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CMD Explorer
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CMD Explorer

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Description

GF Instrument’s CMD Explorer electromagnetic conductivity meter is designed for survey depth ranges from 1.1 to 6.7 m. The system uses a contactless method allowing fast measurements of conductivity and inphase under all field conditions (including very dry and icy ground). The Explorer probe is equipped with 3 receivers with excellent temperature stability. This way makes for high resolution depth graded mapping as well as imaging of sections possible and useful for wide range of walking and moving applications.

 

CMD Explorer

…with simultaneous 6.7 m, 4.2 m, 2.2 m full depth ranges, designed for investigation of layered structures in the frame of geological, geotechnical, prospecting and other tasks. Rich current graphical output (with in-situ inversion)and support of consequent data processing (mapping, sections and inversion) make Explorer ideal for fast and complex EM survey.

CMD Explorer: three-depth probe
…with depth ranges 2.2 / 1.1 m, 4.2 / 2.1 m, 6.7 / 3.3 m
for extra wide range of applications with evaluation of vertical and horizontal conductivity changes.

Additional information

Product type

Electromagnetics

Features

  • Multi-depth profiling and mapping (1.1 – 6.7 m)
  • Standard or custom-made probes (1, 3 or 6 receivers)
  • Fast sampling (up to 10 Hz), high temperature stability
  • One control unit for all probes (B/W or colour display)
  • Simple operation, optional smartphone app
  • Manual and continuous measuring modes with GPS
  • Two Bluetooth channels (for probe and external GPS)
  • Real-time clock, map preview of area coverage
  • Data download via USB or flash disk
  • Rechargeable Li-Ion battery lasts for 2-3 working days
  • Lightweight and rugged design

SPECS

ProbeEffective High/Low Depth RangeDipole Center DistanceWorking Weight
Explorer2.2 / 1.1 m
4.2 / 2.1 m
6.7 / 3.3 m		1.48 m
2.82 m
4.49 m		8.0 kg
Probes:
  • Measured quantities and ranges:
    • Apparent conductivity: 1000 mS/m, resolution 0.1 mS/m.
    • Inphase ratio: ± 80 ppt, resolution 10 ppm
    • Measurement accuracy: ± 4% at 50 mS/m.
    • Temperature stability: better than 0.1 mS/m /°C at slow temp. changes.
    • Maximum sampling rate: 10 Hz.
    • Full and half depth range (vertical and horizontal orientation of dipoles).
    • Power supply: rechargeable Li-Ion battery lasts 2-3 working days (except. CMD-DUO transmitter).
    • Operating temperature: -10°C to +50°C.

 

Control Unit:
  • Connection with probe is provided by cable or Bluetooth unit.
  • Five modes of measurements:
    • Manual measurement – the user starts measurement at each point by pressing the key or by probe button. The point position is updated automatically in the preset grid or can be entered directly. Each point can be re-measured or skipped and completed with a comment.
    • Continuous measurement – data are measured and saved continuously in chosen measuring period. The positions on the profile are determined by length marks with consequent recalculation of positions of individual readings.
    • GPS Manual measurement – the user starts measurement at each point by pressing the key or by probe button. The position is determined by GPS receiver.
    • GPS Continuous measurement – data are measured and saved continuously in chosen measuring period. The position is determined by GPS receiver.
    • Search mode – data are measured continuously but are not saved.
  • Map preview of measured area (up to 15000 positions).
  • In-situ 1D inversion (two-layered model).
  • Two integrated Bluetooth channels.
  • Detachable GPS receiver (UTM/UPS recalculation possible).
  • USB data transfer or direct saving on USB flash disk.
  • Factory and user calibrations (stored in the probe).
  • Measurement time: 0.1 – 20 s.
  • 128 MB data flash memory:
    • max. 64 files.
    • max. 4.8 millions measured points.
  • Graphical B/W or colour display with backlight.
  • Real-time clock.
  • Power supply:
    • Rechargeable Li-Ion battery.
    • Supplementary 6 AA batteries (single-use or rechargeable NiCd or NiMh).
    • 12 V car socket.
  • Operating temperature: -10 °C to +50 °C.
  • Dimensions: 200 x 50 x 110 mm.
  • Weight: 0.65 kg (with Li-Ion battery).

Accessories

Standard Control Unit Accessories:
  • AC-adapter 100-240 V AC (50-60 Hz)
  • Cable for 12 V car socket supply
  • Supplementary 6 AA battery holder
  • Carrying belt
    (CMD-Mini Explorer, CMD Mini Explorer 6L, CMD-DUO, CMD-1, CMD-Tiny)
  • Cable for data download to PC and flash disk
  • CD with software
  • Operation manual
Standard Probe Accessories:
    • Transport aluminum case (dimensions and shipping weight):
  • CMD-Tiny, CMD-1, CMD-2
117 x 14 x 36 cm13.9, 15.2, 16.4 kg
  • CMD-4
146 x 14 x 45 cm23.5 kg
  • CMD-4/6
147 x 22 x 46 cm28.4 kg
  • CMD-DUO
  72 x 20 x 93 cm32.7 kg
  • CMD-MiniExplorer
137 x 14 x 137 cm17.0 kg
  • CMD-MiniExplorer 6L
172 x 14 x 37 cm20.0 kg
  • CMD-Explorer
134 x 25 x 36 cm25.5 kg
  • Holder for control unit, carrying belt and harness (CMD-Explorer, CMD-4/6, CMD-4, CMD-2)
  • Probe holder with Bluetooth unit, AC adapter 100-240 V (50-60 Hz) and supplementary 6 AA battery holder
    (CMD-Mini Explorer, CMD Mini Explorer 6L, CMD-1, CMD-Tiny)
  • Probe connection cable
Optional Accessories:
  • Bluetooth adapter for wireless communication with probe
  • Husqvarna harness (adapted for front and side carrying)
  • Inversion and mapping SW (IX1D, Res2DInv/Res3DInv, Surfer)

Resources

 

 

 

 

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