About T&S Geophysical

T&S Technology Development Co., Ltd has a long time of operation with extensive experience in many fields, especially in the field of Geophysical survey: Building foundation survey, Hydroelectricity, Underground water exploration, and Mineral exploration... In addition, there are many other fields such as Geological Survey, Geodesy, and Hydrology.

About us
T&S Geophysical

About T&S Geophysical

T&S Geophysics full name is T&S Technology Development Co., Ltd., the company was established under the Operation License issued by the Department of Planning and Investment of Bac Ninh province on October 25, 2004.

Enterprise code number 21.02.0735 issued by the Department of Planning and Investment of Bac Ninh province on October 25, 2004.

Certificate of competency in construction activities No. SXD-00005594 Grade 3 in the field of Geological Survey, Topography, Consulting and Supervision of works issued by Hanoi Department of Construction on March 23, 2023.

T&S has a team of skilled engineers and workers who are formally trained in universities and colleges, always supplemented with capacity and professional knowledge through each project, with a strong work ethic and high efficiency.

The company regularly maintains training to improve the professional qualifications and skills of the staff.

With the strength of the ability to research and apply technology, the company has equipped with highly specialized machinery and equipment to meet the most stringent requirements.

The company has a cooperative relationship with many units, many colleagues operating in the fields of research, education, and training to continuously update and apply new technologies in their fields of activity.

With equipment, experience, professional qualifications and self-improvement spirit of the staff, T&S provides customers with the fastest, most accurate and perfect survey services.


Areas of activity and services provided

At T&S Technology Development Co., Ltd we provide and consult services in geophysics and other fields.

  • Consulting, surveying: Geophysics, Geodesy, Geology, Engineering geology, Hydrogeology.
  • Research on New Materials Technology in Construction and Industry.
  • Producing and trading pulp & paper.
  • Construction of power lines and substations up to 35Kv.
  • Consulting and supervision of Irrigation, Agriculture, Transport infrastructure projects.
  • Advertising services, Interior decoration - Exterior, Graphic design.
Business registration certificate T&S Technology Development Company
Business registration certificate T&S Technology Development Company

Some projects done

T&S Technology Development Co., Ltd has a long time of operation with extensive experience in many fields, especially in the field of Geophysical survey: Building foundation survey, Hydroelectricity, Underground water exploration, Mineral exploration... In addition, there are many other fields such as: Geological Survey, Geodesy, Hydrology.

