimated Shipping Weight 45 lbs
Power Source One 9v battery or a battery belt pack
Other notes:
Measured Quantities:

1: Apparent conductivity in millisiemens per meter (mS/m)

2: In-phase ratio of the secondary to primary magnetic field in parts per thousand (ppt)

Intercoil Spacing: 3.28′ and 1.61′ (1 and 0.5 meters)
Measuring Ranges:
Conductivity: 1000 mS/m
In-phase: ± 29 ppt for 1 m
In-phase: ± 7 ppt for 0.5 m
Measurement Resolution: +/- 0.1% of full scale
Measurement Accuracy: +/- 5% at 30 mS/m
Noise Level:
Conductivity: 0.5 mS/m;
In-phase: 0.02 ppt
Ability to use in conjunction with GPS antenna
Geonics EM34 Transmitter Coil.

Geonics EM34 Transmitter Coil.

EM34:

The EM34 operates similarly to the other meters but it is not handheld. Instead, it possesses a receiver and transmitter coil separated by a long cable. This cable comes in lengths of 10, 20, and 40 meters, allowing it to reach much greater depths than the other instruments. However, with the ability to reach greater depths comes a lack of mobility and potentially less value for bedrock mapping surveys of depths less than 25 feet.

EM34 Specifications:

EM34 Specifications:
Maximum Depth of Investigation: Since the coils are set on the ground, depths depend more on conductivity. Approximate depth

for a coil space of 10 m is less 49 feet, 20 m less than 98ft, and for 40 m less than 196 feet.

Rental Prices $90 a day or $2,150 a month
Estimated Shipping Dimensions 32 x 32 x 14 inches
Estimated Shipping Weight 105 lbs
Power Source Tx: 8 D batteries
Rx: 8 C batteries
Other notes:
Measured Quantities: Apparent conductivity in millisiemens per meter (mS/m)
Primary Field Source: Self-contained dipole transmitter
Intercoil Spacing and Operating Frequency:
10 m at 6.4 kHz (32.8 feet)
20 m at 1.6 kHz (65.6 feet)
40 m at 0.4 kHz (131.23 feet)
Measuring Ranges: Conductivity: 10, 100, 1k mS/m
Measurement Resolution: +/- 0.1% of full scale
Measurement Accuracy: +/- 5% at 20 mS/m
Noise Levels: Conductivity: 0.2 mS/m (can be greater in regions of high power line interference)

Advanced Geoscience, Inc geophysical equipment rental and sales:

Advanced Geoscience Inc., commonly referred to as AGI, is a leading developer of resistivity imaging.  Since 1989, they have been developing their own resistivity imaging hardware and post processing software. Furthermore, their equipment has been involved in more than 1,000 peer reviewed journal articles. Resistivity imaging meters require a user to set electrodes into the ground. Pairs of electrodes are used to inject current into the ground and to measure the resulting voltage between other pairs of electrodes. The apparent resistance is then measured between pairs of electrodes, which will differentiate bedrock from other soils. Since our system uses an array up to 84 electrodes the AGI Supersting system provides an incredible amount of data. Different depths are achieved depending on the distance between electrodes and the number of electrodes.

Advanced Geoscience, Inc instruments used to map bedrock that K. D. Jones Instruments rents:

SuperSting R8 84 and peripherals

The SuperSting is powerful electrical resistivity meter and induced polarization (IP) and self-potential (SP) system that creates 2D slices and 3D volumes to create an image of the subsurface.  Its multichannel capability has been proven in over 700 peer-reviewed journal articles, and it delivers the highest accuracy and lowest noises levels in the industry. Electrode arrays of 56, 84, or 112 takeouts can be rolled to provide a vast amount of data along a line.

AGI SuperSting R8 resistivity imaging console and switch box. Geonics EM31 on the left and an EM38 on the right from K. D. Jones Instruments geophysical equipment rental.

AGI SuperSting R8 resistivity imaging console and switch box. Geonics EM31 on the left and an EM38 on the right from K. D. Jones Instruments geophysical equipment rental.

