Proton Memory MagnetometerGeotro Proton Magnetometer

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We are agent which representing geophysical Instruments proton magnetometer, located in Jakarta Timur. It’s an omni direction magnetometer

Geotron Model G5 Proton Magnetometer

Long term experience and customer feedback enabled the Geotron design team to produce a magnetometer
which offers specifications equal to any other proton precession instrument. Apart from the technical excellence,
however, the G5 is one of the simplest memory magnetometers to operate. Conceived, designed and
produced with increased operator productivity as our main goal, the G5 magnetometer incorporates the following
ergonomic design features:

The front panel incorporates an 80 character, 2 line alpha numeric liquid crystal display, easy to read even in
brilliant sunlight.
Switch-on and -off is by inserting the sensor or download cable in it’s socket.
This means that the instrument cannot easily be left on by accident and run the batteries down.

Operation of the magnetometer is via menus. There are no complicated set-up or other procedures to
remember. Nor are there any codes or abbreviations used to confuse the operator. The main menu structure is
as follows:

Read = 1, Tune = 2, Position = 3, Recall = 4, Dump = 5,
Erase = 6, Mode = 7, Set clock = 8, Stats = 9.

All menu choices are made via numeric entries. Where the operator is required to enter data, for example a line
number, the prompt message is clear and unambiguous. A standard keystroke sequence is used to enter all
data. To return to the main menu, a “MENU” key is provided.
The keyboard on the front panel is a 15-key membrane pad with tactile feedback, so that the operator is sure
whether or not a key has been pressed. The following keys are provided: Digits from zero to nine, minus,

At the start of every reading cycle, the G5 displays the battery level and the tuning level. This allows the operator
to monitor these critical factors continuously. When a low battery condition does occur, this fact is immediately
brought to the attention of the operator. No data will be lost as a result of battery replacement in the middle of a
For every reading taken, the signal strength and the change from the previous reading is displayed on the front
panel. This enables the operator to check the quality of the data obtained.

In manual mode, the operator has to make an explicit selection whether or not to store a reading. This prevents
the inadvertent recording of “noisy” or invalid data. Only once a reading has been accepted does the G5
increment or decrement the station number, ready for the next reading. Until such time, multiple readings may be
taken at the same station.

The G5 offers the option of automatic tuning to the signal received. Using this option enables the operator to
obtain maximum signal strength despite sharp changes in magnetic gradient. When the instrument is used in
auto mode, the automatic tuning option ensures that data quality remains high.
In auto mode, readings will only commence at a time which is an integral multiple of the reading interval chosen.
The data is stored automatically, obviating the need for an operator to be in attendance when using the G5 as a
base station during a survey.


  • By selecting the “Stats” option, the operator may at any time see the following: The date, time, line number, station number and inter-station spacing, mode (manual/auto), auto time interval, current tuning level, Julian day, number of stored readings and the total memory capacity.
  • For every reading taken in manual mode, the operator may store an “Electronic Notepad Index” value. This facility allows the operator to record geological, environmental or cultural features without the need to carry a notebook or clipboard.
  • For every reading, the G5 stores the reading number, line and station numbers, date and time, reading, signal strength and “Notepad Index” value.
  • The data storage algorithm used allows for a minimum of 7500 readings to be stored. Up to 14000 readings can be stored depending upon the relative changes in stored values.
  • The data stored in the G5’s memory may be downloaded via an RS-232 port to a microcomputer. Geotron’s proprietary software (provided free of charge with every instrument sold) is used to control the download and to arrange the data in either “GEOSOFT” or standard format on the computer’s disk.
  • After downloading of data, the memory has to be explicitly erased by the operator. This ensures that data cannot be lost if the computer develops a problem during downloading.


The GEOTRON model G5 proton magnetometer is an advanced portable instrument, both technically and ergonomically. It is well suited to its principle applications in:

  • Mineral and Petroleum exploration
  • Groundwater and geohydrological surveys
  • Geological mapping
  • Engineering geology work
  • Ground follow-up of airborne surveys
  • Mine planning and control
  • Archeological searches
  • Educational and Research institutes
  • Diurnal drift monitoring
  • Ecological Studies

The usefulness and application of the G5 is enhanced by the following technical design features:

  • 0,1 gamma sensitivity and accuracy for scientific work
  • The total field strength is displayed in nanoteslas (gammas)
  • Light, compact, reliable and rugged design
  • Low power consumption
  • Short time required to take a measurement
  • Absolute calibration, cannot drift
  • All in all, the GEOTRON G5 is a rugged instrument capable of giving you reliable and repeatable data at a high acquisition rate for many years to come.


Range                                                    20 to 100 microtesla

Resolution                                             0,1 nanotesla

Accuracy                                               Better than 1 nanotesla

Sensor type                                          Dual coil, omnidirectional above 10° inclination

Tolerable external gradient               4000 nanotesla per meter

Cycle time                                           Manual mode: 2 sec minimum

Auto mode                                          : 4 to 999 Sec, 1 to 999 mm

Tuning                                                   Automatic or manual

Display                                                  80 character, 2-line, alphanumeric, liquid crystal

Temperature range                             -10 0C to 50 0C

Power requirements                           18 Volts DC

Power supply                                       Lead-acid rechargeable batteries, 6 volt, 3 Ah

Charger                                                 Constant current – constant voltage system with 220/110V

AC and 10-15V DC inputs.

Physical – Instrument                          Height : 220 mm

Width : 230 mm

Length : 110 mm

Mass: 2.5 kg

Physical – Sensor                               Diam    : 75 mm

Length : 160 mm

Mass    : 1.2 kg

Physical – Six sensor poles

Diam   : 25 mm with 0.625 inch WW thread

Length: 400 mm each

Mass   : 0.113 kg each

Physical – Charger                              Height : 160 mm

Width  : 80 mm

Length: 80 mm

Mass                                                      : 0.75 kg

Maximum memory capacity            14 000 readings depending upon field conditions

Digital data output                               Via RS-232 (serial) port at 9600 baud

Finishes Instrument:                           Anodized and painted aluminum

Sensor poles:                                       Anodized aluminum

Sensor:                                                  PVC case

In/Output connection                           Plug-in switch-on type

Harness                                                 Canvas with front pouch for instrument housing, backpouch for sensor

Standard Package                              Sensor, sensor poles, instrument, harness, download cable, operator’s                                                                                     manual and CD with PC software in a foam-lined rigid pelican case

Warranty                                                One year from delivery date