Numis Lite - Magnetic Resonance Sounding System (MRS)

This compact MRS equipment features:

• a converter/tuning unit powered by two 12 V batteries,
• a transmitter-receiver unit for pulse generation and signal measurement,
• a wire loop used as a transmitting and a receiving coil,
• a PC computer for the control of the whole system, and for data processing and interpretation

The MRS method is the only non-invasive method which directly studies groundwater reservoirs from surface measurements:
A pulse of current, at a given frequency is transmitted into a loop. The protons of the groundwater are excited. The signal produced during their return to equilibrium is measured with the same loop. To realize a sounding, different pulse moments (A.ms) are injected in the loop, all corresponding to different investigation depths.

This measure gives access to the soil water content (%) and is related to the mean pore size (permeability).

Transmitter 
Voltage: 0 - 2000 Vpp
Current: 0-150A
Pulse moment: 100to6000A.ms
Battery: two external 12V

Receiver 
sampling frequency: 4 times the Larmor frequency
Channel: 1 channel
noise level: Lower than 10nV/VHz

Dimensions 
(LxWxH) DC/DC Converter: 40 cm x 30 cm x 33 cm Tx/Rx main unit: 43 cm x 30 cm x 30 cm
weight: 2x20Kg
Operating Temp.:  -20 to +70°C