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Home Sensors 3-Component Precision Flux-Gate Magnetometer LEMI-018

3-Component Precision Flux-Gate Magnetometer LEMI-018

Description

LEMI-018 vector magnetometer for the precise measurement of Earth's magnetic field and its variations at laboratory and land conditions as well as in geomagnetic observatory is produced on the base of flux-gate sensor, all three components of which are implemented in the same body.

It consists of two units - sensor unit with adjustable or suspended support and electronic unit both connected by long cable. The electronic unit allows automated operation - acquisition, processing and storage of data about magnetic field and its variations and their transmission at request to the external user via RS232 interface or by FLASH card replacing. Built-in GPS receiver provides satellite synchronization of the internal clock and the coordinates of magnetometer location.

It allows organizing the synchronous operation of a set of the magnetometers installed at the studied area. The considerable volume of internal non-volatile memory for data recording and small power consumption permits to use the magnetometer for long-term autonomous measure-ments in land conditions. Other options, e.g., tilt compensated sensor version, for observatory and laboratory use, hermetic version etc. exist too.

Technical specification

  • Measuring ranges of total magnetic field at the display: –––––––––––––––– ± 68 000 nT
  • Resolution along each component at the display,
    digital output and FLASH card data ––––––––––––––––––––––––––––––––– 0.033 nT
  • Measured range at analog output
    without additional compensation ––––––––––––––––––––––––––––––––––– ±1000nT
  • Transformation factor of analog output –––––––––––––––––––––––––––––– 2.4 mV/nT
  • Noise level at (0.01 – 1) Hz frequency band –––––––––––––––––––––––––– < 10 pT rms
  • Temperature drift ––––––––––––––––––––––––––––––––––––––––––––––– < 0.1 nT/°C
  • Components orthogonality error ––––––––––––––––––––––––––––––––––– < 30 min of arc
  • Automated offset compensation band along each component ––––––––––– ±68 000 nT
  • Time of samples averaging at magnetic field
    values registration into FLASH memory ––––––––––––––––––––––––––––– 1…255 s
  • Volume of internal memory –––––––––––––––––––––––––––––––––––––– 64 MB – 4 GB Flash card
  • Operating temperature range ––––––––––––––––––––––––––––––––––––– minus 10 to +60° C
  • Power supply, battery ––––––––––––––––––––––––––––––––––––––––––– 12 V
  • Power consumption ––––––––––––––––––––––––––––––––––––––––––––– < 0.6 W
  • Weight: sensor with support –––––––––––––––––––––––––––––––––––––– 1.2 kg
  • electronic unit ––––––––––––––––––––––––––––––––––––––––––––––––– 1.8 kg
  • Length of connecting cable, –––––––––––––––––––––––––––––––––––––– 5 m

Innovative Aspect and Main Advantages

The developed magnetometer has numerous know-hows implemented and allows to reach minimal possible sensitivity threshold in comparison with other known competitive versions on the market. Other major advantage is that simultaneously lowest possible consumed power of the magnetometer is provided what makes these devices indispensable for autonomous systems. The magnetometer and sensor have waterproof housings and can operate in wide temperature range autonomously up to 6 months. Serious advantage is also very competitive price – no more than 70% of regular market price for competitive devices.

Areas of Application

LEMI-018 can be used for magnetic geophysical research in fundamental branch of science and for deposits exploration using the sounding of Earth’s crust in land conditions and in observatories as basic magnetometer as well as for mag-netic repeat stations survey.


Fig. 1 Magnetometer LEMI-018.


Fig. 2 Main program window of LEMI-018.exe

Stage of Development

LEMI-018 is already on the market. LC ISR produces them for individual orders in the amount of 10-50 pieces per year.

Contact Details

Valery Korepanov
Organization: Lviv Center of Institute of Space Research NASU-NSAU
Address: 5A, Naukova str. Lviv-060, 79000, Ukraine
(38-0322) 639163
This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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