SuperSting R8 84 Channel System Specifications:

Supersting R8 System Specifications
Maximum Depth of Investigation ???
Prep Fee $350
Rental Prices $332 a day or $7,968 a month
Estimated Shipping Dimensions SuperSting R8: 24 x 20 x 16 inches
Switch Box: 20 x 16 x 8 inches
(2) Cables 28 x 21 x 18 inches
Electrodes: 22 x 15 x 10 inches
Estimated Shipping Weight SuperSting R8: 50 lbs
Switch Box: 22 lbs
(2) Cables 70lbs
Electrodes: 60lbs
Power Source External 12v marine or car battery (not included)
Other notes:
Measured Quantities: Apparent resistivity, resistance, induced polarization (IP)
Measuring Ranges: +/- 10V
Measurement Resolution: Max 30 nV, depends on voltage level
Output Current: 1 – 2,000 mA continuous, measured to high accuracy
Output Voltage: 800 Vp-p, actual electrode voltage depends on transmitted current & ground resistivity.
Input Channels: 8 channel
Total Accuracy: Better than 1% of reading in most cases (lab measurements). Field measurement accuracy depends on ground noise & resistivity. The instrument will calculate & display running estimate of measuring accuracy.

Geometrics geophysical equipment rental and sales:

Since 1969, Geometrics has produced seismographs, magnetometers, and geoelectrical instruments to survey the earth’s subsurface. Geometrics Geode seismograph is an industry workhorse, frequently equipped with 24 channels. Both multichannel analysis of surface waves (MASW) and refraction are common methods used with the Geode to map bedrock. Along with a Geode, customers rent cables and geophones. Geophones are the sensors which pick up seismic energy and the cables connect the geophones to the seismograph. Sometimes the geophones and cable are configured on a tow strap with fixed plates. This towable array is called a land streamer.

Geometrics also makes the only capacivitely-coupled resistivity meter called the Ohmmapper.  This instrument can take soil resistivity measurements while being dragged or towed, which makes it much faster than systems that need electrodes put into the ground. In addition, it can be used with a GPS to precisely track where readings occurred.

Geometrics instruments used to map bedrock that K. D. Jones Instruments rents:

Geode

The Geometrics Geode is a small portable seismograph that can perform surveys up to 24 channels. Units are combined for longer arrays. Multiple geodes can be tethered together to create surveys up to 1000 channels or a rollbox can be used to perform larger surveys. It will run all day on a 12v battery and sleeps when not in use. Its interface connects to a laptop computer and parameters are changed in its acquisition software, Seismodule Controller.

Geometrics Geode Seismograph and Geophones from K. D. Jones Instruments geophysical equipment rental.

Geometrics Geode Seismograph and Geophones from K. D. Jones Instruments geophysical equipment rental.

Geode Specifications:

Geode Specifications
Maximum Depth of Investigation Often less than 500 ft for shallow near surface geophysical applications.
Prep Fee $100
Rental Prices $100 a day or $2,400 a month
Additional Peripherals Needed Geophones and Spread Cables (prices below)
Estimated Shipping Dimensions Geode Box: 28 x 22 x 18 inches

