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In-hole Transient Electromagnetic Instrument

Product features

1. In light of the transient electromagnetic method, the resistivity distribution characteristics of the surrounding medium of the hole are obtained by receiving signals in the excitation hole of the roadway for the purpose of ascertaining the abnormal situation around and in the front of the hole. With this method, one hole provides multiple inputs. It integrates the functions of inclination surveying and depth sounding while drilling;

2. It is applied to hidden danger detection in mines, tunnels, water conservancy works, subways and other fields, and can also be used in the field of resource exploration;

3. As a new generation of intelligent geophysical prospecting equipment, it has Internet of Things access and cloud computing etc.

Product Parameters
Number of channels16、32、48、64、128、256 channels, etc. (expandable)Input Impedance>20MΩ
A/D conversion24 bitsPower supply square waveMulti-frequency positive square wave, with positive and negative square wave for option
Voltage measurement scope±10VConstant current time10ms、100ms、200ms、500ms、1s、2s、6s、10s
Emission voltage0V、24V、48V、72V、96V adjustableVoltage measurement accuracy0.5%(Full)
Maximum emission current2ACurrent measurement accuracy0.5%(Full)
Sampling interval1ms、2ms、5ms、10ms、20ms、50ms、100ms、200ms、500ms
Communication modeUSB,serial port, optional WI-FI interface
Built-in FPGACapable of completing a variety of digital signal processing functions
Working timeBuilt-in rechargeable battery, which supports continuous work for 8h after fully charged
Number of channels16、32、48、64、128、256 channels, etc. (expandable)Input Impedance32 KΩ
A/D conversion24 bitsNumber of sampling points1K、2K、4K、8K、16K
Sampling interval20/50/100/200/500/2000 μs (optional)Number of advanced sampling points32、64、128、256、512、1024、2048
Number of delayed sampling points32、64、128、256、512、1024、2048Trigger modeExternal trigger/signal edge trigger
Theoretical dynamic scope180 dBMaximum input signal±5Vrms
Preamplifier (fixed/floating point)1/8、1/4、1/2、1、2、4、8、16、32、64、128
Communication modeUSB, serial port, optional WI-FI interface
Built-in FPGACapable of completing a variety of digital signal processing functions
Working timeBuilt-in rechargeable battery, which supports continuous work for 8h after fully charged
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