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

Overhauser magnetometer-gradiometer MaxiMag

Main features:
  • Highest precision and sensitivity
  • Field magnetometer/gradiometer or base station
  • Built-in GNSS receiver and flashlight
  • Switch panel for right- and left-handed people
  • Lightest in the World
MaxiMag magnetometer
MaxiMag magnetometer MaxiMag gradiometer Multi sensor gradiometer SmartMag magnetometer External GNSS antenna CAN-Ethernet interface Non-magnetic cart RS-232 data logger CAN FD cable RS-232 cable
Price: $11,500
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MaxiMag – the World's most advanced and portable magnetometer/gradiometer based on the Overhauser effect. The instrument is designed to measure magnetic field with high sensitivity and absolute accuracy. MaxiMag can be used as a field magnetometer, two- or multi-sensor gradiometer, base station, or observatory magnetometer. MaxiMag console is fully compatible with SmartMag digital magnetometers and recognizes them as standard digital Overhauser sensors.

Perfect gradiometer for any task resolution
MaxiMag console allows you to connect up to 30 digital Overhauser sensors or SmartMag magnetometers via a wired CAN interface. This unique feature enables to build two- or multi-sensor gradiometers with the required measurement base.

Easy-to-use tablet console
We have equipped the console with a large, excellent daylight readable, heated display, a two-way switch panel, modern wired interfaces and even a flashlight. The control of measured values and their quality is provided in digital, graphical, and audible modes. Line planning, operator guidance, saving of coordinates and exact times of measurements are provided by built-in multi-system GNSS receiver. In some cases, external GNSS receiver is required - MaxiMag supports the standard NMEA-0183 protocol and can be connected to most navigation devices. Data download is available via USB, RS-232 or from the built-in industrial microSD card. We also made sure that all our parts and connectors were non-magnetic, which allowed to reduce the dimensions of the ready-to-go magnetometer set. Maneuvering with a magnetometer in forests and jungles has never been easier!

Magnetometer for magnetic observatories
High sensitivity, sampling rate, and accuracy (less than 0.1 nT) allow to use MaxiMag in magnetic observatories, but a more optimal solution to this problem is provided by the digital SmartMag. Both magnetometers support real-time data upload mode via USB, CAN FD or RS-232 connection. Optional CAN-Ethernet interface module can be connected directly to the network equipment. The digital CAN FD line can be up to several kilometers long. The device is supplied with the SmartManager software which has all the necessary functionality to work in the INTERMAGNET network of magnetic observatories.

Metrology - a guarantee of high accuracy
Every MaxiMag sensor is metrologically tested. We control the standard deviation of random error (noise), absolute accuracy and orientation error. All magnetometers are supplied with a certificate of calibration performed on a certified measure of magnetic induction. Metrological tests guarantee the accuracy and reliability of the measured data.

Reliability and warranty
Our R&D specialists have extensive experience in performing geophysical surveys. We are well aware that such equipment must be reliable, and the service must be fast and comfortable. We give 3 years warranty on all our magnetometers, and our technical support will promptly answer any of your questions. Our Overhauser sensors have the longest in the World lifecycle of more than 10 years. You can also take advantage of our trade-in program and replace your old instruments with the new MaxiMag with available discounts.

Important "little things"
We know that geophysical instruments should not have useless details, so we try to make our equipment as comfortable to use as possible. Here are some important details of MaxiMag:

  • The two-way keypad ensures the same ease of operation for both right- and left-handed people
  • The MaxiMag console has a built-in ultra-bright LED flashlight for safe navigation in the dark
  • The built-in multi-system GNSS receiver
  • MaxiMag is supplied with a high-capacity and lightweight Li-ion battery with an operating temperature range from -40 ÷ +85°C and an MSDS certificate of safety for any kind of transportation
  • Supplied Li-ion battery power is enough for several days of data acquisition on one charge
  • Advanced signal processing algorithms provide enhanced gradient tolerance and noise protection
  • All MaxiMag electronic modules are sealed and unaffected by rain and dust
  • Durable connectors and cables for high performance
  • Operating temperature from -40 to +60 °C
  • On request SDK API for Windows can be supplied allowing to upload data recorded in real-time
Operating modes
  • Single or continuous measurement mode including “walking” mode with a cycle of 0.2 s or longer
  • 3D or 2D surveys with navigation software and automatic entry of profile number, picket and time for each measurement
  • High sampling rate allows to use MaxiMag on vehicles such as carts, all-terrain-vehicles, boats etc.
  • Base station with the ability to record the results of measurements into non-volatile memory or upload them in real time to a PC, including for broadcasting over the Internet
  • Test mode without data saving with calculation of the average value and standard deviation
Application area
  • Archaeological studies
  • Engineering surveys
  • Pipeline mapping
  • UXO detection
  • Mineral exploration
  • Oil and gas exploration
  • Regional geological surveys
  • Magnetic observatory measurements
SmartManager software features
  • Magnetic field measurement control
  • Visualization of measured values
  • Saving daily data files
  • Recording of measurement results to backup data storage devices
  • Visualization of the calculated measurement sensitivity
Capabilities of the CAN-Ethernet interface module
  • Real-time acquisition and transmission of data via Ethernet to a PC or network
  • Data backup to industrial microSD
  • MaxiMag power supply
  • Backup power supply from external 12 V battery in case of mains power (100-240 VAC) failure
Delivery set
  • Digital Overhauser sensor with sensor cable
  • Console with built-in GNSS receiver
  • 12 V gel battery with charger
  • Backpack harness
  • Operation manual
  • USB cable
  • Transportation case
  • Additional digital Overhauser sensors
  • Digital Overhauser magnetometer SmartMag
  • Non-magnetic cart
  • External GNSS antenna
  • Li-ion rechargeable battery
  • CAN-Ethernet interface unit for connecting to router or PC, supplying 100-240 VAC power and backing up data to industrial microSD
  • CAN FD cable
  • RS-232 cable
  • RS-232 data logger


Overhauser magnetometer

Number of sensors

up to 30

Dynamic range

20 000 to 120 000 nT

Absolute accuracy

0.1 nT

Sensor sensitivity

0.021 nT/√Hz rms

0.012 nT/√Hz rms (on request)


0.001 nT

Gradient tolerance

30 000 nT/m

Sample rates

0.2, 0.33, 0.5, 1, 1.5, 2, 2.5, 3 s and longer with 1 s step

Sensors stability

> 10 years


built-in: USB, RS-232, CAN FD.

optional: Ethernet (CAN-Ethernet interface module)

Maximum communication cable length

up to 6 km (CAN FD), up to 100 m (RS-232)

GNSS receiver

built-in and optional external

GNSS antenna

built-in and optional external

GNSS signals

GPS L1C/A and L2C; GLONASS L1OF and L2OF; Galileo E1B/C and E5b; BeiDou B1I and B2I; QZSS L1C/A, L1S and L2C. SBAS: WAAS, EGNOS, MSAS, GAGAN, SDCM.


2 × CAN FD+12V / RS232+12V, USB, external GNSS antenna


240 × 128, LCD

Membrane switch panel

32 buttons

Internal memory capacity

up to 32 Gb (industrial microSD)


10 ÷ 16.8 V, Li-ion or lead battery

220 V / 50 Hz, optional CAN-Ethernet interface

Operating temperature

–40 to +60 °C

Li-ion battery

14.6 V, 4 A·h


LED, 300 lumens

Dimensions with connectors

950×125×72 mm – sensor

260×150×45 mm – console

Item weight

1.2 kg – console

1.3 kg – sensor

Weight of a set includes console, sensor, Li-ion battery, harness and sensor cable

3.8 kg – magnetometer

5.2 kg – gradiometer

9 Mb