Geophone Box: 28 x 22 x 18 inches

Land Streamer Box: 28 x 22 x 18 inches

Estimated Shipping Weight Geode Box: 65 lbs

Geophone Box: 60 lbs

Landstreamer Box: 115 lbs

Other notes:
Measured Quantities: MASW, Refraction, or Reflection seismic data
DynamicRange: 144 dB (system), 110 dB (instantaneous, measured) at 2ms, 24dB.
Distortion: 0.0005% @ 2 ms, 1.75 to 208 Hz.
Bandwidth: 1.75 Hz to 20 kHz. Low corner frequency option available.
Common Mode Rejection: > -100 dB at <=100 Hz, 36 dB.
Crosstalk: -125 dB at 23.5 Hz, 24 dB, 2 ms.
Noise Floor: 0.2uV, RFI at 2 ms, 36 dB, 1.75 to 208 Hz.
Stacking Trigger Accuracy: 1/32 of sample interval.
Maximum Input Signal: 2.8 VPP.
Input Impedance: 20 kOhm, 0.02 uf
Geode Peripherals
Geophones
Geophones 14 Hz vertical (12 channels) Prep:$8 Daily: $4 Monthly: $95
Geophones 8 Hz horizontal (12 channels) Prep:$8 Daily: $4 Monthly: $95
Geophones 4.5 Hz vertical (12 channels) Prep:$25 Daily: $10 Monthly: $240
Spread Cables
10ft Spread Cables (12 channels) Prep:$20 Daily: $5 Monthly: $120
20ft Spread Cables (12 channels) Prep:$20 Daily: $6 Monthly: $145
Land Streamer Cable (24 channels) Prep:$120 Daily: $60 Monthly: $1,440

Ohmmapper

The Ohmmapper is a capacivitely-coupled resistivity meter that can collect data at a blazing rate compared to a traditional resistivity meter with stakes in the ground. Further, its less susceptible to noise, which means it operates in areas that other meters cannot. Finally, it can be used over a variety of terrains such as concrete, asphalt, ice, or other hard surfaces whereas the traditional meter requires the user to drill holes to insert electrode spikes into the ground.

Geometrics OhmMapper Towed Array.

Geometrics OhmMapper Towed Array.

Geometrics Ohmmapper Specifications:

Ohmmapper Specifications
Maximum Depth of Investigation Often less than 50 to 100 ft depending on soil resistivity.
Prep Fee $175
Rental Prices $175 a day or $4,200 a month
Estimated Shipping Dimensions Box 1) 28 x 22 x 18 inches
Box 2) 34 x 17 x 15 inches
Estimated Shipping Weight Box 1) 60 lbs
Box 2) 80 lbs
Power Source 24v battery for console. Eight 6v batteries for TX and RX.
Other notes:
Measured Quantities: Constant-current capacitively-coupled, dipole-dipole resistivity
Operating range: Less than 1 OhmMeters to greater than 100,000 OhmMeters
Cycle Rate: Signal sample and data logging rate at 2 times per second
Survey Types:
1. Continuous, constant-offset dipole-dipole resistivity. (Multi-line with constant transmitter-receiver spacing for plan-view mapping.)
2. Variable-offset, dipole-dipole resistivity. (Variable transmitter-receiver spacing for multiple passes on a single profile line to create a pseudosection.)
Ability to use in conjunction with GPS antenna

Sensors & Software geophysical equipment rental and sales:

Sensors and Software is a leader in the field of ground penetrating radar. In fact, their founder, Peter Annan, helped pioneer both ground penetrating radar and airborne electromagnetic technologies, making the company experts in their field. In the simplest terms, ground penetrating radar sends radio pulses into the ground that reflect or distort when they encounter materials or objects of different properties. The time it takes for a pulse to reach an object, bounce off it, and come back to instrument reflects how deep a target is if the speed of the pulse is a known. Ground penetrating radar systems are often used to image the subsurface surfaces such as soil, rock, groundwater, pavement, concrete, utilities, and ice.

Sensors & Software GPR units used to map bedrock that K. D. Jones Instruments rents:

Noggin Smartcart with 250 MHz antenna:

The Noggin Smartcart is a four-wheeled, foldable GPR cart system that can use a multitude of different antenna frequencies.  The foldable cart assembles in less than a minute. In addition, the survey menus that configure grid or line surveys are very user friendly. For shallow bedrock mapping, we offer the Noggin 250 MHz antenna. In favorable conditions, this antenna frequency can reach depths of 10 to 15 feet.

