Equipment & Software for Geophysical Surveys: Design, Manufacture, Support, Supply

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Overhauser magnetometer MiniMag

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Item ID: MiniMag


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Main features:
  • Lightest and the most portable in the World
  • Wide range: 20 000 ÷ 110 000 nT
  • High sensitivity: 0.015 nT
  • Built-in GLONASS / GPS
  • Li-ion battery included

Latest-generation magnetometers of the well-known MiniMag series are the most advanced high-precision instruments intended for the Earth’s total field measurements. MiniMag is the lightest Overhauser magnetometer in the World, its weight is only 3.3 kg with power supply.

The magnetometer could be deployed as both rover hand-held magnetometer and base station (autonomous or remote). In the remote mode data can be either stored in the built-in memory or transferred to a remote PC in real-time. Outstanding absolute accuracy (less than ±0.2 nT) and real-time data transfer allow MiniMag to be used in magnetic observatories.

Integrated GPS/GLONASS receiver enables automatic coordinate gridding of measurement stations and time synchronization with the base station making convenient the survey implementation as well as data processing. Graphic display along with built-in beeper makes the system very easy to use for the real-time UXO and utility detection.

Each particular magnetometer has its own Certificate issued by authorized organization based on the testing in the certified magnetic induction measure.

Distinctive features of the new generation of MiniMag:
  • Extended operating range: from 20 000 to 110 000 nT
  • Real-time data transfer to a remote PC
  • Increased absolute accuracy
  • Improved gradient tolerance and noise reduction
  • New rugged and waterproof construction of the console and sensor cases
  • New safe Li-ion battery that extends the operation temperature range (-40 ÷ +85 °C)
  • Built-in GLONASS/GPS receiver
  • Connection to PC via USB or RS-232 (optional)
  • Additional built-in memory with the software for data downloading, processing and visualization
  • Portable folding sensor rode (available as an option) — comfortable for air travels (fits general carry-on limits)
  • Handy and rugged transportation case
  • New heavy-duty cables and reinforced connectors
  • New ergonomic backpack for comfortable operation
  • MS Windows based SDK API − intended for real-time data transfer (available on request)
MiniMag features:
  • Automatic change of line and station numbers as well as their coordinate gridding
  • Precise measurements in the walking mode with 0.5 s rate
  • Stand-alone or remote base station modes either with data storage in built-in memory or real-time data transfer to a PC
  • Real-time data transfer
  • Both text and graphic data presentation via built-in display
  • Test mode with RMS and medium value estimation (without data storage)
  • Data export to ASCII text file
MiniMag areas of application:
  • Mineral exploration
  • Oil and gas exploration
  • Environmental and engineering studies
  • Archaeological surveys
  • UXO detection
  • Continuous monitoring in magnetic observatories
Package contents:
  • MiniMag magnetometer
  • Console
  • Set of cables
  • Remote start module
  • Li-ion battery with power cable
  • Charger
  • External power supply (for lead battery);
  • Backpack harness;
  • Rugged shipping / storage container;
  • Data storage software
  • Calibration certificate issued by authorized organization
  • Operation manual

We recommend to consider MagGPS software for fast and convenient data parsing, processing, visualization and quality control. It is mainly intended for the preliminary data processing: taking into account magnetic field variations, data filtering and analysis, coordinate gridding, plotting of magnetometry maps (total field, anomalies, gradient). The software allows quick processing of large amounts of data, obtained with various equipment using different observation techniques.

Magnetometry survey forward modelling and data inversion may be successfully carried out with advanced ZondGM2d and ZondGM3d software packages.

Range, nT 20 000 ÷ 110 000
Sensitivity, nT 0.015
Resolution, nT 0.001
Absolute accuracy, nT 0.2
Gradient tolerance, nT/m up to 10 000
Max sample rate, Hz 2
Memory capacity, measurements 1 000 000 (in base magnetic station mode), 250 000 (with coordinate referencing)
Communication interface with PC USB
Power 10 ÷ 16.8 V, Li-ion or Pb battery
Operating temperature, ˚С -20 ÷ 50
Weight, kg 3.3
Operation-manual_MiniMag.pdf 4.28 mb 15 June 2020, 16:00