  • Seismic survey of Ching fong cement factory (Thuy Nguyen district) - Hai Phong)
  • Geophysical survey of Thai An Hydroelectricity (Quan Ba district - Ha Giang)
  • Xekaman Hydroelectricity Seismic Survey - 3 Se Kon Provinces - DPR Laos)
  • Geophysical Survey of Huoi Lam Phan - Thuong Hydropower Plant (Muong Tha) Teeng, Se Kon Province - Lao PDR)
  • Geophysical survey for iron ore exploration (Phu Nhuon, Xieng province) Around - Laos)
  • Geophysical Survey: Dak My - 2 Hydroelectricity (Phuoc Son district - Quang Nam)
  • Geophysical Survey of Nam Xay Noi Hydropower Plant - 2 (Van Ban district - Lao Cai)
  • 2D Electrical Depth Survey: Groundwater Exploration in Islands: Thanh Lan, Co To, Quan Lan, Ngoc Vung belong to COTO district, Ha Long Bay, Quang Ninh
  • Geophysical Survey Underground water exploration in Pha Long region (district) Muong Khuong - Lao Cai)
  • Geophysical Survey of Sap Viet Hydroelectricity (Yen Chau district - Son La)
  • Geophysical Survey of Salt - Gypsum Mine, Xavanakhet Province - Laos)
  • Geophysical Survey of Dak My 2 Hydropower Plant (Phuoc Son District - Quang Ninh Province) Male)
  • Geophysical Survey: Dak Rinh Hydropower Plant (Son Tay District - Quang Ninh Province) Ngai)
  • Geophysical Survey of Huoy Lam Phan Ha Hydropower Plant (Laos PDR)
  • Geophysical Survey of Xe Nam Noi Hydropower Plant (Lao PDR)
  • Geophysical Survey FORMOSA Vung Ang Steel Plant (District) Ky Anh - Ha Tinh)
  • Geophysical Survey of Nam Kong Hydroelectricity (Laos PDR)
  • Georada method survey of 21 weak tunnels of Hanoi railway line - Ho Chi Minh City
  • Geophysical Survey: Karsto Cave, Ngan Son Railway Bridge, Khe Tinh (Bo Trach and Tuyen Hoa, Quang Binh)
  • Shallow Sea Reflective Seismic Survey, Borehole Seismology: Factory Vung Ro oil refinery - Phu Yen
  • Seismic survey of borehole and resistivity measurement of Thermal plant Duyen Hai 3 Palace - Tra Vinh
  • Seismic survey of borehole and resistivity measurement of Thermal plant Vinh Tan 1 and 4 power station ( Huyen Tuy Phong, Binh Thuan province)
  • Seismic survey of borehole and resistivity measurement of Thermal plant Thai Binh 1, 2 electricity, Thai Binh province
  • Measurement of Carota borehole in Kaleum coal mine, SE KON province, LAO
  • Survey of parallel seismic method to determine pile depth, concrete foundations of buildings on the Metro Line from Kim Ma - Hanoi station phase 1 and phase 2
  • Survey of refractive seismic, transverse seismic of boreholes, thermal measurement - resistivity of Nghi Son 2 thermal power plant, Thanh Hoa
  • Refraction seismic survey Phuoc Tuong Tunnel - Phu Gia (Town) Lang Co - Thua Thien - Hue province)
  • Refraction seismic survey of Mui Chau Tunnel (Range of La Son - Tuy Loan, Da Nang)
  • Refraction seismic survey of Cu Mong Tunnel (Tunnel construction investment project) road through Ca Pass (Binh Dinh - Phu Yen section)
  • 2D resistive imaging depth survey: The landslide section of the Lower Expressway Long - Van Don: Point Km 26 and Km 27+800
  • Refraction seismic survey of Tam Diep Tunnel and Thung Thi Tunnel in North-South Expressway
  • Refraction seismic survey: Tam Diep Tunnel and Thung Thi Tunnel belong to North-South Expressway in Ninh Binh and Thanh Hoa provinces)
  • Multichannel surface wave (MASW) refractive seismic survey, power plant Wind Hoa Thang: in Hoa Thang, Bac Binh district, Binh Thuan province
  • Seismic and deep 2D electrical survey of Babonueu Tunnel, Vung Ro Tunnel 1 , Vung Ro 2 Tunnel, Vung Ro 4 Tunnel, Bai Gio Tunnel (Renovation Project of Tunnel on the Vinh - Nha Trang railway section)
  • Exploration of 2D photoelectric depth measurement method, wind power plant project Huong Tan, Huong Hoa district, Quang Tri province
  • Exploration of 2D photoelectric depth measurement method, wind power plant project Tan Linh, Huong Hoa district, Quang Tri province
  • Doc San Tunnel Refraction Seismic Survey: In Cam Ranh - in Cao North - South expressway, (Nha Trang - Cam Lam section, belonging to the Expressway project) North South)
  • Refraction seismic survey of Tuy An Tunnel (Km 04+970), Tuy An district, Phu Yen province (Construction Component Project of Quy Nhon - Chi Thanh section, North-South Expressway project)
  • Refraction seismic survey Tunnel 1, Tunnel 2, Duc Pho district, province Quang Ngai (Construction Component Project of Quy Nhon - Chi Thanh section, North-South Expressway project).
  • Refraction seismic survey of Son Trieu Tunnel: (Construction Component Project) Quy Nhon - Chi Thanh section, part of the North - South Expressway project). (Attend component project of Quang Ngai - Hoai Nhon section, Binh Dinh province, belonging to North - South Expressway project)
  • Refraction seismic survey of Dong Nang Tunnel (KM 578+140), Ky . district Anh, Ha Tinh Province (Construction Investment Component Project of Vung Ang - Bung, part of the North - South Expressway project)
  • Refraction seismic survey Tunnel 1 - Tunnel 2 - Tunnel 3 (KM 14-KM51), Da Bac district and Mai Chau district, Hoa Binh province
  • Survey of depth measurement of 2D electrical images, Nam Chan hydropower project, Sin . district Ho, Lai Chau Province
  • Surveying depth measurement of 2D electric images, Nam Cuoi 1, 1 B hydropower projects, Nam Nhun district, Lai Chau province
  • Survey of depth measurement of 2D electric images, Chieng So 2 Hydropower Plant, Dien district Bien Dong, Dien Bien province
  • Surveying and measuring depth of 2D electrical images, Hua Bun hydropower project, Nam . commune Ban, Nam Nhun district, Lai Chau province
  • Survey of depth measurement of 2D electric images, Song Con 3 hydropower project, district Bac Quang, Ha Giang province
  • Survey of depth measurement of 2D electrical images, Nung Than 1 hydropower project, district Phong Tho, Lai Chau province
  • Horizontal seismic survey between boreholes at Power - Gas plant (Nhon Trach district, Dong Nai province)
  • Survey of 2D resistive tomography to locate Karsto . cave on the Hanoi - Ha Giang highway

Business capacity

Since the establishment of the Company, with an open and open mechanism, it has attracted many qualified and skilled scientists and technicians in many fields, especially in the field of Geophysics - Geology - Geodesy. .

