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Numis Lite

Numis Lite
Numis Lite

The Numis lite device is a Magnetic Resonance Sounding (MRS) system for the direct detection of shallow groundwater down to 50 m of depth.

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).

Software

Download
pdf

Prodiviner

Acquisition for Numis Plus / Lite

Characteristics

Transmitter

Voltage: 

0 - 2000 Vpp

Current: 

0 - 150A

Pulse moment:

100 to 6000 A.ms

Battery: 

two external 12V

Receiver

sampling frequency:

4 times the Larmor frequency

Channel: 

1 channel

noise level:

Lower than 10 nV/√Hz

Dimensions

( L x W x H)

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

Documentation

pdf
Datasheet
pdf
Checklist
Magnetic resonance sounding method (principle, equipment, case histories)
pdf

IRIS Instruments
1 Av. Buffon 45100 Orléans France
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