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GT- Emix magnetotelluric instrument

EMIX-410 is an earth's electromagnetic field data acquisition and observation system designed specifically for measuring the earth's electric and magnetic fields. It is mainly composed of the host, three-component high-precision vector fluxgate, four-component electric channel acquisition box, GPS, instrument control box, and lightning protection device six parts.

Classification:

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Detailed description

Key features:

The EMIX-410 host is light, firm, impact resistant, suitable for field flow construction and long-term observation of fixed stations; the magnetic sensor has the characteristics of extremely high stability, small drift and high precision, suitable for long-term detection; ultra-high input impedance and ultra-low drift technology to ensure high-quality electric field signals. EMIX-410 collected data is stored on an external high-performance industrial board SD card, with a capacity of up to 32GB to ensure long-term data collection. The GPS receiver is used for data sampling synchronization and location coordinates; the ground wire (lightning protection device) can ensure the safety of the instrument and data, and at the same time perceive the temperature of the external sensor for temperature drift correction. The EMIX-410 is a geophysical field data acquisition system specially designed for various terrain conditions, which can be operated by single machine and synchronous operation of multi-station distributed system.

Product use:

◆Observation parameters: geoelectric field observation, earth magnetic field observation, magnetotelluric field observation

◆ Research objects: deep crustal structure research, active fault investigation, deep exploration of mineral resources

Performance parameters:

Model		GT- Emix magnetotelluric instrument
Host	Physical Dimensions	230 × 200 × 110
	Weight	4.2 kg
	Working temperature	-30~75 ℃
	Supply voltage	4.5V~9V
	Temperature Sensor Sensitivity	0.1℃
	TF card capacity （FAT-16，FAT-32）	1GB……32GB
	Host Bandwidth	~10KHz
magnetic field sensor	Magnetic field measurement range	±75000 nT
	three-component magnetic field resolution	15 pT
	Sensitivity	0.13 V/μT
	zero drift	< ±5 nT/yr
	temperature drift	≤ ± 0.3 nt/k
	Noise level	<10pT/√Hz
	Cable length	10 m
	Sample Rate (Default)	20 Hz
	Error range	0.097 μV
	Digital-to-analog conversion	32 bit
electric field sensor	Electric field measurement range	±0.1 mV；±5000mV
	Resolution of Electric Field Change Recorded in TF Card	0.01 mV/km
	Measure bandwidth	DC-2KHz
	Error range	0.095 μV
	Digital-to-analog conversion	32 bit

(Note: the parameters are for reference only, customized products can be adjusted according to customer needs)

Configuration list:

Serial Number	Name	Quantity	Unit	Description
1	System Host	1	Taiwan
2	fluxgate sensor	1	Taiwan	Standard 10m connection cable
3	Electric field acquisition channel unit	1	Sleeve
4	Host control box	1	One	Standard cable length 1m
5	GPS antenna	1	Root
6	TF storage unit	1	One	32GB
7	Power connection cable	1	Root
8	Grounding unit	1	One
9	Electrical signal connector	8	Right.	8 pairs of butt plugs; 8 connecting plugs
10	Shielding electrical signal lines	8	Root	Standard length 50m
11	High stability non-polarized electrode	8	One
12	User Manual	1	Dhis	Electronic version

(Note: the parameters are for reference only, customized products can be adjusted according to customer needs)

Engineering case:

Case one< Tunnel investigation >

Completed Unit:A company in Tianjin

Project purpose:Selection and Selection of Railway Tunnel Scheme (Crossing Qinling Tunnel)

Using the instrument:EMIX-410

Project results:The total length of the tunnel is 13.3Km. The geophysical exploration results have successfully controlled the development and spatial distribution of 15 fracture zones, delineated poor lithological integrity or fracture zones, rich water zones and Class I and II high-risk zones, and focused on the interpretation of the integrity of the surrounding rock within the height range of the tunnel.

Case II< Tunnel investigation >

Completed Unit:A company in Tianjin

Project purpose:Tunnel investigation

Using the instrument:EMIX-410

Project results:The total length of the tunnel is 10.675Km. Geophysical exploration results have successfully controlled the development and spatial distribution of 4 fracture zones, delineated poor lithological integrity or fracture zones and Class I high-risk zones (31), and focused on interpreting the classification of surrounding rocks within the height range of the tunnel.

Case three< Tunnel investigation >

Completed Unit:A company in Tianjin

Project purpose:Tunnel investigation

Using the instrument:EMIX-410

Project results:The total length of the tunnel is 10.425Km, and the geophysical exploration results have successfully controlled the development and spatial distribution of three fracture zones, delineated poor lithological integrity or fracture zones, Class I high-risk zones (4) and Class II high-risk zones (3), and focused on interpreting the integrity of surrounding rocks within the height range of the tunnel.

Case four< Pumped storage survey >

Completed Unit:A company in Tianjin

Project purpose:Reservoir water conveyance tunnel line survey

Using the instrument:EMIX-410

Project results:The total length of the tunnel is 3.63Km, and the interpretation depth is 1000 m. The geophysical exploration results successfully controlled the development and spatial distribution of the four fracture zones, and delineated the distribution range of granite, tuff, basalt and argillaceous siltstone.

Key words:

GT- Emix magnetotelluric instrument