The company has equipped with modern equipment and applied geophysical exploration methods, with advanced processing software to solve complex geological tasks.

Currently, the total number of employees of the whole company is 26 employees, of which:

  • Engineer: 5
  • College: 5
  • Intermediate: 6
  • Workers: 10
Certificate of Competency, Technology Development Company T&S

Equipment and technology

T&S Company (Limited) has equipped with synchronous and modern technological equipment to perform all types of work in the field of geotechnical survey and survey, including:

2D resistivity imaging depth device (2D tomography)
Syscall Pro Switch-48 . Photoelectric depth measuring device: Syscall Pro Switch-48
Figure 1. Syscall Pro Switch-48 . Photoelectric depth measuring device: Syscall Pro Switch-48
FlashRES UNIVERSAL 61 channels, 64 electrodes (Australia)
2D photoelectric depth probe: FlashRES UNIVERSAL 61 channels, 64 electrodes (Australia)
Figure 2. 2D photoelectric depth measurement device: FlashRES UNIVERSAL 61 channel, 64 electrodes (Australia)

Application in geological survey, engineering geology, exploration Mineral and groundwater exploration, research depth to 120 meters.

  • Using 2D, 3D resistivity tomography depth measurement by device Multipolar measurement: 48 electrodes (Electrisal Resistivity Tomography: ERT), with 10 different electrode array arrangements, emitter voltage as high as 1000 volts, emitter current: 2.5 Amps: Symmetrical depth measurement Slumbeger; Wenner symmetric depth measurement; Symmetrical depth measurement Slumbeger-Wenner; Dipol-Dipol depth measurement; Measure Pol-Dipol; Pol-Pol; Measure resistivity on shallow water rivers and seas, Measure potentials course; Measure electrical cross-section.
  • 2D, 3D measurement with high density of data points, automatic data storage Dynamic, high accuracy, Data collection capacity is many times times that of conventional depth gauges.
  • Measure polarization with 20 attenuation windows, to determine the parameters No.: Resistivity (Om.m)
  • Measuring polarization value 20 windows: from M 1 to M 20, attenuation time total decrease T, attenuation time half T1/2, decay rate , to determine the boundaries and thickness of the conductive ore bed, diffuse ore (Metal coefficient: metal content), aquifer water, coal seam.
  • Data is downloaded via USB 232C port, then run directly on RES2DINV software, the Geology - Resistance . section pressure immediately after measuring in the field.
Seismometer: GEODE ES-24 (24 US Channels)
Geode ES24 seismometer (Geometrics - USA)
Figure 3. Geode ES24 seismometer (Geometrics - THE USA)
Seismometer ES-24 (24 US channels)
ES-24 Seismic Recorder (24 American channels)
Figure 4. ES-24 seismic recorder (24 US channels)

Used for refractive seismic, reflected seismic, geo earthquake in borehole

Seismic measurement in borehole

Principle diagram of seismic survey in borehole

Receiver under borehole

Includes 2 receiver blocks, distance between 2 receiver blocks: 1 meter, each block including 01 Vp vertical wave receiver and 02 Vs . horizontal wave receiver

2D resistivity imaging depth device (2D tomography)
Seismic receiver under the Borehole
Figure 5. Seismic receiver under the Borehole
Seismic transmitters in the borehole
Principle of Crosshole Seismic Measurement
Figure 6. Diagram of Crosshole . seismic measurement principle
BALLARD Borehole Shearwave Source Rich Transverse Wave Source (BALLARD, USA)
Figure 7. Transverse rich wave source in borehole BALLARD Borehole Shearwave Source (BALLARD, USA)

Plasma explosion by high voltage wind, creating waves in the pit drill to measure transverse seismic between boreholes

Plasma-type seismic generator in borehole
Figure 8. Plasma seismic wave generator in borehole
Automatic machine hammer device - remote control, power from ac qui: Generate waves for seismic measurements in areas that are not allowed blasting spells
Remote-controlled automatic hammer
Figure 9. Automatic remote control hammer
Carota Matrix Logger measuring station manufactured by Matrix (USA)

Specialized in measuring Carota Geophysical methods in boreholes with depth up to 500 meters, used for geological survey, geology construction, coal exploration: Measuring soil density (Gama-Gama scattering), natural gamma parameter of rock (Gamma), measure longitudinal resistivity borehole wall, measure natural potential, measure borehole diameter, measure degree borehole deviation.

