LEMI-417

Product type:
Long-period magnetotelluric station

Product description:
High resolution and accuracy
3 electric + 3 magnetic channels
Very low temporal and thermal drift
Low power consumption
512 MB – 2 GB internal memory
Satellite synchronization
4-lines digital display
Analog and RS – 232 outputs
Magnetic sensor with leveling facilities
Waterproof plastic case

Application description:
LEMI-417 digital six-component MTS (three magnetic + three electric channels) is intended for the measurement of natural magnetic and electric field components and their variations in laboratory and field conditions. Its major advantages are very low temporal drift and high accuracy of measurements, what makes it especially efficient for deep sounding application. The magnetometer is produced on the base of flux-gate sensor, all three components of which are implemented in the same thermostable housing. The electrometer has three channels with high input resistance and offset compensation, which can operate with any type of measuring electrodes. The electronic unit allows acquisition, processing and storage of data about magnetic and electric fields variations in internal memory and their transmission to the computer via RS-232 interface. Built-in GPS receiver provides satellite synchronization of the internal clock and the coordinates of the MTS location. MTS operation algorithm allows organizing both autonomous and synchronous operation of a set of the MTS installed at the studied area. Low magnetism of all components allows the magnetic sensor operating conveniently close to the electronic unit. We are flexible to adopt every parameter to your needs.

Highlights:
Low noise

Product image:

Specifications:

  • Magnetic variations measuring ranges along each component | ( ± 65 000 nT)
  • Resolution | (10 pT)
  • Noise level at analog output at 1 Hz | (< 7 pT)
  • Long-term zero drift | ( < ± 5 nT/year)
  • Temperature drift | (< 0.2 nT/°C)
  • Transformation factor linearity error | (< 0.01%)
  • Components orthogonality error | (< 30 min of arc)
  • Electric voltage total measurement range | ( ±250 mV)
  • Resolution | (10 nV)
  • Input resistance | (10 GOhm)
  • Time of samples averaging | (1, 2, 5, 10, 60 s)
  • Internal FLASH-memory volume | ( 512 MB – 2 GB)
  • Operating temperature range | (- 40 to +50 °C)
  • Power supply source | (built-in battery 12 V)
  • Power consumption | ( < 0.9 W)
  • Weight of electronic unit with magnetic sensor | (2.7 kg)
  • Length of connecting cable betwn magnetic sensor & electronic unit up to | (10m)

Additional Information:

LEMI-417_Datasheet.pdf