Noggin 250 Specifications:

Noggin 250 Specifications:
Maximum Depth of Investigation 20 feet
Prep Fee $175
Rental Prices $125 a day or $3,000 a month
Estimated Shipping Dimensions 46 x 24 x 19 inches
Estimated Shipping Weight 100lbs
Power Source 12v in Pelican Case
Other notes:
Center Frequency: 250 MHz
Shielding Front to Back
Acquisition Rate*: 100,000 samples/second
Stacks (N):Unlimited, DynaQ® when odometer triggering
Ability to use in conjunction with GPS antenna

PulseEKKO Pro Smartcart with 50, 100, or 200 MHZ antennas:

The PulseEKKO Pro Smartcart is a four wheeled, foldable GPR cart system. It takes a bit more time to physically set up than the Noggin system due to its bistatic antennas, but it is more versatile in application and its frequency selection. For bedrock mapping, we suggest the 50, 100, and 200 MHZ antennas, which can reach depths of 65 ft, 32 ft, and 16 ft in ideal soil conditions. With the introduction of the newly developed Ultra receiver (January 2019), one can reach depths of less than 25 ft with great certainty.

Sensors &amp; Software pulseEKKO GPR with Ultra Receiver from K. D. Jones Instruments geophysical equipment rental.

Sensors & Software pulseEKKO GPR with Ultra Receiver from K. D. Jones Instruments geophysical equipment rental.

PulseEKKO Pro Specifications:

PulseEKKO Pro Specifications:
Maximum Depth of Investigation 50MHz: 65 feet

100MHz: 33 feet

200MHz: 16 feet

Prep Fee $265
Rental Prices $175 a day or $4,200 a month
Estimated Shipping Dimensions Cart Box: 59 x 21 x 13 inches

DVL Box 25 x 25 x 19 inches

Estimated Shipping Weight 100 lbs and 80 lbs
Power Source 12v in pelican case
Other notes:
Center Frequency: 50, 100, or 200 MHz
Bistatic, unshielded antennas
Acquisition Rate*: 100,000 samples/second
Stacks (N):Unlimited, DynaQ® when odometer triggering
Ability to use in conjunction with GPS antenna

Hemisphere geophysical equipment rental and sales:

Hemisphere produces quality global positioning systems used in geophysical, agricultural, GIS, survey, marine, construction, and other industries. These GPS units are easy to use with bedrock mapping instruments. Users need to connect the GPS to an instrument (or data logger) via data cable, then connect the power to the GPS unit, wait for the GPS to lock-in a signal, and begin logging data. GPS made by Hemisphere units are commonly used with GPR, electromagnetic, and capacivitely-coupled resistivity meters.

Hemisphere instruments used with equipment that maps bedrock that K. D. Jones Instruments rents:

A100, A101, and A222 GPS receivers

Hemisphere A100, A101, and A222 GPS single-frequency receivers are rugged and easy to use. They mount to a GPS staff via 5/8” threaded bolt and connect to most instruments via a 9 pin serial adapter. After connecting to power, they acquire fixed quality data in 5-10 minutes, which can be seen as the GPS’s indicator light changes from red (no signal) to orange (signal, float quality) to green (signal, fixed signal.) The unit uses little power, and batteries typically last all day.  Accuracy is submeter.

Specifications:

Hemisphere Specifications
Prep Fee $35
Rental Prices A100 or A101: $35 a day or $840 a month.
Estimated Shipping Dimensions 22 x 15 x 12 inches
Estimated Shipping Weight 22 lbs
Power Source 12v battery
Other notes:
Connects via RS232 serial port
Positional Accuracy: 60cm 95% of time
Atlaslink Positional Accuracy: 30 to 50cm 95% of time

AtlasLink

The Hemisphere Atlaslink multi-frequency receiver is also rugged and easy to use. Like other Hemisphere antennas, it mounts to a 5/8” threaded bolt, transfers data via 9 pin serial, and uses little power. Unlike other receivers, it receives corrections from Atlas GNSS global correction service, meaning it retains 30-50cm accuracy 95% of the time.

Specifications:

AtlasLink Specifications
Prep Fee $35
Rental Prices Atlaslink: $58 or $1,392 a month
Estimated Shipping Dimensions 22 x 15 x 12 inches
Estimated Shipping Weight 22 lbs
Power Source 12v battery
Other notes:
Connects via RS232 serial port
Atlaslink Positional Accuracy: 30 to 50cm 95% of time

 

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