Carota measuring station in the borehole
Figure 10. Carota measuring station in borehole
24 channel receiver: Measuring longitudinal seismic waves in borehole
24-channel receiver: Measuring longitudinal seismic waves in boreholes
Figure 11. 24-channel receiver: Measuring longitudinal seismic waves in the crater wait
Electromagnetic field measuring device: TDEM 47 HP (GEONICS company of Canada)
PROTEM Time Domain Electromagnetic Measurement System (TDEM)
Figure 12. PROTEM Time Domain Electromagnetic Measurement System (TDEM): TEM 47HP: essential to suit many applications, from research engineering and near-surface environmental studies, up to three- raw materials at depths of 500 m or more.
Short Sea Reflective Seismic Device

1.1 Ha's 5000 volt high voltage pulse generator, 1000 joule capacity Lan (Geo Spark 1000 J)

5000 volt high voltage generator
Figure 14. 5000 volt high voltage generator
The controller collects seismic data
Controllers and Metrics
Figure 15. Controller and data collection

11.3. Receiver (24 Hydrophon series) and radio transmitter shock (Bombo)

Seismic Receiver and Transmitter
Figure 16. Signal receiver and seismic transmitter
Topographic measuring equipment
  • Global Positioning Meter RTK S800A (Italya): 3 pcs
  • Total station TM30- Leica - Switzerland/Total station TM30- Leica- Switzerland): 02 sets (measurement accuracy: 0.5" angle, measure side 0.6mm+1mm/km)
  • Total station TCA2003 - Leica- Switzerland / Total station TCA2003- Leica- Switzerland : 02 sets (measurement accuracy 0.5” angle, measuring side 1mm+1mm/km): 2 pcs
  • Handheld Gps: 3pcs
Heat conductivity meter: TLS-100 (Canada)
TLS100 -THERMAL Heat Transfer Gauge (Canada)
Figure 17. TLS100 -THERMAL Heat Transfer Gauge (Canada)
Geological Survey Equipment
  • Drill XY-1, GX1T
  • UKB Hand Drill
  • CPTu Penetration Machine
  • Field laboratory equipment

Some pictures of the company's equipment and activities

Below is a collection of images of the company's activities during the implementation of the project that has been implemented with the application of the technologies mentioned by the company in the above Equipment and technology section.

Seismic survey Drilling hole at the site
Figure 18. Seismic survey Drilling hole at the site
Survey of resistive tomography to locate Karsto cave on Hanoi - Ha Giang highway
Figure 19. Survey of resistive tomography to locate Karsto cave on Hanoi - Ha Giang highway
Horizontal seismic survey between drill holes at Nhon Trach 3-4 Gas Power Plant (Nhon Trach district, Dong Nai province)
Figure 20. Horizontal seismic survey between drill holes at Nhon Trach 3-4 Gas Power Plant (Nhon Trach district, Dong Nai province)
Survey of Huoi Lam Phan - Thuong Hydropower Project (Laos)
Figure 21. Survey of Huoi Lam Phan - Thuong Hydropower Project (Laos)
Mine blasting for seismic survey of Nam Kon hydropower project (Laos)
Figure 22. Mine blasting for seismic survey of Nam Kon hydropower project (Laos)
Seismic survey of Dawk Rinh hydropower project (Son Tay district, Quang Ngai province)
Figure 23. Seismic survey of Dawk Rinh hydropower project (Son Tay district, Quang Ngai province)
Mine blasting and seismic survey of Tuy An tunnel project of North - South Highway (Tuy An district, Phu Yen province)
Figure 24. Mine blasting and seismic survey of Tuy An tunnel project of North - South Highway (Tuy An district, Phu Yen province)
Blasting and Seismic Survey of Dong Nang Tunnel of North-South Expressway (Ky Anh District, Ha Tinh Province)
Figure 25. Blasting and Seismic Survey of Dong Nang Tunnel of North-South Expressway (Ky Anh District, Ha Tinh Province)
Seismic survey: Multi-channel surface wave spectroscopy (MASW), wind power project in Hoa Thang commune, Bac Binh district, Binh Thuan province and Le Thuy district, Quang Binh province
Figure 26. Seismic survey: Multi-channel surface wave spectroscopy (MASW), wind power project in Hoa Thang commune, Bac Binh district, Binh Thuan province and Le Thuy district, Quang Binh province

Level 3 Certificate in Geological and Topographic Surveying activities

Issuing agency: Hanoi Department of Construction, No. 121/QD-SXD, March 9, 2023

Certificate of business registration

Issuing agency: Department of Planning and Investment - Bac Ninh City People's Committee, October 25, 2004

The tax registration certificate

Issuing agency: Bac Ninh City Tax Department