The Geonics EM31-MK2 uses an electromagnetic inductive technique to allow measurement in most geologic conditions including those of high surface resistivity such as sand, gravel, and asphalt. The effective depth of exploration is 6 meters, making the EM31 MK2 ideal for geotechnical and environmental site characterization. Advantages of employing this instrument over other conventional resistivity methods include the speed at which surveys can be performed, its precision in identifying small changes in conductivity, and its ability to continuously collect data while traversing the survey area.

The instrument rental includes the option of either the Mesa3 or the Archer2 data logger. Available accessories include the Juniper Systems Geode external sub-meter GPS.

applications:
– groundwater pollution and saline intrusion mapping
– shallow orebody detection
– buried debris detection
– buried foundation and utility mapping

rental rates (all prices in CAD):
$140 per day plus a $200 prep fee. Weekly and monthly rates also available. 

Measured Quantities:
1. Apparent conductivity in millisiemens per metre (mS/m)
2. In-phase ratio of the secondary to primary magnetic field in parts per thousand (ppt)

Intercoil Spacing: 3.66 metres

Operating Frequency: 9.8 kHz

Power Supply: 8 disposable alkeline “C” cells (approximately 20 hours continuous)

Measuring Range:
Conductivity: 10, 100, 1000 mS/m
In-phase: +/- 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

Data Output: RS-232 serial port, Bluetooth

Dimensions:
Boom: 4m extended, 1.4m stored
Case: 145 x 38 x 23 cm

Weights:
Instrument: 12.4 kg
Shipping: 28 kg